Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions
Reexamination Certificate
2007-10-09
2007-10-09
Pham, Chi (Department: 2616)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Particular set of orthogonal functions
C370S536000, C375S146000
Reexamination Certificate
active
10116054
ABSTRACT:
In a transmitter of a wireless communications system having M transmit antennas (10), each transmit antenna is supplied with a respective combined signal comprising a respective one of M groups each of N data sub-streams, orthogonally spread by N Walsh code sequences (W1to WN). The N orthogonal code sequences used for each of the M groups comprise a respective one of M different combinations of N from Nworthogonal code sequences, where Nw>N. M and N are integers greater than one. The combined signals can also include orthogonally spread pilot signals (WP) for channel estimation at a receiver. Orthogonality of the signals transmitted from the transmit antennas is increased, so that transmit signal power can be decreased and/or the receiver can have fewer than M receive antennas.
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Bakouline Mikhail G.
Chloma Alexandre M.
Kreindeline Vitali B.
Shinakov Yuri S.
Tong Wen
Mew Kevin
Pham Chi
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