398 Hart, 22.3.9.2.3 103 5 TR "BF steering matrix Use consistent Brian in 20.3.11.10.1" terminology: e.g. … yet 20.3.11.10.1 both spatial describes both CDD mapping matrix or and Q (called BF steering matrix. "spatial mapping matrix") but not BF steering matrix Proposed resolution: Disagree Discussion: From 11n, mapping” and mapping matrix” are general terms, whereas a BF “spatial “spatial steering matrix is a matrix that improves reception based on some knowledge of the channel.Thus there is a need for two terms and usage in 11ac is unchanged from usage in 11n. 20.3.11.10.1 in 11mb4.01 does describe the Beamforming steering matrix. 402 Hart, Brian 22.3.9.2.3 103 30 TR For clarity, As in comment write "The first and second half of the stream of …" Proposed resolution: Agree in principle Discussion: changes can go further than proposed to maximize clarity Change The stream of 96 complex numbers generated by steps is divided into two groups of 48 complex numbers d_{k,n}, k=0…47, n=0,1 . 404 Hart, Brian 22.3.9.2.4 104 48 TR "replicating it in Remove each 20 MHz "frequency band" sounds like shifting" freq shifting is happening as a byproduct Proposed resolution: Agree in principle Discussion: greater clarity is possible by keeping the language but moving it around. 11n used and frequency shifting and by rotating the upper subcarriers by 90deg”, but this language “duplicating cannot be directly generalized and the repeated is inelegant. The new text does preserve the “and”s in part because in each ...band”is not a proper use of “duplicate”verb, “replicate “replicate”. Change: In 40 and 80 MHz transmissions, the VHT-STF is constructed from the 20 MHz version by frequency shifting, and applying appropriate phase rotations 20MHz sub-band. 407 Hart, 22.3.9.2.4 106 7 TR "QAM mapper QAM mapper => Brian outputs" yet BPSK is constellation an allowed mapper constellation Proposed resolution: Accept
398 Hart, Brian 22.3.9.2.3 103 5 TR "BF steering matrix … in 20.3.11.10.1" yet 20.3.11.10.1 describes both CDD and Q (called "spatial mapping matrix") but not BF steering matrix Use consistent terminology: e.g. both spatial mapping matrix or BF steering matrix. Proposed resolution: Disagree Discussion: From 11n, “spatial mapping” and “spatial mapping matrix” are general terms, whereas a BF steering matrix is a matrix that improves reception based on some knowledge of the channel.Thus there is a need for two terms and usage in 11ac is unchanged from usage in 11n. 20.3.11.10.1 in 11mb4.01 does describe the Beamforming steering matrix. 402 Hart, Brian 22.3.9.2.3 103 30 TR For clarity, write "The first and second half of the stream of …" As in comment Proposed resolution: Agree in principle Discussion: changes can go further than proposed to maximize clarity Change The stream of 96 complex numbers generated by steps is divided into two groups of 48 complex numbers d_{k,n}, k=0…47, n=0,1 . 404 Hart, Brian 22.3.9.2.4 104 48 TR "replicating it in each 20 MHz band" sounds like freq shifting is happening as a byproduct Remove "frequency shifting" Proposed resolution: Agree in principle Discussion: greater clarity is possible by keeping the language but moving it around. 11n used “duplicating and frequency shifting and by rotating the upper subcarriers by 90deg”, but this language cannot be directly generalized and the repeated “and”s is inelegant. The new text does preserve the “duplicate”verb, in part because “replicate in each ...band”is not a proper use of “replicate”. Change: In 40 and 80 MHz transmissions, the VHT-STF is constructed from the 20 MHz version by frequency shifting, and applying appropriate phase rotations 20MHz sub-band. 407 Hart, Brian 22.3.9.2.4 106 7 TR "QAM mapper outputs" yet BPSK is an allowed constellation QAM mapper => constellation mapper Proposed resolution: Accept
11-11-0511-00-00ac-d01-comment-resolution-brianh-part-3.docx