Demodulation circuit for CDMA mobile communications and...

Details Demodulation circuit for CDMA mobile communications and... Demodulation circuit for CDMA mobile communications and...

2005-12-20

2005-12-20

Tran, Khai (Department: 2637)

Pulse or digital communications

Spread spectrum

Direct sequence

C370S342000

Reexamination Certificate

active

06977955

ABSTRACT:
A demodulation circuit for CDMA mobile communications systems includes a path comparison portion that detects whether one and the same path has been successively detected or not, and a calculation portion that calculates the timing variation between currently detected path and previously detected path when one and the same path is detected successively. A path timing determination portion assigns a new path to the finger portion in place of a path with a maximum variation if the variation of the path with a maximum variation within the paths already assigned to the finger portion has the variation larger than/equal to a variation threshold when a new path which is not assigned to the finger portion and of which level is higher than/equal to a predetermined assignment threshold is detected.

REFERENCES:
patent: 6178193 (2001-01-01), Kondo
patent: 6498928 (2002-12-01), Hiramatsu
patent: 6795422 (2004-09-01), Ohsuge
patent: 2001/0009562 (2001-07-01), Ohno
patent: 2002/0181561 (2002-12-01), Sano
patent: 1 148 657 (2001-10-01), None

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