| 摘要 |
PROBLEM TO BE SOLVED: To provide a wireless signal receiver where its digital demodulator improves an error whose reduction is difficult. SOLUTION: A reception filter 1 applies waveform shaping to a received signal subjected to digital phase modulation and a phase fluctuation extract section 2 extracts a phase fluctuation component. A phase correction signal output section 3 generates a phase correction signal on the basis of phase fluctuations. The received signal through the reception filter 1 is given to a phase correction section 19 via a delay detection section 17 and a delay section 18 of the demodulator 4, where the phase of the signal is corrected by the phase correction signal and the resulting signal is given to a demapping section 20. A demapping section 6 of the phase fluctuation extract section 2 conducts the same processing as that of the demapping section 20 and a mapping section 7 converts an output of the demapping section 6 into a symbol phase to estimate the transmission signal that is digitally modulated. |
