# Presentation: 145838

## SPECTRUM

- Sally L. Frodge
- Dept. of Transportation,
- Office of the Assistant Secretary for Transportation Policy
- March 16, 1999

## ISSUES NEEDING IMMEDIATE ATTENTION

- MSS 1:  MSS Out-of-band emission limit
- National/International GMPCS Activities
- Special Rapporteurs Group Meeting
- MSS 2:  MSS Proposal to take GPS spectrum (1559-1567 MHz)
- IMT-2000
- WRC-2000 Preparation & Update
- Ultra Wide Band Radar (1-3 GHz+)
- PSEUDOLITES

## MSS 1:  MSS Out-of-band emission limit

- National Activities
- Open for public comment:  FCC 99-37, IB Docket No. 99-67, RM 9165
- Request for Rule Making (RM) made by NTIA Sep. 1997
- Comment close date:  May 3, 1999
- If you disagree, this may be your last chance to change this, both nationally and internationally
- Also covered in this docket:  Enhanced 911 (E-911) & Global Mobile Personal Communications Systems (GMPCS), ETSI and ITU-R International Standards

## FCC 99-37, IB Docket No. 99-67, RM 9165

- Main topics covered in this docket:
- -70 dBW/MHz for wideband and -80 dBW for narrowband
- this is the allowable energy to be experienced by GPS & GLONASS receivers in the 1559-1610 MHz band *from* the MSS telephones in the 1610 MHz (and above) band
- GPSIC has stated this may cause interference to the operation of GPS receivers and that this limit is not stringent enough
- Others, including the FCC, have stated this limit is enough to protect GPS operations
- Where do you stand?
- The MSS services will be worldwide, ubiquitous services
- the MSS providers (rightfully so) want to sell multitudes of handsets around the world...*not* a limited number of “Mobile Earth Terminals” (i.e. telephones)
- If this standard is not correct, the ramifications will be felt worldwide by civil GPS users

## FCC 99-37, IB Docket No. 99-67, RM 9165... cont’d

- Recall some main facts & assumptions about this emission standard
- It was developed under the auspices of the RTCA, a federal advisory committee to the FAA on aviation issues
- this was an open process, however, the RTCA does (rightfully so) focus on aviation issues
- 100 foot spacing was assumed (between the aircraft and the MSS “Mobile Earth Terminal” (like a cell phone)
- the aircraft is in final approach and landing
- high rate of speed implies the interference is momentary
- the GPS antenna is mounted atop the fuselage
- creates a natural block of interfering signals (from below the fuselage) & is open to the sky
- Do these assumptions work for your application?

## FCC 99-37, IB Docket No. 99-67, RM 9165...cont’d

- Also covered in this docket:  **Enhanced 911 (E-911)**
- Note that the FCC supported the MSS providers in an earlier RM and allowed for certain providers to not place E-911 on all systems
- this was over US Coast Guard objections (based upon the impact to public safety)
- this is another opportunity to promote public safety issues with the FCC
- The Department of Transportation supports E-911 on all services as a *mandatory* requirement to promote and support public safety

## FCC 99-37, IB Docket No. 99-67, RM 9165... cont’d

- If you agree that -70+ should be the permanent worldwide standard for GPS & GLONASS in the 1559-1610 MHz band, state this to the FCC
- If you disagree, this may be your *last chance* to change this
- Comment period closes:  MAY 3, 1999
- Further information can be obtained from the USCG website (*www.navcen.uscg.mil*) under “RNAV SPECTRUM ISSUES”

## -70+ as an International Standard

- Special Rapporteurs Group Meeting -- FCC lead U.S. participating agency
- Held March 8-10, 1999
- Goal was to expand this standard to apply to a wider number and type of terminals
- Goal was to promote this as the international standard
- Domestic debate on this subject is currently being  held in the aforementioned Docket (FCC 99-37) with the FCC

## MSS 2:  MSS Proposal to take GPS Spectrum (1559-1567 MHz)

- Proposal was to reallocate to MSS on a Co-Primary basis the spectrum from 1559-1567 MHz
- this spectrum is used by the GPS signal
- this spectrum is available for future GPS enhancements or augmentations
- e.g., pseudolites to support CAT II/CAT III aviation requirements
- this spectrum (1559-1610 MHz) is the only available to support Global Navigation Satellite Systems (GNSS), according to the International Civil Aviation Organization (ICAO)
- the International Telecommunications Union Working Party 8D (ITU-R WP8D) has stated in the official preparatory documents that sharing between GPS (GNSS) and MSS is *not* feasible

## MSS 2:  MSS Proposal to take GPS Spectrum (1559-1567 MHz)

- This is on the agenda (Agenda Item 1.9 - Resolution 220) for the ITU-R worldwide meeting on spectrum allocation and management, the World Radio Conference 2000 (WRC-2000)
- It must be defeated to assure the future of GNSS, as envisioned by ICAO
- Other civil uses of GPS do not have enough voice within the ITU-R process and must work actively to change this
- The appropriate contact person in your country for the WRC issues is listed on the USCG website under “RNAV SPECTRUM ISSUES”
- Action to take if this is important to you:  Contact this person and let them know the importance of this issue to your organization

## WRC-2000 

- Working Party 8D (WP8D) activities & update
- the last meeting was held March 15, 1999
- all papers going forward in the official WRC-2000 process for WP8D issues were accepted and moved forward or dropped
- next meeting is in Geneva, Switzerland, in April, 1999

## WRC-2000:  Related Issues --IMT-2000

- International Mobile Telecommunications 2000 (IMT-2000)
- one of the highest priority issues for the ITU-R
- this issue has great visibility and support
- IMT-2000 has looked at GPS L1 spectrum as an area of potential spectrum for their requirements
- countries (rightfully so) wish for *sustainable development*
- This can be counterbalanced by noting that GPS:
- provides affordable and sustainable infrastructure that can support sustainable development, state-of-the-art transportation, and other industrial economic benefits

## ULTRA WIDEBAND RADAR

- Open FCC Docket for comment:  ET 98-153 (FCC 98-208) (see www.navcen.uscg.mil “RNAV SPECTRUM ISSUES” for further information)
- Ultra wideband radar exists and is used in a limited capacity
- The spectrum for UWB radar crosses over GPS L5, L2, up past L1
- The FAA has filed comments about the use of UWB radar and potential negative impact on GPS-based systems

## PSEUDOLITES

- Potential for the area of aviation is well understood
- RTCA has a dedicated working group for this
- Potential for other applications is growing -- this is a flexible enabling technology
- e.g. precision/automated farming, mining, use of GPS in visually obstructed areas, less susceptible to interference
- The regulatory process must address pseudolites and spectrum to support them
- Experimental licenses are going forward
- International opportunity for growth & development
- International licensing efforts are increasing
- Spectrum to support the growing area of pseudolite applications needs to be protected, particularly for aviation and safety-of-life

## FURTHER INFORMATION

- General Information:
*www.navcen.uscg.mil “RNAV SPECTRUM ISSUES”*
- Contact Information:
- Sally L. Frodge, Staff Engineer
- U.S. Department of Transportation
- Office of the Assistant Secretary for Transportation Policy
- 400 7th Street, S.W.
- Washington, D.C. 20590-0003
- Tel:  (202) 366-4894
- Fax:  (202) 366-7206 or (202) 366-3393
- email:  Sally.Frodge@ost.dot.gov