Pulse or digital communications – Receivers – Interference or noise reduction
Patent
1996-08-12
1998-10-13
Chan, Jason
Pulse or digital communications
Receivers
Interference or noise reduction
375254, 375285, 455303, H04B 710, H04L 102
Patent
active
058223800
ABSTRACT:
An apparatus for estimating channel tap coefficients of a communication channel is provided which calculates channel tap coefficient estimates as a function of a received sample stream corresponding to the channel whose channel taps are being estimated and as a function of at least one other received sample stream corresponding to another receive channel. The apparatus receives digital sample streams from a plurality of receive channels and an impairment correlation matrix containing impairment correlation information among multiple receive channels. In one embodiment, the apparatus includes a precombiner which forms linear combinations of initial error samples from a first received sample stream and a second received sample stream to generate refined error samples for generating channel tap coefficient estimates. In one embodiment, an impairment correlation estimator receives the complex samples and the channel tap coefficients and generates an impairment correlation matrix for multiple receive channels. In one embodiment, a detector receives the complex samples, channel tap coefficients and the impairment correlation among multiple receive channels, and detects the transmitted information symbols. In one embodiment, the apparatus comprises a Kalman filter.
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Chan Jason
Corrielus Jean B.
Ericsson Inc.
Hall David C.
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