TRANSMIT DIVERSITY AND SPATIAL SPREADING FOR AN OFDM-BASED MULTI-ANTENNA COMMUNICATION SYSTEM
摘要
<p>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 a 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.</p>
申请公布号
WO2005088863(A1)
申请公布日期
2005.09.22
申请号
WO2005US07020
申请日期
2005.03.03
申请人
QUALCOMM INCORPORATED;WALTON, JAY RODNEY;KETCHUM, JOHN W.;WALLACE, MARK S.;HOWARD, STEVEN J.;NANDA, SANJIV
发明人
WALTON, JAY RODNEY;KETCHUM, JOHN W.;WALLACE, MARK S.;HOWARD, STEVEN J.;NANDA, SANJIV