FRAME SYNCHRONIZING CIRCUIT, PHASE ERROR CUMULATIVE VALUE DETECTOR, AND DIVERSITY CIRCUIT, AND RECEIVER USING THEM

摘要

PROBLEM TO BE SOLVED: To obtain satisfactory receiving characteristics by solving the problem of level fluctuation or phase rotation caused by phasing in a digital mobile communication system.

SOLUTION: In selecting processing of a branch in the diversity circuit of the receiver, frame synchronism judgment result notice signals 125 and 225 from frame synchronizing parts 118 and 218 of each of branches are investigated and when the frame synchronism judgment results of all the branches show out-of-frame synchronism, the selection of the branch selected up to the moment is maintained and when there is one branch reporting that the frame synchronism judgment result is frame synchronism establishment, selecting processing is performed to select such a branch. By configuring such a diversity circuit, the receiving quality can be improved by the diversity circuit in simple configuration.

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