Coherent phase shift keyed demodulator

Details Coherent phase shift keyed demodulator Coherent phase shift keyed demodulator

H - Electricity

03

D

329/3

H03D 3/00 (2006.01) H04L 27/227 (2006.01)

Patent

CA 2000007

A demodulator mechanism which uses estimates of the in-phase and quadrature-phase components or differential phase modulated carrier signals for performing a coherent demodulation of these signals is described. The instantaneous estimates, obtained from an estimator circuit, are fed into a differential carrier recovery circuit, which provides for a feedback of ideal sine and cosine components, and combined with the instantaneous estimates for incrementally decreasing a phase error signal generated in a computational circuit. By thus incrementally decreasing the phase error signal, an ideal phase angle is eventually obtained, thereby providing for coherent demodulated output components of the input carrier signals.

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