Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions
Reexamination Certificate
2006-02-21
2006-02-21
Ngo, Ricky (Department: 2663)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Particular set of orthogonal functions
Reexamination Certificate
active
07002900
ABSTRACT:
For transmit diversity in a multi-antenna OFDM system, a transmitter encodes, interleaves, and symbol maps traffic data to obtain data symbols. The transmitter processes each pair of data symbols to obtain two pairs of transmit symbols for transmission from a pair of antennas either (1) in two OFDM symbol periods for space-time transmit diversity or (2) on two subbands for space-frequency transmit diversity. NT·(NT−1)/2 different antenna pairs are used for data transmission, with different antenna pairs being used for adjacent subbands, where NTis the number of antennas. The system may support multiple OFDM symbol sizes. The same coding, interleaving, and modulation schemes are used for different OFDM symbol sizes to simplify the transmitter and receiver processing. The transmitter performs OFDM modulation on the transmit symbol stream for each antenna in accordance with the selected OFDM symbol size. The receiver performs the complementary processing.
REFERENCES:
patent: 2003/0060173 (2003-03-01), Lee et al.
patent: 2003/0112745 (2003-06-01), Zhuang et al.
patent: 2003/0123381 (2003-07-01), Zhuang et al.
patent: 2003/0128658 (2003-07-01), Walton et al.
patent: 2003/0235147 (2003-12-01), Walton et al.
patent: 1 185 001 (2002-03-01), None
patent: 1 241 824 (2002-09-01), None
Li Lihua et al., “A Practical Space-Frequency Block Coded OFDM Scheme for Fast Fading Broadband Channels,” 13thIEEE International Symposium On Personal Indoor and Mobile Radio Communications, vol. 1, Sep. 15, 2002, pp. 212-216.
Howard Steven J.
Ketchum John W.
Wallace Mark S.
Walton J. Rodney
(Micky) Minhas Sandip S.
Duong Duc
Milikovsky Dmitry
Ngo Ricky
QUALCOMM Incorporated
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