System and circuit for estimating the carrier frequency of a PSK

Details System and circuit for estimating the carrier frequency of a PSK System and circuit for estimating the carrier frequency of a PSK

1993-10-01

1996-07-30

Chin, Stephen

Pulse or digital communications

Receivers

Angle modulation

375344, 455257, H04L 2706

Patent

active

055419666

ABSTRACT:
The present invention concerns a system for estimating the carrier frequency of a PSK numeric signal, in which symbols are transmitted at frequency fs. The invention is characterized by the use of an estimate, at each symbol interval, of the angular difference between two successive data. Such estimate, suitably processed, provides the control signal for a circuit that compensates the frequency error between the carrier of the received signal and the local oscillator. In a not limiting embodiment, the invention can be implemented through digital circuitry.

REFERENCES:
patent: 5093846 (1992-03-01), Walton, Jr. et al.
patent: 5128968 (1992-07-01), Yoshida
patent: 5255290 (1993-10-01), Anvari
patent: 5257291 (1993-10-01), Desperben et al.
patent: 5299231 (1994-03-01), Guglielmi et al.
EEE International Conference on Communications ICC '90, Apr. 15-19 1990, Atlanta, GA, vol. 4, pp. 1413-1417, "Carrier Phase Synchronisation for a Coded PSK Signal in Satellite Links" by S. W. Cheung.
International Conference on Mobile Radio Systems and Techniques, Sep. 10-13, 1984, University of York, UK "Digital Implementation of an Experimental Satellite Receiver" by M. P. Baker, et al, pp. 140-144.

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