OFDMをベースにしたマルチアンテナ通信システムのための送信ダイバーシティおよび空間拡散

Japanese Patent JP5199202

B2

A multi-antenna transmitting entity transmits data to a single- or multi-antenna receiving entity using (1) a steered mode to direct the data transmission toward the receiving entity or (2) a pseudo-random transmit steering (PRTS) mode to randomize the effective channels observed by the data transmission across the subbands. The PRTS mode may be used to achieve transmit diversity or spatial spreading. For transmit diversity, the transmitting entity uses different pseudo-random steering vectors across the subbands but the same steering vector across an entire packet for each subband. The receiving entity does not need to have knowledge of the pseudo-random steering vectors or perform any special processing. For spatial spreading, the transmitting entity uses different pseudo-random steering vectors across the subbands and different steering vectors across the packet for each subband. Only the transmitting and receiving entities know the steering vectors used for data transmission.

Jai Rodney Walton
John W. Ketchum
Mark S. Wallace
Steven Jay. Howard
Sanjib Nanda

JP2009196706A

May 15, 2013

August 27, 2009

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QUALCOMM INCORPORATED

H04J99/00; H04B7/04; H04B7/06; H04J11/00; H04L1/06; H04L25/02; H04L27/26

WO2004002011A1
US20040002364
WO2003015334A1
WO2003073646A1

Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Tetsuya Kazama
Katsumura Hiro
Shoji Kawai
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen

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