BS digital broadcast receiver

A BS digital broadcast receiver for receiving a Trellis 8PSK modulation signal, comprising:

• phase error data generating means for generating phase error data in accordance with a phase difference between 0 degree and a phase of a reception signal point position of an absolute-phased baseband demodulation signal, in order to reproduce a carrier;
• a Viterbi decoder for Viterbi-decoding a QPSK baseband signal based upon the reception signal point position of the absolute-phased baseband demodulation signal;
• an encoder for convolution-encoding a Viterbi decode output;
• delay means for delaying a predetermined number of upper bits of the phase error data corresponding to the phase difference between 0 degree and the phase of the reception signal point position of the absolute-phased baseband demodulation signal, by a total sum of a time taken by said Viterbi decoder to Viterbi-decode and a time taken by said convolution encoder to convolution-encode;
• a demapping conversion circuit for demapping outputs from said delay means;
• and
• an MSB code judging circuit for outputting a code determined from an output of said demapping conversion circuit and a convolution encode output, as an MSB of a Trellis 8PSK decode output.