Figure 19-2 for non-HT portion of HT PPDU Figure 19-3 for HT portion of HT PPDU Section 22.3.4 mentions that the pilot insertion functions are included in other blocks. For example, in block does include pilot insertion function. “IDFT” 22.3.4.3 Construction of L-SIG IDFT: Insert pilots. ...” “e) Therefore, it should not be added pilot insertion blocks on Figures 22-2 through Figure 22-7 for consistency between the block diagrams of VHT packets and ones of non-HT or HT packets. Proposed response to CID 2913: Disagree. Comments for 80+80MHz transmit block diagram (CID 2369, ) 2054 Asai, 22.3.3 123 26 T This diagram suggests that Please add some notes. Agree in PHY Yusuke two analog and RF blocks principle: are used to generate See single 80+80 MHz spatial resolution streams, but the in configuration of 11/1009r0. transmitter is implementation dependent. 2055 Asai, 22.3.3 123 26 T This diagram may cause Add a coupler block to Agree in PHY Yusuke misunderstanding that a merge two RF signals of principle: STA should have two frequency segments per See antennas per single 80+80 80+80 MHz spatial stream. resolution MHz spatial stream in because there are two RF 11/1009r0. chains per single 80+80 MHz spatial stream. 2056 Asai, 22.3.3 123 32 E Add "…" between the As in comment. Accept: (Ed) Yusuke arrows of the inputs of See 2nd and 3rd IDFT blocks. resolution in 11/1009r0. Discussion: (CID 2054, 2055) Current Figure 22-7 shows one of the most typical implementation examples of 80+80 MHz transmitter because of the following reasons: In 80+80 MHz non-contiguous transmission, the channel center frequency difference between two frequency segments depends on the condition of available channels. To use an RF block per frequency segment, it is quite easy to adjust each frequency segment on any channel number. The configuration of two RF blocks per spatial stream limits that maximum bandwidth of each frequency segment to 80 MHz. It will reduce the cost of analog RF blocks. If single RF block per spatial stream is used, each RF block must support at least 320 MHz of bandwidth because minimum
Figure 19-2 for non-HT portion of HT PPDU Figure 19-3 for HT portion of HT PPDU Section 22.3.4 mentions that the pilot insertion functions are included in other blocks. For example, in “IDFT” block does include pilot insertion function. 22.3.4.3 Construction of L-SIG “e) IDFT: Insert pilots. ...” Therefore, it should not be added pilot insertion blocks on Figures 22-2 through Figure 22-7 for consistency between the block diagrams of VHT packets and ones of non-HT or HT packets. Proposed response to CID 2913: Disagree. Comments for 80+80MHz transmit block diagram (CID 2369, ) 2054 Asai, Yusuke 22.3.3 123 26 T This diagram suggests that two analog and RF blocks are used to generate single 80+80 MHz spatial streams, but the configuration of transmitter is implementation dependent. Please add some notes. Agree in principle: See resolution in 11/1009r0. PHY 2055 Asai, Yusuke 22.3.3 123 26 T This diagram may cause misunderstanding that a STA should have two antennas per single 80+80 MHz spatial stream because there are two RF chains per single 80+80 MHz spatial stream. Add a coupler block to merge two RF signals of frequency segments per 80+80 MHz spatial stream. Agree in principle: See resolution in 11/1009r0. PHY 2056 Asai, Yusuke 22.3.3 123 32 E Add "…" between the arrows of the inputs of 2nd and 3rd IDFT blocks. As in comment. Accept: See resolution in 11/1009r0. (Ed) Discussion: (CID 2054, 2055) Current Figure 22-7 shows one of the most typical implementation examples of 80+80 MHz transmitter because of the following reasons: In 80+80 MHz non-contiguous transmission, the channel center frequency difference between two frequency segments depends on the condition of available channels. To use an RF block per frequency segment, it is quite easy to adjust each frequency segment on any channel number. The configuration of two RF blocks per spatial stream limits that maximum bandwidth of each frequency segment to 80 MHz. It will reduce the cost of analog RF blocks. If single RF block per spatial stream is used, each RF block must support at least 320 MHz of bandwidth because minimum