DA 02-885

April 17, 2002

**THE FCC\'S ADVISORY COMMITTEE FOR THE**

**2003 WORLD RADIOCOMMUNICATION CONFERENCE APPROVES**

**DRAFT PROPOSAL**

On April 4, 2002, the World Radiocommunication Conference Advisory
Committee (WRC-03 Advisory Committee) adopted a recommendation to the
Commission on an issue that the 2003 World Radio-communication
Conference (WRC-03) will address. The WRC-03 Advisory Committee was
established by the Commission in January 2001 to assist it in the
development of proposals for WRC-03. To that end, the WRC-03 Advisory
Committee has forwarded the recommendations it has developed since the
beginning of 2001 to the Commission for consideration. We have attached
to this Public Notice the WRC-03 Advisory Committee's recommendation,
which is in the form of recommended draft proposal to the WRC-03. We
appreciate the substantial amount of work that the WRC-03 Advisory
Committee has put into developing its recommendation. This Public Notice
requests comments on this recommendation.

Based upon our initial review of the recommendation forwarded to the
Commission, the International Bureau, in coordination with other
Commission Bureaus and Offices, tentatively concludes that we can
generally support the proposal recommended by the WRC-03 Advisory
Committee. We seek comment on this recommendation that appears in the
WRC-03 Advisory Committee document and on our tentative conclusion.

In addition, the National Telecommunications and Information
Administration (NTIA) has submitted letters to the Commission containing
draft proposals that have been developed by the Executive Branch
Agencies. We also request comment on these draft proposals, which are
attached hereto as well.

The FCC will consider the draft proposals and comments provided in its
upcoming consultations with the U.S. Department of State and NTIA in the
development of U.S. proposals to WRC-03. Once agreed by these agencies
of the U.S. Government, proposals will be used by U.S. delegations at
bilateral, regional and international meetings. The draft proposals
attached to this Public Notice may evolve as we approach WRC-03 and
during the course of interagency discussions. Therefore, they do not
constitute the final national position on these issues.

The complete texts of these draft proposals are also available in the
FCC\'s Information Reference Center, Room CY-A257, 445 12th Street, SW,
Washington, DC 20554 and by accessing the FCC\'s WRC-03 world wide web
site at http://www.fcc.gov/wrc-03. To comment on the proposals, please
submit an original and one copy of your comments to the Office of the
Secretary, Federal Communications Commission, 445 12th Street, SW,
Washington, DC 20554 and provide a courtesy copy to Alex Roytblat, FCC
WRC-03 Director, Room 6-B505. When possible, these comments should also
be forwarded to the Commission via the Internet at: wrc03@fcc.gov.
Comments should refer to specific proposals by document number. The
deadline for comments on the draft proposals and NTIA letters is **May
10, 2002**.

**I. Informal Working Group 6: Public Protection and Other Issues**

DRAFT PROPOSAL FOR THE WORK OF THE CONFERENCE

Doc. WAC/100(04.04.02)

*(Originated by NTIA and approved by Informal Working Group 6)*

**WRC-2003 Agenda Item 1.2:** *to review and take action, as required,
on No. **S5.134** and related Resolutions **517 (Rev. WRC-97)** and
**537 (WRC-97**) and Recommendations **515 (Rev. WRC-97), 517 (HFBC-87),
519 (WARC-92)** and Appendix **S11**, in light of the studies and
actions set out therein, having particular regard to the advancement of
new modulation techniques, including digital techniques, capable of
providing an optimum balance between sound quality, bandwidth and
circuit reliability in the use of the HF bands allocated to the
broadcasting service;*

**ISSUE:** Introduction of digital sound broadcasting below 30 MHz

**Background Information:** This agenda item is directed towards the
operational use of digital modulation techniques for broadcasting in the
HF bands. There has been sufficient progress in ITU-R SG 6, so that the
digital modulation techniques to be considered under this agenda item
are limited to just the digital modulation techniques recommended in
Recommendation ITU-R **BS.1514**. WRC‑2003 will therefore be fully
competent to set any necessary conditions for introducing these
digitally modulated emissions to the HF bands allocated to broadcasting.

The collection of all the articles, resolutions and recommendations
listed in the agenda item text are the ones that will need to be
reviewed for suppression or modification in the light of the progress
that has been made in the intervening years for digital modulation use
in the HF broadcasting bands. To complete the overall need, some
additions will have to be made. The suppressions, modifications and
additions that are incorporated in the U.S. proposal form an integrated
package that deals in an efficient manner with all the aspects of the
consequent needs connected with this non-allocation agenda item. By and
large, the specific wording of these suggested changes are those that
were developed within the ITU-R's Study Group 6 at its WP6E meetings
during 2001.

Recommendation ITU-R **BS.1514,** mentioned above, is a system
recommendation, wherein the acceptable digital modulation techniques are
recorded. The development and testing of this modulation, including its
various "modes" associated with different levels of robustness and audio
quality, has brought the techniques close to consumer product status. It
is expected that by the end of 2003, or not long thereafter, there will
be on the market receivers that include a HF digital capability. In
addition, modern HF transmitters can accept these digital signal inputs.

It is because of this progress that this agenda item and this proposal
exist \-- and, without diminishing broadcaster and listener access to
traditional amplitude modulation, simply permits digital modulation in
the mix of acceptable and available listening.

Furthermore, since the introduction of digital modulation for
operational use is two years or so from 2002, the proposed modifications
to existing articles, resolutions and recommendations treat all HF
broadcasting bands on an equal footing. There is no longer any
compelling reason to separate the conditions of use of the "WARC-92"
bands from the other HF broadcasting bands. The solution proposed is to
modify Article footnote **S5.134** so that any ITU-R approved amplitude
modulation or digital modulation can be broadcast in the "WARC-92" bands
after 1 April 2007. Before that time, the proposal is not to permit
broadcasting in these bands, other than on a non-harmful interference
basis (as is the current situation using **S4.4**).

Three resolutions and recommendations are proposed to be suppressed
since they are no longer relevant. They are noted at the end of the
proposal, with appropriate reasons.

