Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2011-03-15
2011-03-15
Ghebretinsae, Temesghen (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S267000, C375S147000, C375S316000
Reexamination Certificate
active
07907689
ABSTRACT:
An access point in a multi-antenna system broadcasts data using spatial spreading to randomize an “effective” channel observed by each user terminal for each block of data symbols broadcast by the access point. At the access point, data is coded, interleaved, and modulated to obtain NDdata symbol blocks to be broadcast in NMtransmission spans, where ND≧1 and NM>1. The NDdata symbol blocks are partitioned into NMdata symbol subblocks, one subblock for each transmission span. A steering matrix is selected (e.g., in a deterministic or pseudo-random manner from among a set of L steering matrices) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols, which are further processed and broadcast via NTtransmit antennas and in one transmission span to user terminals within a broadcast coverage area.
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Howard Steven J.
Ketchum John W.
Wallace Mark S.
Walton J. Rodney
Franks Ross L.
Ghebretinsae Temesghen
Qualcomm Incorporated
Qualcomm Patent Group
Yancey, Jr. James Hunt
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