Pulse or digital communications – Repeaters – Testing
Patent
1994-12-16
1997-01-28
Chin, Wellington
Pulse or digital communications
Repeaters
Testing
375347, 380 9, 380 42, 370342, H04K 100, H04B 1500
Patent
active
055984282
ABSTRACT:
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.
REFERENCES:
patent: 4189733 (1980-02-01), Malm
patent: 4608701 (1986-08-01), Burgers et al.
patent: 5031195 (1991-07-01), Chevillat
patent: 5109390 (1992-04-01), Gilhousen et al.
patent: 5193102 (1993-03-01), Meidan et al.
patent: 5343496 (1994-08-01), Honig et al.
patent: 5377266 (1994-12-01), Davis
patent: 5414699 (1995-05-01), Lee
Chin Wellington
Luther William
NEC Corporation
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