| 摘要 |
In a demodulator for demodulating a BPSK modulated signal, demodulation performance degradation caused by analog circuits such as fabrication variation is suppressed, and furthermore, frequency variation in the BPSK modulated signal is followed by the demodulator. A multiplication circuit 105 multiplies a carrier, generated from a BPSK modulated signal by a carrier information extraction circuit 101 and a carrier generation circuit 102 , by a digital BPSK modulated signal obtained by digitizing the BPSK modulated signal by an A/D converter 104 via a LPF 103 . A carrier period integration circuit 106 integrates the multiplication result with respect to the period of the carrier, and the integration result is then binarized in a discriminator 107 , thereby realizing demodulation.
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