Communication system with receivers employing generalized...

Details Communication system with receivers employing generalized... Communication system with receivers employing generalized...

2008-06-09

2009-06-09

Tse, Young T. (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S260000

Reexamination Certificate

active

07545851

ABSTRACT:
A wireless transmit/receive unit (WTRU) is configure to receive and sample wireless signals in a shared spectrum where the wireless signal comprise encoded symbols. The WTRU has a channel estimation device configured to process received signal samples to produce an estimate of a channel response of the received signals corresponding to a matrix H. The channel estimation device is preferably configured to process the received signal samples to produce an estimate of noise variance of the received signals. The WTRU preferably has a two stage data estimator that includes a channel equalizer and a despreader. The channel equalizer is configured to process received signal samples using the estimated channel response matrix H and the estimate of noise variance to produce a spread signal estimate of the received signals. The despreader is configured to process the spread signal estimate of the received signals produced by said channel equalizer to recover encoded symbols of the received signals.

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