Importance

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Abstract

To provide a receiver not requiring any large circuit. A carrier-wave-phase-error table 15-1A for BPSK modulation in which a range equal to or more than 0 of I-axis is defined is prepared for a carrier-wave regenerating circuit 10A of a demodulating circuit 1A for orthogonally detecting a received signal in which digital signals according to BPSK, QPSK, and 8PSK modulations are time-multiplexed and outputting I and Q symbol-stream data I.sub.t and Q.sub.t for each symbol. When a remapper 7A outputs I.sub.0t and Q.sub.0t obtained by inversely phase-rotating I.sub.t and Q.sub.t by -.THETA. against a received-signal-phase rotation angle .THETA. and generating an absolute phase of I.sub.t and Q.sub.t, a phase-error detecting circuit 70 obtains a shift angle .THETA.' up to a target phase convergent angle of a received-signal point shown by I.sub.0t and Q.sub.0t viewed in the positive direction of I-axis according to a modulation system currently demodulated, reads phase error data corresponding to I.sub.1t and Q.sub.1t obtained by phase-rotating I.sub.t and Q.sub.t by -(.THETA.+.THETA.') by the remapper 7A through time sharing out of the table 15-1A, and corrects a phase of a reference carrier wave so that the phase error data becomes zero.

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