DS-CDMA receiver and forward link diversity method

Details DS-CDMA receiver and forward link diversity method DS-CDMA receiver and forward link diversity method

1997-08-27

1999-07-20

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

375349, 4552761, H04B 1500, H04B 110, H04B 106

Patent

active

059265035

ABSTRACT:
A mobile station (104) in a DS-CDMA communication system (100) has receiver diversity. A first antenna (130) receives signals over a communications channel (101) from a base station (102). A second antenna (132) receives signals which are delayed in a delay element (142) by one or more chip times and combined in a summer (148) with signals from the first antenna. The combined signals are presented to a RAKE receiver (112) for decoding and demodulation. When discernible multipath energy is present to the point where much of the received signal energy is not accounted for in the assigned RAKE receiver fingers, the second antenna is switched out to avoid increasing the level of interference.

REFERENCES:
patent: 4270210 (1981-05-01), Tan et al.
patent: 5109390 (1992-04-01), Gilhousen et al.
patent: 5347535 (1994-09-01), Karasawa et al.
patent: 5513176 (1996-04-01), Dean et al.
patent: 5563610 (1996-10-01), Reudink
patent: 5577265 (1996-11-01), Wheatley, III

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