**Proposals:**

**USA/ /**

**MOD**

RESOLUTION 517 [(Rev.WRC-03)]{.underline} ~~(Rev.WRC-97)~~

[Introduction of digitally modulated and single-sideband
emissions]{.underline}~~Transition from double-sideband to
single-sideband or other spectrum-efficient modulation techniques~~ in
the high-frequency bands between 5 900 KHz and 26 100 KHz allocated to
the broadcasting service

The World Radiocommunication Conference (Caracas,
~~1997~~[2003]{.underline}),

considering

*a)* [that digital techniques are being introduced into many existing
services]{.underline}~~the high-frequency (HF) bands allocated to the
broadcasting service between 5 900 kHz and 26 100 kHz are severely
congested~~;

*b)* that [digital and]{.underline} single-sideband (SSB) techniques
allow more ~~efficient~~ [effective]{.underline} utilization of the
frequency spectrum than double-sideband (DSB) techniques;

*c)* that [digital and]{.underline} SSB techniques enable reception
quality to be improved;

~~*d)* that Recommendation **515 (Rev.WRC-97)** encourages the
accelerated design and manufacture of SSB transmitters and receivers;~~

*~~e~~[d]{.underline})* Appendix S11 concerning the [Digital
and]{.underline} SSB system specification[s]{.underline} in the HF
broadcasting services;

~~*f)* that rapid developments are taking place in digital sound
broadcasting technologies;~~

[*e)* that ITU-R in its Recommendation ITU-R]{.underline} **BS.1514**
[has recommended system characteristics for digital sound broadcasts in
the broadcast bands below 30 MHz;]{.underline}

*~~g~~[f]{.underline})* that digital modulation ~~or other
spectrum-efficient modulation~~ techniques are expected to provide the
means to achieve the optimum balance between sound quality, circuit
reliability and bandwidth;

*~~h~~[g]{.underline})* that digitally modulated emissions can, in
general, provide more efficient coverage than amplitude-modulated
transmissions by using fewer simultaneous frequencies and less power;

~~*i)* that the lifetime of a transmitter is at least twenty years;~~

*~~j~~[h]{.underline})* that it is economically ~~un~~attractive, using
current technology, to convert [modern]{.underline} ~~existing~~
conventional DSB broadcasting systems to ~~SSB~~ [digital]{.underline}
operation [in accordance with *considering d)* above]{.underline};

*~~k~~[j]{.underline})* that some DSB transmitters have been used with
digital modulation techniques without transmitter modifications;

~~*l)* that the lifetime of a receiver is of the order of ten years;~~

*~~m~~[k]{.underline}*[)]{.underline} that ITU-R is carrying out
~~urgent~~ [further]{.underline} studies on the development of
broadcasting [using]{.underline} digital[ly]{.underline}
modulat[ed]{.underline}~~ion~~ emissions in the bands allocated to the
broadcasting service below 30 MHz~~;~~[,]{.underline}

~~*n)* that other spectrum-efficient modulation techniques may be
developed in the future,~~

resolves

1 that the [early introduction of digitally modulated emissions
as]{.underline} ~~procedure in the Annex to this Resolution shall be
used for the purpose of ensuring an orderly transition from DSB to SSB
or other spectrum-efficient modulation techniques~~ recommended by ITU-R
in the HF bands between 5 900 kHz and 26 100 kHz allocated to the
broadcasting service [is to be encouraged]{.underline};

[2 that digitally modulated and SSB emissions shall comply with the
characteristics specified in Appendix S11;]{.underline}

[3 that whenever an administration replaces a DSB emission by an
emission using digital or SSB modulation techniques, it shall ensure
that the level of interference is not greater than that caused by the
original DSB emission, and shall use RF Protection values specified in
Recommendations DAB (WRC-03) and 517 (Rev. WRC-03);]{.underline}

~~2~~[4]{.underline} that the ~~final date for the cessation~~
[continued use]{.underline} of DSB ~~emissions specified in the Annex to
this Resolution~~ shall be periodically reviewed by [a]{.underline}
competent future world radiocommunication conference~~s~~ in the light
of the latest available complete statistics on the [capability of
administrations to introduce digital systems]{.underline} ~~worldwide
distribution of SSB and other spectrum-efficient modulation technique
transmitters and receivers, as called for in Resolution **537
(WRC-97**),~~

instructs the Director of the Radiocommunication Bureau

to compile and maintain the statistics referred to in *resolves*
~~2~~[4]{.underline}, to make these statistics available to
administrations and to submit summaries thereof to [a]{.underline}
competent future world radiocommunication conference~~s~~,

invites ITU-R

to continue its studies on digital techniques in HF broadcasting ~~as a
matter of urgency~~ with a view to [assist in]{.underline} the
development of this technology for future use,

invites administrations

[1]{.underline} to assist the Director of the Radiocommunication Bureau
by providing the relevant statistical data and to participate in ITU-R
studies on matters relating to the development and introduction of
digitally modulated [emissions]{.underline} ~~transmissions~~ in the HF
bands between 5 900 kHz and 26 100 kHz allocated to the broadcasting
service~~.~~[;]{.underline}

[2 to bring to the notice of transmitter and receiver manufacturers the
most recent results of relevant ITU-R studies on spectrum-efficient
modulation techniques suitable for use at HF as well as the information
referred to in considerings *d)* and *e)*.]{.underline}

**Reasons:** The changes to this resolution reflect the introduction of
digital and SSB emissions and the consequent need to protect DSB
emissions from digital and single sideband emissions, and vice versa.
The introduction of digital emissions does not substitute for single
sideband emission use. The resolution has been modified so that both are
considered on an equal regulatory footing. Several modifications made in
the *considerings* are a consequence of digital modulation development
for HF broadcasting since WRC-97.

USA/ /

SUP

ANNEX TO RESOLUTION 517 (Rev.WRC-97)

Reasons: Due to the modifications to Resolution 517 related to the
introduction of digital and SSB emissions and deletion of the
requirement of the transition procedures, this annex is no longer
needed. This annex deals with a previous idea that all DSB would cease
after 2015. The complete package with regard to this agenda item
considers that this concept of cessation of one of the approved
modulation methods should be considered by a future competent
conference; that it is unrealistic to consider ceasing a particular type
of modulation without any concern for the listener and broadcaster
market 12 years after WRC-03.

