Pulse or digital communications – Receivers – Interference or noise reduction
Patent
1998-04-23
2000-11-07
Chin, Stephen
Pulse or digital communications
Receivers
Interference or noise reduction
375231, 370337, H03D 104, H03D 106, H03K 501, H03K 604, H04B 110
Patent
active
061447102
ABSTRACT:
A cellular communication signal receiver receives a desired signal in the presence of at least one co-channel interference signal. The receiver comprises a channel estimator configured to receive a plurality of training signal samples to estimate the finite impulse response to the desired signal and the co-channel interference signal. The finite impulse response estimates having a predetermined number of channel taps defining the length of the desired channel and the length of co-channel interference channel. A Viterbi decoder is coupled to the channel estimator, and configured to receive the desired and co-channel interference signals. The channel estimator generates channel tap estimates. A power calculator is coupled to the channel estimator and configured to estimate the power of the estimated channel taps. A joint channel trimmer is coupled to the power calculator and configured to maintain a joint channel length, such that the desired signal channel length plus the co-channel interference channel length have a fixed size that defines the number of states the Viterbi decoder allocates to the desired signal and the co-channel interference signal.
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Chen Jiunn-Tsair
Chen Young-Kai
Tsai Huan-Shang
Chin Stephen
Lucent Technologies - Inc.
McKiernan Thomas E
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