IEEE P802.11 Wireless LANs Comment resolution on Space-Time Block Coding Date: 2017-01-15 Author(s): Name Affiliation Address Phone email Thomas thomas.handte @ Sony Europe Ltd. Heldelfinger Strasse 61 +49 711 5858 236 Handte sony.com Dana dana.ciochina @ Sony Europe Ltd. Ciochina sony.com Comments CID Clause Comment Proposed Change 1617 30.5.9.5.3 Space-time block coding is limited to one spatial comment resolution will be stream only. It can be beneficial to generalize to provided more spatial streams 2029 30.5.3.1 The text is too restrictive as STBC can be applied to Relax the text and complete the multple spatial streams STBC descritption 2030 30.5.3.3.2 STBC can be applied to multiple spatial streams, Replace "single" with "each" and thus the description: if stbc is applied, a single complete the multiple STBC spatial stream is mapped to 2 space time streams is description for the SU-MIMO case too restrictive. 2034 30.6.2.1 OFDM mode should multiple STBC with Please extend to N_ss>=1 multiple spatial streams Discussion Commenters propose to extend current 11ay STBC encoding to multiple streams for SC (1617, 2029, 2030) and OFDM (2034). Motivation STBC can exploit MIMO features of AP in asymmetric MIMO APs typically have more MIMO features than STAs STBC provides transmit diversity in this case which can be used to increase throughput, i.e. higher channel gain, higher modulation order provide redundancy, i.e. more robust communication in case of shadowing or blockage As of today, 11ay STBC encoding is limited to a single spatial stream (NSS=1) Benefits of STBC in MIMO are too versatile to be limited to a single spatial stream STBC in CA is not possible as even NSS is prerequisite Often effective channels can get block diagonal i.e. channels have this structure means negligible interference each can either be occupied or be block diagonal matrix Appropriate beamforming and/or reordering (spatial mapping) may be required to achieve block diagonal shape diagonalization can even be an objective function for beamforming
IEEE P802.11 Wireless LANs Comment resolution on Space-Time Block Coding Date: 2017-01-15 Author(s): Name Affiliation Address Phone email Thomas Handte Sony Europe Ltd. Heldelfinger Strasse 61 +49 711 5858 236 thomas.handte @ sony.com Dana Ciochina Sony Europe Ltd. dana.ciochina @ sony.com Comments CID Clause Comment Proposed Change 1617 30.5.9.5.3 Space-time block coding is limited to one spatial stream only. It can be beneficial to generalize to more spatial streams comment resolution will be provided 2029 30.5.3.1 The text is too restrictive as STBC can be applied to multple spatial streams Relax the text and complete the STBC descritption 2030 30.5.3.3.2 STBC can be applied to multiple spatial streams, thus the description: if stbc is applied, a single spatial stream is mapped to 2 space time streams is too restrictive. Replace "single" with "each" and complete the multiple STBC description for the SU-MIMO case 2034 30.6.2.1 OFDM mode should multiple STBC with multiple spatial streams Please extend to N_ss>=1 Discussion Commenters propose to extend current 11ay STBC encoding to multiple streams for SC (1617, 2029, 2030) and OFDM (2034). Motivation STBC can exploit MIMO features of AP in asymmetric MIMO APs typically have more MIMO features than STAs STBC provides transmit diversity in this case which can be used to increase throughput, i.e. higher channel gain, higher modulation order provide redundancy, i.e. more robust communication in case of shadowing or blockage As of today, 11ay STBC encoding is limited to a single spatial stream (NSS=1) Benefits of STBC in MIMO are too versatile to be limited to a single spatial stream STBC in CA is not possible as even NSS is prerequisite Often effective channels can get block diagonal i.e. channels have this structure means negligible interference each can either be occupied or be block diagonal matrix Appropriate beamforming and/or reordering (spatial mapping) may be required to achieve block diagonal shape diagonalization can even be an objective function for beamforming
11-18-0186-01-00ay-cr-on-space-time-block-coding.docx