USA/ /

MOD

APPENDIX S11

[System specifications for]{.underline} Double-Sideband
(DSB)[,]{.underline} ~~and~~ Single-Sideband (SSB) [and Digitally
Modulated Emissions]{.underline} ~~System Specifications~~ in the HF
Broadcasting Service

**Reasons:** Updating the appendix title to reflect the proposed use.

**USA/ /**

**[NOC]{.underline}**

Double-sideband system (DSB)

**Reasons:** The current text is adequate as written.

PART B - Single-sideband system (SSB)

# System parameters

USA/ /

MOD

## 1.1 Channel spacing {#channel-spacing .unnumbered}

[In a mixed DSB, SSB and Digital environment]{.underline} ~~During the
transition period~~ (see Resolution **517 ([Rev. WRC-03]{.underline}
~~HFBC-87~~)**), the channel spacing shall be 10 kHz. In the interest of
spectrum conservation, ~~during the transition period,~~ it is also
permissible to interleave SSB emissions midway between two adjacent DSB
channels, i.e., with 5 kHz separation between carrier frequencies,
provided that the interleaved emission is not to the same geographical
area as either of the emissions between which it is interleaved.

[In an all inclusive SSB environment,\_]{.underline}~~After the end of
the transition period~~ the channel spacing and carrier frequency
separation shall be 5 kHz.

Reasons: Updating this text to reflect digital and SSB use and deleting
text concerning the transition period. No change in the carrier
reduction levels.

**USA/ /**

MOD

## 2.6 Carrier reduction (relative to peak envelope power) {#carrier-reduction-relative-to-peak-envelope-power .unnumbered}

[In a mixed DSB, SSB and Digital environment]{.underline} ~~During the
transition period~~ the carrier reduction shall be 6 dB to allow SSB
emissions to be received by conventional DSB receivers with envelope
detection without significant deterioration of the reception quality.

[In an all inclusive SSB environment]{.underline} ~~At the end of the
transition period~~, the carrier reduction shall be 12 dB.

**Reasons:** Updating this text to reflect digital and SSB use and
deleting text concerning the transition period. No change in the carrier
reduction levels.

**USA/ /**

ADD

PART C - Digital system

# 1 System parameters {#system-parameters-1 .unnumbered}

## 1.1 Channel spacing {#channel-spacing-1 .unnumbered}

The initial spacing for digitally modulated emissions use shall be 10
kHz. However, interleaved channels with a separation of 5 kHz may be
used in accordance with the appropriate protection criteria appearing in
Recommendation **DAB (WRC-03)**, provided that the interleaved emission
is not to the same geographical area as either of the emissions between
which it is interleaved.

## \[1.2 Channel utilisation {#channel-utilisation .unnumbered}

Channels using digitally modulated emissions may be commingled with
analogue emissions in the same HFBC band provided the protection to the
analogue emissions is at least as great as that which currently is in
force with analogue-to-analogue protection. To accomplish this may
require that the digital spectral power density (and total power) be
lower by several dB than is currently used for the same emission circuit
using either DSB or SSB emissions.

# 2 Emission characteristics {#emission-characteristics .unnumbered}

## 2.1 Bandwidth and centre frequency {#bandwidth-and-centre-frequency .unnumbered}

A full digitally modulated emission will have a 10 kHz bandwidth with
its centre frequency at any of the 5 kHz possibilities within the HFBC
bands.

There are "simulcast" modes, which are a combination of analogue and
digital emissions of the same programme in the same channel, that may
use a digital emission of 5 kHz or 10 kHz bandwidth, next to either a 5
kHz or 10 kHz analogue emission. In all cases of this type, the 5 kHz
interleaved raster used in HFBC shall be adhered to in placing the
emission within the HFBC bands.

## 2.2 Frequency tolerance {#frequency-tolerance .unnumbered}

To be entered after WP6E determines the values at either its March 2002
or September 2002 meeting.

## 2.3 Audio frequency band {#audio-frequency-band .unnumbered}

Digital source coding within a 10 kHz bandwidth, taking account of the
need for various levels of error avoidance, detection and correction
coding emission mitigation, can range from the equivalent of monophonic
FM (approximately 15 kHz) to low level speech codec performance of the
order of 3 kHz. The choice of audio quality is connected to the needs of
the broadcaster/listener, and includes such characteristics to consider
as the propagation channel conditions expected. There is no single
specification, only the upper and lower bounds noted in this paragraph.

## 2.4 Modulation {#modulation .unnumbered}

Quadrature amplitude modulation (QAM) with Orthogonal frequency division
multiplexing (OFDM) shall be used. 64 QAM is feasible under many
propagation conditions; factors of ½, ¼ and perhaps 1/8 of this are
specified for use when needed.

Reasons: Part C is added to address the requirements of digital systems.
Specific channelization values, audio frequency bandwidths and "modes"
of digital modulation conform to ITU-R system Recommendation BS.1514.

**USA/ /**

**ADD**

DRAFT RECOMMENDATION DAB (WRC-03)

RF protection ratios associated with digitally modulated emissions in
the\
HF bands allocated exclusively to the broadcasting service

The World Radiocommunication Conference (Caracas, 2003),

considering

a\) that this Conference has resolved to encourage the introduction of
digitally modulated emissions in the high frequency broadcast bands
allocated exclusively to the broadcasting service;

b\) that the current use of the spectrum is based on the use of
double-sideband (DSB) emissions;

c\) that RF co-channel and adjacent channel protection ratios are among
the fundamental parameters when determining compatibility;

d*)* that this Conference has adopted Resolution **517 (Rev. WRC-03)**
relating to the introduction of digitally modulated emissions in the HF
bands allocated exclusively to the broadcasting service;

e\) that Part C of Appendix **S11** contains digital system
specifications that refer to this Recommendation for matters dealing
with appropriate protection ratios,

recommends

**1** that in the application of Article **S12**, the protection ratios
specified in the Annex to this Recommendation be used for all those
cases where digitally modulated emissions operate in the same bands as
double-sideband analogue emissions.

Reasons: This resolution provides protection ratios associated with
digital emissions in the same manner as that of Recommendation 517,
originally from HFBC-87, which deals with SSB and DSB only. It, along
with its Annex, specifies the levels of protection required both to
protect the amplitude modulation transmissions from digital modulation
emissions, digital modulation emissions from other digital modulation
emissions, and digital modulation emissions from amplitude modulation
emissions.

USA/ /

ADD

ANNEX TO RECOMMENDATION DAB (WRC-03)

RF protection ratio values

1.  In accordance with Resolution **517 (Rev. WRC-03)** digital
    modulation may be used in any of the HF bands allocated exclusively
    to the broadcasting service. This accommodation has to be made with
    the appropriate amounts of protection given to both analogue and
    digital emissions. RF protection ratios are part of the overall
    regulation of these emissions. Their values appear in the table in
    this annex.

