CDMA receiver, and path management method and path...

Multiplex communications – Communication over free space

Reexamination Certificate

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C370S342000

Reexamination Certificate

active

10807203

ABSTRACT:
A CDMA receiver capable of reducing path search processing time. A CDMA receiver comprises a path search section for specifying finger allocation according to delay profiles of respective branch signals received from base stations, a plurality of fingers which are allocated to the branch signals based on the finger allocation specified by the path search section, and a rake receiving section for maximal-ratio-combining the power of a plurality of signals obtained from the fingers, which have been distributed due to their respective delays. The path search section includes a path management section to search for paths in response to the branch signals, and stores detected path information in a detected path table storing area in a memory. The number of paths which the path management section searches for is changed according to the number of received branch signals. Thereby, the processing time for a path search on the occasion when the number of branches has increased can be shortened. Consequently, the CDMA receiver consumes lower amounts of power.

REFERENCES:
patent: 2001/0028677 (2001-10-01), Wang et al.
patent: 2003/0026233 (2003-02-01), Ohsuge
patent: HEI9-181704 (1997-07-01), None
patent: 2002-141835 (2002-05-01), None
patent: 2003-23671 (2003-01-01), None
patent: 2003-158504 (2003-05-01), None
Wang et al., “Generalized Rake Reception for Cancelling Interference From Multiple Base Stations”, VTC 2000-Fall, IEEE VTS 52nd, Vehicular Technology Conference, New York, NY, U.S.A., vol. 5 of 6, pp. 2333-2339, Conference 52.
Mitsugi et al., Path-search algorithm introducing path-management tables for DS-CDMA mobile terminal, 13th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2002, Proceedings (Cat No. 02TH8637), Proceedings of the 13th IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC 20020, PAVILH, Piscataway, NJ, U.S.A., vol. 2, pp. 730-734 (2002).
Japanese Office Action dated Jan. 18, 2005 (and English translation of relevant portion).

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