Receiver

Details Receiver Receiver

1997-12-10

2000-05-23

Pham, Chi H.

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

370320, 375200, H04B 7216, H04B 1500

Patent

active

060672935

ABSTRACT:
A receiver of a CDMA system using a spread spectrum scheme is provided, which, particularly in a case where the RAKE synthesis is performed, stably extracts path timings to be synthesized and realize a reliable RAKE synthesis. Self correlation of a replica of a spreading code is calculated on the side of the receiver and an upper and lower threshold values obtained by incorporating the self correlation value thus calculated in an error range corresponding to a receiving signal quality are used as judge references for judging an output of a searcher circuit. When the output of the searcher circuit is within a range defined by the upper and lower threshold values, it is deemed as an invalid correlation value due to self correlation and, when the output of the searcher circuit is out of the range, it is deemed as effective path timing to be synthesized.

REFERENCES:
patent: 5920554 (1999-07-01), Nakamura et al.
patent: 5953366 (1999-09-01), Naruse et al.
patent: 5953382 (1999-09-01), Asano et al.
patent: 5956367 (1999-09-01), Koo et al.
patent: 5974038 (1999-10-01), Shou et al.

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