2.  The table consists of RF protection ratios for co-channel and
    adjacent channel conditions. The independent variable in the table
    is the centre frequency separation in kHz of any pair of emissions,
    wanted vs. unwanted. The ratio data are in decibels.

3.  The digital modulation governing these protection ratios is that
    which appears in summary in Part C of Appendix **S11**, as revised
    at this conference, and the analogue modulation is double-sideband
    modulation or single sideband modulation as summarized in Parts A
    and B, respectively, of the same Appendix.



Protection Ratio Table

  ------------- ------------- --------- ------ ------ ------------ ---------- ---- -------- ----- --------- ----- --------- ----- ---------
  **Wanted      **Other\                              Centre                                                                      
  signal**      signal**                              frequency                                                                   
                                                      separation                                                                  
                                                      (kHz)                                                                       

                                                                                                                                  

                                                      0                       5             10              15              20    

  **DSB**       **Digital**             ^1)^          6                       3             -31             -42             -48   

  **Digital**   **DSB**                 ^2)^          8                       2             -31             -38             -40   

  **Digital**   **Digital**             ^2)^          17                      12            -35             -39             -44   

  SSB                         Digital          ^3)^                \-              \-             \-              \-              \-

  Digital                     SSB              ^3)^                \-              \-             \-              \-              \-
  ------------- ------------- --------- ------ ------ ------------ ---------- ---- -------- ----- --------- ----- --------- ----- ---------



Notes:

> ^1)^ Values relative to the DSB/DSB co-channel RF protection ratio

2)  Values for a BER of 10^-4^

3)  *Values for SSB into digital and digital into SSB will be supplied
    from the TG6/7 meetings to be held in March 2002 and September 2002*

Reasons: This annex provides the appropriate amounts of protection given
to both analogue and digital emissions and supports the text of DRAFT
RECOMMENDATION DAB(WRC-03).

USA/ /

**MOD**

RECOMMENDATION 517 (~~HFBC-87~~[Rev.WRC-03]{.underline})

~~Relative~~ RF protection ratio values for single-sideband (SSB)
emissions in the HF bands allocated exclusively to the broadcasting
service

The World ~~Administrative Radio~~ [Radiocommunication]{.underline}
Conference ~~for the Planning of the HF Bands Allocated to the
Broadcasting Service~~ (\[Geneva\] [2003]{.underline}, ~~1987~~),

considering

*a)* that [WRC-97]{.underline} ~~the Conference has~~ adopted [Article
**S12** as the seasonal]{.underline} ~~a method for the~~ planning
[procedure for]{.underline} ~~of~~ the HF bands allocated exclusively to
the broadcasting service;

*b)* that this ~~method~~ [procedure]{.underline} is based
[principally]{.underline} on the use of double-sideband (DSB) emissions;

*c)* that the RF co-channel protection ratio is one of the fundamental
planning parameters;

*d)* that ~~the~~ [this]{.underline} Conference has adopted Resolution
**517 [(Rev. WRC-03)]{.underline}** relating to the ~~transition~~
[introduction of digitally modulated and]{.underline} ~~from DSB to~~
SSB emissions in the HF bands allocated exclusively to the broadcasting
service ~~and Recommendation **515** relating to the introduction of
transmitters and receivers capable of both DSB and SSB modes of
operation;~~

*e)* that the SSB system characteristics for HF broadcasting are
contained in Appendix **S11**;

~~*f)* that, however, due to their provisional nature, the values of the
relative RF protection ratio to be applied for all relevant combinations
of wanted and unwanted DSB and SSB emissions have not been included in
the Appendix mentioned in *considering e)*;~~

*g)* that ~~preliminary~~ studies have shown that SSB emissions may
require a lower RF co‑channel protection ratio for the same reception
quality;

~~*h)* Resolution **514 (HFBC-87)**~~[^1] ~~relating to the procedure to
be applied by the Radio Regulations Board and the Bureau in the revision
of relevant parts of their Technical Standards used for HF
broadcasting,~~

recommends

that, ~~subject to the procedure to be applied by the Radio Regulations
Board and the Bureau in the revision of relevant parts of their
Technical Standards used for HF broadcasting given in Resolution** 514
(HFBC-87)^\*^**,~~ the values of ~~relative~~ RF protection ratio given
in the Annex to this Recommendation be used by the Bureau in its
[application of Article **S12**]{.underline} ~~Technical Standards~~
relating to SSB [and DSB]{.underline} emissions in the HF bands
allocated exclusively to the broadcasting service,

~~invites the ITU-R~~

~~to continue to study the values of relative RF protection ratio for
the different cases and frequency separations covered in the Annex to
this Recommendation,~~

~~and recommends administrations~~

~~to participate actively in these studies.~~

**Reasons:** This recommendation has been modified to reflect the
introduction of digital emissions. No substantive changes were made in
the protection ration values with SSB vs. DSB amplitude modulation.

**USA/ /**

**MOD**

**ANNEX TO RECOMMENDATION 517 (~~HFBC-87~~[Rev.WRC-03]{.underline})**

~~Relative~~ RF protection ratio values

1 The values of ~~relative~~ RF protection ratio given in the table
should be used whenever SSB emissions in conformity with the
specification in Appendix **S11** are involved in the use of the HF
bands allocated exclusively to the broadcasting service.

~~2 The values given refer to the case of co-channel DSB wanted and
unwanted signals for the same reception quality.~~

~~3~~[2]{.underline} For the reception of DSB and SSB (6 dB carrier
reduction relative to peak envelope power) wanted signals, a
conventional DSB receiver with envelope detection designed for a channel
spacing of 10 kHz is assumed.

~~4~~[3]{.underline} For the reception of an SSB wanted signal (12 dB
carrier reduction relative to peak envelope power), the reference
receiver as specified in Appendix **S11**, Part B, Section 3, is
assumed.

[~~5~~4]{.underline} SSB signals with 6 dB carrier reduction relative to
peak envelope power assume equivalent sideband power as specified in
Appendix **S11**, Part B, § 1.2.

[~~6~~5]{.underline} The figures for case 2 in the following table
relate to a situation where the centre frequency of the intermediate
frequency pass-band of the DSB receiver is tuned to the carrier
frequency of the wanted SSB signal. If this is not the case, the value
for a difference of +5 kHz may increase to\
--1 dB.\]

~~Releative~~ RF protection ratio values with reference to the
co-channel RF protection\
ratio for DSB wanted and unwanted signals (dB)^1^ for use in the HF
bands\
allocated exclusively to the broadcasting service

^1^ Frequency separation ∆*f* less than --20 kHz, as well as ∆*f*
greater than 20 kHz, need not be considered.

