Communication device and method for determining finger lock stat

Details Communication device and method for determining finger lock stat Communication device and method for determining finger lock stat

1996-05-06

1998-05-19

Ghebretinsae, Temesghen

Pulse or digital communications

Repeaters

Testing

H04B 169

Patent

active

057545839

ABSTRACT:
A communication device (100) includes a plurality of receiver fingers (112, 114, 116) for receiving a spread spectrum communication signal. Each receiver finger includes a received signal strength indication (RSSI) circuit (130). The RSSI circuit (130) includes a filter (135) for filtering a pilot sample signal and producing a filtered signal. A comparator (144) producing a lock indication when the filtered signal exceeds lock threshold. A combiner (118) combines the traffic signal from each receiver finger in response to the lock indication from each finger. The unlock threshold for the finger is reduced to a level above the noise floor of the receiver finger, to reduce the likelihood of a finger unlocking during a fade. Also traffic symbols are immediately combined after a finger assignment using a weighted channel estimate to permit assigning a finger as locked.

REFERENCES:
patent: 5490165 (1996-02-01), Blakeney, II et al.
patent: 5548613 (1996-08-01), Kaku et al.
patent: 5654979 (1997-08-01), Levin et al.

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