Circuit for demodulating psk modulated signal by...

Details Circuit for demodulating psk modulated signal by... Circuit for demodulating psk modulated signal by...

H - Electricity

03

D

329/11

H03D 3/00 (2006.01) H04L 27/233 (2006.01) H04L 27/00 (2006.01)

Patent

CA 2038920

ABSTRACT OF THE DISCLOSURE In a demodulator circuit which is simple in construction, a PSK modulated signal is converted in frequency into a quasi- base band signal and is then subjected to complex separation. Partly since a phase angle sampled from a digital complex signal is supplied to a differential-detector circuit, and partly since the differential-detector circuit processes only the phase angle, the differential-detector circuit has a simple construction. As the detected phase difference between two successive symbol data, an error between a carrier wave contained in the modulated signal and a locally oscillated frequency on the receiving side is compensated and is output- ted as a digital demodulated signal.

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