**Reasons:** Minor text changes were made to update the annex from
**HFBC-87**. No changes were made in the DSB vs. SSB table of protection
ratios.

**USA/ /**

**MOD**

**S5.134** The ~~use of the~~ bands 5 900-5 950 kHz, 7 300-7 350 kHz,
9 400-9 500 kHz, 11 600‑11 650 kHz, 12 050-12 100 kHz,
13 570-13 600 kHz, 13 800-13 870 kHz, 15 600‑15 800 kHz, 17 480-17 550
kHz and 18 900-19 020 kHz ~~by~~[are allocated to]{.underline} the
broadcasting service [on a primary basis as from 1 April
2007.]{.underline}~~is limited to single sideband emissions with the
characteristics specified in Appendix S11 or to any other spectrum
efficient modulation techniques recommended by ITU-R. Access to these
bands shall be subject to the decisions of a competent conference~~.

**Reasons:** The proposed modification provides a simple unambiguous
regulatory environment for the use of the WARC‑92 extension bands both
before and after the envisaged implementation date of 1 April 2007.
Before the 01/04/07 date, there is no change: in other words, the bands
are not allocated to HFBC. After that date, broadcasters can choose any
modulation means that has ITU-R approval, such as the digital modulation
described in ITU-R Recommendation **BS.1514** and the SSB and DSB
amplitude modulations noted in Article **S11**.

USA/ /

**SUP**

RESOLUTION 537 (WRC-97)

**Reasons:** The survey mentioned in the resolution on transmitter and
receiver statistics related to SSB has been completed, and submitted by
the BR for WRC-2000, as requested from WRC-97. Therefore, there is no
need to carry forward this resolution. The associated Recommendation
**515 (Rev.WRC-97)** is also proposed for suppression as detailed below.

**USA/ /**

SUP

RECOMMENDATION 515 (Rev.WRC-97)

**Reasons:** With the adoption of this Recommendation **BS.1514** and
the fact that IEC has been informed of this development, Recommendation
**515 (Rev.WRC-97)** can be suppressed.

**USA/ /**

**SUP**

RECOMMENDATION 519 (WARC-92)

**Reasons:** This Recommendation, from WARC-92, considers the
possibility of advancing the date of cessation of DSB. In the light of
broadcasting needs in HF, this is totally unrealistic. Thus, there is
concern within many Administrations, expressed on many occasions at
WRC‑97, that the introduction of SSB into HF Broadcasting (and now
digital modulation) should not restrict the ability of administrations
to continue with their existing DSB transmissions for the foreseeable
future and that at this point in time it is inappropriate to specify a
cessation of DSB in favour of SSB in the year 2015. It is also evident
from information presented at WRC-2000 by the Director that the interest
in SSB within HF Broadcasting is virtually non-existent. This
Recommendation should therefore be suppressed.

USA/ /

MOD

ARTICLE S23.12

~~Double side band and single side band t t~~[T]{.underline}ransmitting
stations operating in the HF bands allocated exclusively to the
Broadcasting Service shall meet the system specifications contained in
Appendix S11.

**Reasons:** A consequential change that reflects the change in S11 that
has added digital modulation to the acceptable modulation methods.

**II. Draft Proposals Approved by the National Telecommunications and
Information Administration (NTIA)**

DRAFT PROPOSAL FOR THE WORK OF THE CONFERENCE

**Included in Doc. WAC/099(04.04.02)**

## Agenda Item 1.12c: to consider allocations and regulatory issues related to the space science services in accordance with Resolution 723 (Rev. WRC-2000) and to review all Earth exploration-satellite service and space research service allocations between 35 and 38 GHz, taking into account Resolution 730 (WRC-2000); {#agenda-item-1.12c-to-consider-allocations-and-regulatory-issues-related-to-the-space-science-services-in-accordance-with-resolution-723-rev.-wrc-2000-and-to-review-all-earth-exploration-satellite-service-and-space-research-service-allocations-between-35-and-38-ghz-taking-into-account-resolution-730-wrc-2000 .unnumbered}

**Background Information**: Resolution **723 (Rev. WRC-2000)** *resolves
4,* recommends that WRC-03 consider a review of existing allocations to
space science services near 15 GHz and 26GHz, with a view to
accommodating wideband space-to-Earth space research applications. This
*resolves* is in response to a need for allocations to support planned
high data rate space research missions requiring bandwidths up to
400 MHz. Satellites for these missions will carry telescopes and/or
other passive instruments to measure phenomenon such as the Earth\'s
magnetosphere and solar flares. These missions will be limited in number
with an estimated three to five satellites per year worldwide, and will
generally be in an equatorial orbit with some at geostationary altitudes
and others at the L1 or L2 Sun/Earth equilibrium libration points that
are approximately 1.9 M km from Earth.

An ITU-R study has shown the feasibility of using the band 25.5-27.0 GHz
to satisfy the requirements described above.[^2] The band is currently
allocated to the fixed, mobile, inter-satellite and Earth
exploration-satellite services on a primary basis. The use of the
allocations is further constrained by RR footnotes: **S5.536** sets
conditions on the use of the band by stations in the inter-satellite
service (ISS); **S5.536A** limits the protection afforded EESS earth
stations from the emissions of stations in the fixed and mobile
services; and, **S5.536B** further limits the protection and status of
EESS earth stations in a number of countries.

