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Patent Searching and Data


Title:
RECEIVER AND DEMODULATOR APPLIED TO MOBILE COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2000/031909
Kind Code:
A1
Abstract:
A receiver applicable to a mobile communication system, whose circuit scale is small. Each of a plurality of fingers has a phase estimating unit, and determines a phase estimation value on the basis of a demodulation signal from a despreading unit. The phase estimation value is supplied to a compensation coefficient computing unit via an I/O unit. On the basis of the phase estimation value, the compensation coefficient computing unit determines a weight/phase compensation coefficient which realizes both weight control and phase compensation control. Each of the fingers has a phase compensating unit, which multiplies a delay-compensated demodulation signal by the determined weight/phase compensation coefficient. As a result, weight control and phase compensation are simultaneously achieved. The circuit scale is small compared with that of a receiver where the weight control and the phase compensation control are performed by different circuits.

Inventors:
Tanaka, Toyohisa (Mitsubishi Denki Kabushiki Kaisha 2-3, Marunouchi 2-chome Chiyoda-ku Tokyo, 100-8310, JP)
Application Number:
PCT/JP1998/005215
Publication Date:
June 02, 2000
Filing Date:
November 19, 1998
Export Citation:
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Assignee:
MITSUBISHI DENKI KABUSHIKI KAISHA (2-3 Marunouchi 2-chome Chiyoda-ku Tokyo, 100-8310, JP)
Tanaka, Toyohisa (Mitsubishi Denki Kabushiki Kaisha 2-3, Marunouchi 2-chome Chiyoda-ku Tokyo, 100-8310, JP)
International Classes:
H04B1/707; H04B1/712; H04B7/08; H04J13/00; (IPC1-7): H04J13/00
Foreign References:
JPH0290743A1990-03-30
JPH0974372A1997-03-18
Other References:
See also references of EP 1054523A4
Attorney, Agent or Firm:
Miyata, Kaneo (Mitsubishi Denki Kabushiki Kaisha 2-3, Marunouchi 2-chome Chiyoda-ku Tokyo, 100-8310, JP)
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