Patent ID: 7130593

Claim:
A space diversity receiver comprising: phase shifting means for shifting the phase of a received signal from a first reception route; level detecting means for detecting the level of a combined signal which comprises an output from said phase shifting means and a received signal from a second reception route; distortion detecting means for detecting a waveform distortion of said combined signal; and control means for controlling said phase shifting means depending on an output from said level detecting means and an output from said distortion detecting means, wherein said control means switches alternatively between a control process for maximizing the level of said combined signal (maximum level combining process), a control process for combining the signals in phase with each other (in-phase combining process), and a control process for minimizing said waveform distortion (minimum amplitude deviation type combining process) depending on the output from said level detecting means and the output from said distortion detecting means, and performs said maximum level combining process if said output from said level detecting means is smaller than a predetermined value, wherein said control means performs said minimum amplitude deviation type combining process if said output from said level detecting means is greater than said predetermined value and said output from said distortion detecting means is greater than a first threshold “b”, and wherein said control means performs a control process which performs both said minimum amplitude deviation type combining process and said maximum level combining process if said output from said level detecting means is greater than said predetermined value, said output from said distortion detecting means is smaller than said first threshold “b” and greater than a second threshold “a”, wherein “a” is less than “b”.