**Proposal:**

+-----------+----------------+---------------------+------------------+
|           | 25.5-27 GHz    |                     |                  |
+-----------+----------------+---------------------+------------------+
|           | **Allocation   |                     |                  |
|           | to Services**  |                     |                  |
+-----------+----------------+---------------------+------------------+
|           | **Region 1**   | **Region 2**        | **Region 3**     |
+-----------+----------------+---------------------+------------------+
| **USA/    | **25.5-27**    |                     |                  |
| /1**      | EARTH          |                     |                  |
|           | EXPLORA        |                     |                  |
| **MOD**   | TION-SATELLITE |                     |                  |
|           | (space-to      |                     |                  |
|           | Earth)         |                     |                  |
|           |                |                     |                  |
|           | ~~S5.536A~~    |                     |                  |
|           | S5.536B        |                     |                  |
|           |                |                     |                  |
|           | FIXED          |                     |                  |
|           |                |                     |                  |
|           | I              |                     |                  |
|           | NTER-SATELLITE |                     |                  |
|           | S5.536         |                     |                  |
|           |                |                     |                  |
|           | MOBILE         |                     |                  |
|           |                |                     |                  |
|           | [SPACE         |                     |                  |
|           | RESEARCH       |                     |                  |
|           | (              |                     |                  |
|           | space-to-Earth |                     |                  |
|           | )]{.underline} |                     |                  |
|           |                |                     |                  |
|           | Standard       |                     |                  |
|           | frequency and  |                     |                  |
|           | time           |                     |                  |
|           | si             |                     |                  |
|           | gnal-satellite |                     |                  |
|           | (E             |                     |                  |
|           | arth-to-space) |                     |                  |
|           |                |                     |                  |
|           | **MOD**        |                     |                  |
|           | [S5.536        |                     |                  |
|           | A]{.underline} |                     |                  |
+-----------+----------------+---------------------+------------------+

**Reasons:** To add a primary space research service (space-to-Earth)
allocation to the Table of Allocations and to show that the footnote
**S5.536A** will apply to the space research service as well as the
Earth exploration-satellite service.

**USA/ /2**

**MOD**

**S5.536A** Administrations installing Earth exploration-satellite
service [or space research service]{.underline} earth stations cannot
claim protection from stations in the fixed and mobile services operated
by neighbouring administrations. In addition, earth stations operating
in the Earth exploration-satellite service should take into account
Recommendation ITU-R SA.1278.

**Reasons**: This change amends RR footnote **S5.536A** to include SRS
earth stations and to give them the same status as Earth
exploration-satellite service earth stations.

######## *Table S21-4* {#table-s21-4 .unnumbered}

+-------+-----------+-----------+-------+------------+-------+-------+
| ##    | ######    | **Se      | **    |            |       | **R   |
| ####  |           | rvice\*** | Limit |            |       | efere |
|       |           |           | in    |            |       | nce** |
|       |           |           | dB(   |            |       |       |
|       |           |           | W/m2) |            |       | **b   |
|       |           |           | for   |            |       | andwi |
|       |           |           | an    |            |       | dth** |
|       |           |           | gle** |            |       |       |
|       |           |           |       |            |       |       |
|       |           |           | **of  |            |       |       |
|       |           |           | ar    |            |       |       |
|       |           |           | rival |            |       |       |
|       |           |           | (δ)   |            |       |       |
|       |           |           | above |            |       |       |
|       |           |           | the   |            |       |       |
|       |           |           | horiz |            |       |       |
|       |           |           | ontal |            |       |       |
|       |           |           | pl    |            |       |       |
|       |           |           | ane** |            |       |       |
+-------+-----------+-----------+-------+------------+-------+-------+
|       |           |           | **0°  | **5°-25°** | *     |       |
|       |           |           | -5°** |            | *25°- |       |
|       |           |           |       |            | 90°** |       |
+-------+-----------+-----------+-------+------------+-------+-------+
| *     | [25.5-27. | [Space    | [-1   | [-115 + (δ | [-1   | [1    |
| *USA/ | 0 GHz]{.u | Research  | 15]{. | --         | 05]{. | M     |
| /3**  | nderline} | (s        | under | 5)/2]{.    | under | Hz]{. |
|       |           | pace-to-E | line} | underline} | line} | under |
| **    |           | arth)]{.u |       |            |       | line} |
| MOD** |           | nderline} |       |            |       |       |
+-------+-----------+-----------+-------+------------+-------+-------+

**Reasons**: These changes limit the emissions of the space research
service in order to protect the fixed and mobile services from harmful
interference.

Appendix s7, TABLE 8d

Parameters required for the determination of coordination distance for a
receiving earth station

USA/ /4\
MOD

+---------------+-------------+---+----------------+------------------+
| **Receiving   |             |   | **[space       | **[space         |
| space\        |             |   | research\      | resear           |
| radioc        |             |   | ]{.u           | ch]{.underline}\ |
| ommunication\ |             |   | nderline}(4)** | (5)**            |
| service       |             |   |                |                  |
| designation** |             |   |                |                  |
+---------------+-------------+---+----------------+------------------+
|               |             |   |                |                  |
+---------------+-------------+---+----------------+------------------+
| > Frequency   |             |   | > [25.5-27.    | > [25.5-2        |
| > band\       |             |   | 0]{.underline} | 7.0]{.underline} |
| > (GHz)       |             |   |                |                  |
+---------------+-------------+---+----------------+------------------+
| >             |             |   | > [Fixed,      | > [Fixed,        |
|  Transmitting |             |   | > mobil        | > mob            |
| > terrestrial |             |   | e]{.underline} | ile]{.underline} |
| > service     |             |   |                |                  |
| >             |             |   |                |                  |
|  designations |             |   |                |                  |
+---------------+-------------+---+----------------+------------------+
| > Method to   |             |   | > [§ 2.        | > [§             |
| > be used     |             |   | 2]{.underline} | 2.1]{.underline} |
+---------------+-------------+---+----------------+------------------+
| > Modulation  |             |   | > [            | >                |
| > at\         |             |   | N]{.underline} |  [N]{.underline} |
| > earth       |             |   |                |                  |
| > station (1) |             |   |                |                  |
+---------------+-------------+---+----------------+------------------+
|               | > *p*0 (%)  |   | > [0.          | > [              |
|               |             |   | 1]{.underline} | 0.1]{.underline} |
+---------------+-------------+---+----------------+------------------+
| > Earth       | > *n*       |   | > [            | >                |
| > station     |             |   | 2]{.underline} |  [2]{.underline} |
+---------------+-------------+---+----------------+------------------+
| >             | > *p* (%)   |   | > [0.0         | > [0             |
|  interference |             |   | 5]{.underline} | .05]{.underline} |
+---------------+-------------+---+----------------+------------------+
| > parameters  | > *NL* (dB) |   | > [            | >                |
|               |             |   | 0]{.underline} |  [0]{.underline} |
+---------------+-------------+---+----------------+------------------+
| > and         | > *Ms* (dB) |   | > [            | >                |
| > criteria    |             |   | 6]{.underline} |  [6]{.underline} |
+---------------+-------------+---+----------------+------------------+
|               | > *W* (dB)  |   | > [            | >                |
|               |             |   | 0]{.underline} |  [0]{.underline} |
+---------------+-------------+---+----------------+------------------+
|               | > *E* (dBW) | > | > [            | >                |
|               |             |   | -]{.underline} |  [-]{.underline} |
|               |             | A |                |                  |
+---------------+-------------+---+----------------+------------------+
| > Terrestrial | > in *B*    | > | > [4           | >                |
|               | > (2)       |   | 2]{.underline} | [42]{.underline} |
|               |             | N |                |                  |
+---------------+-------------+---+----------------+------------------+
| > station     | *Pt* (dBW)  | > | > [            | >                |
|               |             |   | -]{.underline} |  [-]{.underline} |
|               |             | A |                |                  |
+---------------+-------------+---+----------------+------------------+
| > parameters  | > in *B*    | > | > [--          | > [              |
|               |             |   | 3]{.underline} | --3]{.underline} |
|               |             | N |                |                  |
+---------------+-------------+---+----------------+------------------+
|               | > *G~x~*    |   | > [4           | >                |
|               | > (dBi)     |   | 5]{.underline} | [45]{.underline} |
+---------------+-------------+---+----------------+------------------+
| > Reference\  | > *B* (Hz)  |   | > [10          | > [              |
| > bandwidth   |             |   | 6]{.underline} | 106]{.underline} |
+---------------+-------------+---+----------------+------------------+
| > Permissible | > *Pr*      |   | > [--15        | > [--            |
| >             | > ( *p*)    |   | 0]{.underline} | 150]{.underline} |
|  interference | > (dBW)     |   |                |                  |
| > power       | > in *B*    |   |                |                  |
+---------------+-------------+---+----------------+------------------+

