Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2011-01-11
2011-01-11
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S150000, C375S130000, C375S233000, C375S141000, C375S267000
Reexamination Certificate
active
07869546
ABSTRACT:
A symbol sequence contained in a received signal comprising a cyclic convolution of a Walsh code multiplexed signal and a channel impulse response of a multipath channel is detected using Walsh Hadamard domain equalization techniques. The method comprises converting the received signal and the channel impulse response of the multipath channel from the time domain to the WHT domain, and determining the symbol sequence based on equalizing the received signal in the WHT domain using WHT spectra of the channel impulse response to remove inter-symbol interference from the received signal due to cross-correlation between Walsh codes.
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Coats & Bennett P.L.L.C.
Liu Shuwang
Patel Dhaval
Telefonaktiebolaget LM Ericsson (publ)
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