When reception of multiplexed PSK modulated waves BPSK and 8PSK starts, a selector ( 16 C) of a demodulation circuit (IC) read higher-order three bits ΔΦ( 3 ) of the phase error data corresponding to outputs I′ and Q′ of a remapper ( 7 ) for performing absolute phasing from a phase error table for BPSK out of tables provided for respective types of modulation methods. A reception signal phase rotation angle detection circuit ( 8 C) detects the phase rotation angle corresponding to a bit “1” of a frame sync signal of a received symbol stream from ΔΦ( 3 ) and the MSB of the output I′ of the remapper ( 7 ) and outputs the phase rotation angle to the remapper ( 7 ) to allow the remapper ( 7 ) to perform absolute phasing. The selector ( 16 C) reads phase error data corresponding to the received symbol data after absolute phasing output from the remapper ( 7 ) from the phase error table corresponding to the modulating method identified by a transmission configuration identification circuit ( 9 ), outputs the phase error data to a D/A converter ( 17 ), corrects the phase of carrier waves for orthogonal detection, and causes the difference in phase between the received signal point and the transmission signal point to be constant.
1. A receiver comprising: a demodulation means for demodulating a PSK modulated signal of digital signals modulated by a plurality of different PSK modulation methods (e.g. BPSK. QPSK. 8PSK) having different numbers of phases and multiplexed in time, by using carriers (f c1 and f c2 ) reproduced by carrier reproduction means, and outputting I and Q symbol stream data (I( 8 ), Q( 8 )); a reception signal phase rotation angle detection means for detecting a phase rotation angle relative to a transmission side of the I and Q symbol stream data output from said demodulation means; and an inverse phase rotation means ( 7 ) for inversely rotating a phase of the I and Q symbol stream data output from said demodulation means by a phase rotation angle (OR( 3 )) detected by said reception signal phase rotation angle detection means, thereby performing absolute phasing, wherein the carrier reproduction means of said reproduction means has phase error tables ( 13 , 14 - 1 , 15 - 1 ) for respective ones of the plurality of PSK modulation methods, the tables storing carrier phase error data for various demodulated I and Q symbol stream data pairs, and while said demodulation means demodulates a reception signal corresponding to a specific one of the PSK modulation methods, phase error data (ΔΦ( 8 )) corresponding to the demodulated I and Q symbol stream data is read from the phase error table corresponding to the specific modulation method to correct the phase of the carriers, the receiver being characterized in that:
while said demodulation means ( 1 C, 1 D) demodulates the reception signal corresponding to the specific one of the PSK modulation methods, the carrier reproduction means ( 10 C, 10 D) reads the phase error data corresponding to demodulated I and Q symbol stream data (I′( 8 ), Q′( 8 )) after absolute phasing output from said inverse phase rotation means ( 7 ) from the phase error table corresponding to the specific modulation method to correct the phase of the carriers using the read phase error data.
2. A receiver comprising: a demodulation means for demodulating a PSK modulated signal of digital signals modulated by a plurality of different PSK modulation methods (e.g., BPSK, QPSK, 8PSK) having different numbers of phases and multiplexed in time, by using carriers (f c1 and f c2 ) reproduced by carrier reproduction means, and outputting I and Q symbol stream data (I( 8 ), Q( 8 )); a reception signal phase rotation angle detection means for detecting a phase rotation angle relative to a transmission side of the I and Q symbol stream data output from said demodulation means; and an inverse phase rotation means ( 7 ) for inversely rotating a phase of the I and Q symbol stream data output from said demodulation means by a phase rotation angle (OR( 3 )) detected by said reception signal phase rotation angle detection means, thereby performing absolute phasing, wherein the carrier reproduction means of said reproduction means has phase error tables ( 13 , 14 - 1 , 15 - 1 ) for respective ones of the plurality of PSK modulation methods, the tables storing carrier phase error data for various demodulated I and Q symbol stream data pairs, and while said demodulation means demodulates a reception signal corresponding to a specific one of the PSK modulation methods, phase error data (ΔΦ( 8 )) corresponding to the demodulated I and Q symbol stream data is read from the phase error table corresponding to the specific modulation method to correct the phase of the carriers, the receiver being characterized in that:
while said demodulation means ( 1 E, 1 F) demodulates the reception signal corresponding to the specific one of the PSK modulation methods, the carrier reproduction means ( 10 C, 10 D) reads the phase error data corresponding to demodulated I and Q symbol stream data (I′( 8 ), Q′( 8 )) after absolute phasing output from said inverse phase rotation means ( 7 ) and the phase error data corresponding to a selected one of either the I or Q symbol stream data (I( 8 ) or (Q( 8 )) output from said demodulation means, from the phase error table corresponding to the specific modulation method to correct the phase of the carriers using the read phase error data.