**USA/ /5**

**[NOC]{.underline}**

*(Notes to Table 8d)*

> \(1\) A: analogue modulation; N: digital modulation.
>
> \(2\) *E* is defined as the equivalent isotropically radiated power of
> the interfering terrestrial station in the reference bandwidth.
>
> \(3\) Non-geostationary mobile-satellite service feeder links.
>
> \(4\) Non-geostationary-satellite systems.
>
> \(5\) Geostationary-satellite systems.
>
> \(6\) Non-geostationary fixed-satellite systems.

**Reasons**: Provides the characteristics in Table 8d of Appendix **S7**
of receiving earth stations in the space research service to be used in
determining the coordination contour with respect to transmitting
stations in the fixed and mobile services.

DRAFT PROPOSAL FOR THE WORK OF THE CONFERENCE

Included in Doc. WAC/099(04.04.02)

**Agenda Item 1.14**: to consider measures to address harmful
interference in the bands allocated to the maritime mobile and
aeronautical mobile (R) services, taking into account Resolutions **207
(Rev.WRC-2000)** and **350(WRC-2000**), and to review the frequency and
channel arrangements in the maritime MF and HF bands concerning the use
of new digital technology, also taking into account Resolution **347
(WRC-97)**;

**Background Information**: In an ongoing effort to reduce interference
to HF distress and safety frequencies used in the GMDSS, WRC-2000
determined that after 31 December 2003, general calling should not be
permitted on channels used for distress and safety traffic. The radio
regulations now permit routine voice calling on the two GMDSS duplex
distress and safety traffic channels in the 12 and 16 MHz band. WRC-2000
actions removed the calling function on these two channels. It also
changed these duplex channels to simplex channels, allocating one of the
simplex channels for routine calling via radiotelephone and the other as
dedicated for distress and safety communications. These changes are
scheduled to take effect 31 December 2003. This change will result in a
financial and personnel impact to maritime SAR authorities that
maintains listening watch in these bands, and receives occasional
routine radiotelephone calls in addition to distress and safety calls.
Removal of the ability of shore stations that have search and rescue
responsibilities to receive and make routine calls on these frequencies
will result in the receiving of distress and safety calls on a working
channel not designated for distress and safety purposes. This has caused
some confusion to mariners wishing to send distress and safety calls.

A second related issue involves a need for more effective methods for
ships and coast stations to call ships using DSC for routine
communications. ITU Radio Regulations effectively prohibit ships and
coast stations from making routine calls to other ships using DSC, and
other alternatives do not exist. Channels are available for ships making
routine calls to coast stations, and these channels should continue to
be used. But ships do not guard these routine calling channels, and so
cannot accept routine calls from coast stations. Simplex HF DSC channels
allowing routine calls from other ships do not exist, and experience has
shown that the number of such calls would be small, and should not
interfere with the distress and safety uses of this channel.

**Proposal:**

**USA/ / 1**

**MOD**

S52.221A Calling on the carrier frequencies 12 290 kHz and 16 420 kHz
~~shall cease as soon as possible and no later than 31 December 2003~~
is permitted only to and from rescue coordination centres (see No.
S30.6.1). The alternative carrier frequencies 12359 kHz and 16 537 kHz
may be used by ship stations and coast stations for calling on a simplex
basis, provided that the peak envelope power does not exceed 1 kW.

**Reasons:** The addition in this footnote permits calling to and from
stations that have search and rescue responsibilities, i.e., rescue
coordination centres. Because of the very limited number of rescue
coordination centres that are, or plan to be, operating in these bands,
the additional traffic and potential for interfering with distress and
safety traffic is very low. Additionally, this allows a vessel in a
distress situation to communicate on these channels rather than making a
distress call on a working channel; hence, de facto changing the working
channel into the distress and safety channel. Monitoring of these two
frequencies at the US Coast Guard Communications Master Stations
Atlantic have shown very little traffic on these channels.

APPENDIX S15

**TABLE S15-1**

Legend:

USA/ / 2

MOD

**DSC     **These frequencies are used exclusively for distress and
safety calls using digital selective calling in accordance with No.
**S32.5** (see Nos. **S32.9**, **S33.11** and **S33.34**).
[Exceptionally, however these frequencies may also be used for
ship-to-ship and shore-to-ship routine calling if no other means are
available and if no traffic is present on the channel (see No.
**S31.4**).]{.underline}

**Reasons**: This will facilitate communications to and from ships that
are outside coverage of VHF radiotelephone frequencies, where no other
means of DSC calling exist. This change includes the requirement to
ensure no communications is present before making a routine call. It
allows DSC-equipped radios to meet the recommendations of IMO that GMDSS
equipment not be reserved for emergency use only, as described in IMO
COMSAR Circ. 17.

