BLIND ADAPTIVE MULTIUSER RECEIVER

摘要

PROBLEM TO BE SOLVED: To provide a blind adaptive multiuser receiver with transmission path estimation precision improved.

SOLUTION: The receiver comprises a one-shot matched filter 1 for calculating each correlation value of received asynchronous CDMA signals of the number K of users and 2K-1 spread codes equivalent to L and R of a standard user and other users every user symbol cycle T to break down a reception signal into 2K-1 channels; an adaptive decorrelator 2 for multiplying weight matrix to minimize a correlation between channels within a period of time T; a phase compensator 3 for imposing upon the channel a conjugate of a transmission path phase estimated every user; an adaptive controller 4 for calculating a weight matrix W on the basis of the estimated transmission path phase; a data coupler 5 for performing maximum ratio composition with the channels divided into L and R; a code discriminating unit 6 for outputting a user signal estimate to which code discrimination is applied; and a transmission path phase estimator 7 for estimating a transmission path phase included in the asynchronous CDMA signal on the basis of an RLS algorithm with reference to the user signal estimate.

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