Panasonic Partial Proposal Summary for TGn November 2004 doc.: IEEE 802.11-04/1447r0 November 2004 Panasonic Partial Proposal Summary for TGn Refer to 907r2, 908r1 and 956r2 Kiyotaka Kobayashi, Isaac Lim Wei Lih, Naganori Shirakata and Takashi Fukagawa fukagawa.takashi@jp.panasonic.com Panasonic Takashi Fukagawa, Panasonic Takashi Fukagawa, Panasonic

Simple and Significant Enhancement November 2004 [PHY] VIP(Varying Interleave Pattern)-MIMO Different interleaver on each streams When combined with iterative decoding, VIP-MIMO reduces the burst error effects introduced during Viterbi decoding possible to implement VIP in single or paraller encoder/interleaver VIP receiver implementation is vendor dependent - enhanced architectures can realize higher gains but not mandatory Scattered & Staggered Pilots Simple implementation to facilitate MIMO channel tracking - Pilot positions are scattered in every OFDM symbol - Robustness in a frequency selective fading environment - Pilot insertion is staggered in OFDM symbols from different transmit branches - Enables per-tone channel error estimation on each path [MAC] MAC Aggregation MSDUs belongings to the same AC/TSID can be aggregated to form a larger PSDU in order to achieve higher MAC throughput efficiency Support multiple receivers aggregation to achieve higher throughput efficiency A new frame type and subtype is use to identify aggregated data frame. Only modular changes are introduced to existing MAC implementation IFS Reduction Introduce a shorter version of IFS with the use of PHY signaling Increase throughput efficiency when aggregation is NOT possible Simple and Significant Enhancement Takashi Fukagawa, Panasonic