| 摘要 |
A PSK demodulator has two phase detectors for detecting the phase of a PSK signal and a carrier generator for supplying carriers of different phases to the two phase detectors, respectively. The PSK demodulator also includes squaring means for squaring output signals from the two phase detectors, difference computing means for computing the difference between output signals from the squaring means, product computing means for computing the product of the output signals from the two phase detectors, and product detecting means for detecting the product of an output signal from the product computing means and an output signal from the difference computing means, the arrangement being such that the frequencies and phases of the carriers generated by the carrier generator are controlled by an output signal from the product detecting means.
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