IEEE P802.11 Wireless LANs Comment Resolutions on the Sync Field Date: 2018-11-13 Author(s): Name Affiliation Address Phone Email Steve Shellhammer Qualcomm shellhammer@ieee.org Abstract The document provides comment resolutions for comments received on the Sync Field, during the first WG letter ballot. The following is the list of CIDs: 164, 188, 197, 198, 302, 670, 671, 672, 673, 674, 675, 926, 927, 928, 929, 1023, 1054, 1214, 1215. Clause 32.2.4.6 Comments CID Clause Page/Line Comment Proposed Change Resolution 188 32.2.4.6 75.34 Need to add per chain CSD to the generation of WUR SYNC and data as in the comment Revise TGba Editor changes as shown in Discussion The Symbol Randomization and per-Antenna CSD is embedded in the Waveform Generation (Step c), and the Waveform Generation includes adding the GI, so it is necessary for the CSD to be within the Waveform Generation and not a subsequent set. 32.2.4.6 Construction of the WUR-Sync for a single 20 MHz channel Construct the WUR-Sync filed for a single 20MHz channel defined in 32.2.8.3 (WUR SYNC field) as follows: a) Set the WUR_DATARATE from the WUR_TXVECTOR. b) Sync-bit sequence generation: Generate the Sync-bit sequence according to the WUR_DATARATE as described in 32.2.8.3 (WUR SYNC field). c) Waveform generation: Generate the MC-OOK waveform by using either On-WG or Off-WG according to the Sync-bit. Sync-bit duration TSync is 2 µs.
e) Windowing: Apply windowing. f) Analog and RF: Upconvert the resulting complex baseband waveform associated with each transmit chain to an RF signal according to the center frequency of the desired channel and transmit. CID Clause Page/Line Comment Proposed Change Resolution 1023 32.2.4.6 75.23 "Construct the filed ..." "filed" should be "field". As in comment. Accept CID Clause Page/Line Comment Proposed Change Resolution 1054 32.2.4.6 75.30 In the following sentence, it is not clear if the On-WG corresponds to LDR On-WG or HDR On-WG: "Generate the MC-OOK waveform by using either On-WG or according to the Since the Sync bit duration is 2 usec, it can be explicitly mentioned here that the corresponds to HDR. Replace On-WG in the sentence with HDR On-WG. As shown in the comment. Reject The sentence states that the 2 us On-WG/Off-WG is used for the Sync Field. Though this is the same duration as the HDR Data Field bits, it is not the “HDR On-WG”. Clause 32.2.8.3.3 Comments CID Clause Page/Line Comment Proposed Change Resolution 164 32.2.8.3.3 83.12 What is the waveform the sync field? How are the values of W convert to a time domain signal Show a waveform with the values of W detailing the modulation Revised TGba Editor makes changes as shown in 802.11-18/1898r2 CID Clause Page/Line Comment Proposed Change Resolution 302 32.2.8.3.3 86.65 The sentence "The OOK symbol modulates the OFDM symbol" is ambiguous. Also, there seems to be confusion here what the OOK symbol is. In this paragraph it seems to be an element of the vector W, whereas in Annex AB the OOK symbol is the Replace by less ambiguous language. When the OOK symbol is one, the OFDM waveform is transmitted. When the OOK symbol is 0, no energy is transmitted. Also specify which OFDM symbol is meant (HDR Revised TGba Editor changes as shown in
sequence has duration 2 ╬╝s, and W is defined in Equation (32-4).". This is descriptive text. It should be normative, otherwise the sync field is not specified. the 32-bit sequence W, where each bit in the sequence has duration 2 ╬╝s, and W is defined in Equation (32-4)." (See also my previous comment where it is suggested to change "OOK" to "MC-OOK") CID Clause Page/Line Comment Proposed Change Resolution 675 32.2.8.3.4 83.32 The text reads "The OOK symbol modulates the OFDM symbol". There is no support for this statement in the spec. Remove the sentence Accept CID Clause Page/Line Comment Proposed Change Resolution 928 32.2.8.3.4 83.22 "... as a multicarrier Keying (MC-OOK) signal ...", the acronym (MC-OOK) is already defined at the beginning of Section 32. Directly use here. Revised The sentence was changed to refer to the Sync-bit sequence and so “OOK” is no longer applicable. CID Clause Page/Line Comment Proposed Change Resolution 929 32.2.8.3.4 83.33 "The OOK symbol modulates the OFDM symbol", not sure what information is this sentence trying to deliver? Either delete the sentence or rephrase Accept CID Clause Page/Line Comment Proposed Change Resolution 1215 32.2.8.3.4 83.23 W should be in bold/italic letter to indicate vector in Equation (32-5). as in comment Revised TGba Editor to put “W” in italics