Ds/cdma diversity receiver with despreading filters

Details Ds/cdma diversity receiver with despreading filters Ds/cdma diversity receiver with despreading filters

H - Electricity

04

B

H04B 1/10 (2006.01) H04B 7/02 (2006.01) H04B 7/08 (2006.01) H04B 1/707 (2006.01)

Patent

CA 2138212

A DS/CDMA receiver includes first and second diversity branches each including an antenna, a receiver and a despreading filter. The output signals of the transversal despreading filters of both diversity branches are diversity-combined, and threshold decision is made on the combined signal to produce a decision output. A decision error is detected from the combined signal and the decision output. Interchannel interference is canceled in each despreading filter by controlling their tap weights so that the tap weight coefficient vectors of each filter are orthogonal to all the spread codes of signals from other sources and multipath fading related intersymbol interference is canceled when the decision error of the diversity-combined signal is reduced to a minimum.

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