DRAFT PROPOSAL FOR THE WORK OF THE CONFERENCE

Included in Doc. WAC/101(04.04.02)

**Agenda Item 1.31**: to consider the additional allocations to the
mobile-satellite service in the 1-3 GHz band, in accordance with
Resolutions 226 (WRC-2000) and 227 (WRC-2000);

**Background Information**: WRC-2000 considered proposals for worldwide
allocation of the band 1 683-1 690 MHz to the mobile-satellite service
(MSS) (Earth-to-space) in response to Resolution **213 (WRC-95)**. The
frequency band 1 675-1 710 MHz is allocated to the MSS (Earth-to-space)
in Region 2 on a co-primary basis. However, the 1 683-1 690 MHz portion
is used mainly by the meteorological-satellite (MetSat) and
meteorological aids (MetAids) services. While there are only a limited
number of MetSat earth stations operating in this band in Region 1,
there are a large number of MetSat earth stations operating in Regions 2
and 3, and the locations of many of these stations are not identified.
Sharing between MetSat and MSS in the band 1 675-1 690 MHz is feasible
only if appropriate separation distances are maintained.

Sharing between MetSat and MSS may not be feasible in those countries
where a large number of MetSat stations are deployed. Recommendation
ITU-R **SA.1158-2** indicates that additional studies are required in
order to determine the criteria for coordination between MSS and the
MetSat service for GVAR/S-VISSR stations operated in the band
1 683-1 690 MHz in Regions 2 and 3.

Other spectrum identified in Resolution **213** included 1 690-1 710
MHz. However, the ITU-R has concluded that co-channel sharing between
MSS and MetAids is not feasible and that co-frequency sharing between
MetAids and MetSat services is not feasible. Therefore, the World
Meteorological Organization (WMO) has identified future spectrum
requirements for MetAids operations as limited to the 1 675-1 683 MHz
portion of the 1 675-1 700 MHz band, but some administrations will
continue to require spectrum in the range 1 683-1 690 MHz for MetAids
operations. [Resolution 227 noted that, due to incompatibility between
MSS and MetSats/MetAids, no further study is required on sharing in the
1 675-1 683 MHz and the 1 690-1 710 MHz bands.]{.underline}

The existing Region 2 allocation includes the provision that MSS
operation should not constrain current and future development of the
MetSat service, as specified in No. **5.377**. No MSS services have been
implemented under the Region 2 allocation in this band.

**Proposal**:

**USA/ /1**

MOD

1 675-1 710 MHz

+----------------------+----------------------+-----------------------+
| Allocation to        |                      |                       |
| services             |                      |                       |
+----------------------+----------------------+-----------------------+
| Region 1             | Region 2             | Region 3              |
+----------------------+----------------------+-----------------------+
| **1 675-1 690**      | **1 675-1 690**      | **1 675-1 690**       |
|                      |                      |                       |
| METEOROLOGICAL AIDS  | METEOROLOGICAL AIDS  | METEOROLOGICAL AIDS   |
|                      |                      |                       |
| FIXED                | FIXED                | FIXED                 |
|                      |                      |                       |
| METEOROLOGICAL-\     | METEOROLOGICAL-\     | METEOROLOGICAL-\      |
| SATELLITE            | SATELLITE            | SATELLITE             |
| (space-to-Earth)     | (space-to-Earth)     | (space-to-Earth)      |
|                      |                      |                       |
| MOBILE except        | MOBILE except        | MOBILE except         |
| aeronautical\        | aeronautical\        | aeronautical\         |
| mobile               | mobile               | mobile                |
|                      |                      |                       |
|                      | ~~MOBILE-SATELLITE\  |                       |
|                      | (Earth-to-space)~~   |                       |
+----------------------+----------------------+-----------------------+
| 5.341                | 5.341 ~~5.377~~      | 5.341                 |
+----------------------+----------------------+-----------------------+
| **1 690-1 700**      | **1 690-1 700**      | **1 690-1 700**       |
|                      |                      |                       |
| METEOROLOGICAL AIDS  | METEOROLOGICAL AIDS  | METEOROLOGICAL AIDS   |
|                      |                      |                       |
| METEOROLOGICAL-\     | METEOROLOGICAL-\     | METEOROLOGICAL-\      |
| SATELLITE            | SATELLITE            | SATELLITE             |
| (space-to-Earth)     | (space-to-Earth)     | (space-to-Earth)      |
|                      |                      |                       |
| Fixed                | ~~MOBILE-SATELLITE\  |                       |
|                      | (Earth-to-space)~~   |                       |
| Mobile except        |                      |                       |
| aeronautical mobile  |                      |                       |
+----------------------+----------------------+-----------------------+
| 5.289 5.341 5.382    | 5.289 5.341          | 5.289 5.341 5.381     |
|                      | ~~5.377~~ 5.381      |                       |
+----------------------+----------------------+-----------------------+
| **1 700-1 710**      | **1 700-1 710**      | **1 700-1 710**       |
|                      |                      |                       |
| FIXED                | FIXED                | FIXED                 |
|                      |                      |                       |
| METE                 | METEOROLOGICAL-\     | METEOROLOGICAL-\      |
| OROLOGICAL-SATELLITE | SATELLITE            | SATELLITE             |
| (space-to-Earth)     | (space-to-Earth)     | (space-to-Earth)      |
|                      |                      |                       |
| MOBILE except        | MOBILE except        | MOBILE except         |
| aeronautical\        | aeronautical\        | aeronautical\         |
| mobile               | mobile               | mobile                |
|                      |                      |                       |
|                      | ~~MOBILE-SATELLITE\  |                       |
|                      | (Earth-to-space)~~   |                       |
+----------------------+----------------------+-----------------------+
| 5.289 5.341          | 5.289 5.341          | 5.289 5.341 5.384     |
|                      | ~~5.377~~            |                       |
+----------------------+----------------------+-----------------------+

**Reasons**: There are no MSS systems operating in this band, and none
are currently planned, due to the incompatibility of MSS and the Metaids
and MetSat services.

USA/ /2

SUP

**5.377**

**Reasons**: Consequential to the deletion of the allocation for MSS.

-FCC-

[^1]: ^\*^ ~~This Resolution was abrogated by WRC-97.~~

[^2]: This proposal only addresses the 26 GHz element of Agenda Item
    1.12c. A separate proposal will address the 15 GHz element of the
    agenda item.