Method and device for detecting the error on the frequency of a

Details Method and device for detecting the error on the frequency of a Method and device for detecting the error on the frequency of a

1997-09-22

1999-09-14

Chan, Jason

Pulse or digital communications

Synchronizers

375340, 375325, 371 21, 371 471, H04L 700

Patent

active

059533854

ABSTRACT:
In order to detect the error on the frequency of an M-PSK phase-modulated carrier, the phase .psi.(n) of the samples is restored to the interval d(n)=mod(.phi.(n)-.phi.(n-1), 2.pi./M) is calculated; p'(n)=mod(d(n)+p(n-1), 2.pi./M) is calculated, where p(n)=mod(p*(n), 2.pi./M), where p*(n) is obtained by subtracting the current output from p'(n); d'(n)=p'(n)-p(n-1) is calculated; a parameter "tri" is defined by tri=1 if .vertline.d'(n).vertline.<S and tri=.beta. if .vertline.d'(n).vertline..gtoreq.S, where S is a threshold; det.sub.-- tri(n)=.alpha..p'(n).tri is calculated, det.sub.-- tri(n) constituting the current output, representative of the error on the frequency of the carrier.

REFERENCES:
patent: 4773085 (1988-09-01), Cordell
patent: 5031197 (1991-07-01), Hespelt et al.
patent: 5062123 (1991-10-01), Geile et al.
patent: 5157694 (1992-10-01), Iwasaki et al.
patent: 5157698 (1992-10-01), Hespelt et al.
patent: 5373247 (1994-12-01), Furukawa et al.
patent: 5619167 (1997-04-01), Adachi
patent: 5727027 (1998-03-01), Tsuda
IEEE International Conference on Communications, Philadelphia, vol. 2, Jun. 12-15, 1988, Institute of Electrical and Electronics Engineers, pp. 1012-1016, XP000012468 Haeb R. et al. : "A Digital Synchronizer For Linearly Modulated Signals Transmitted Over A Frequency-Nonselective Fading Channel" * section V * * figure 4 *.
International Search Report dated Jun. 4, 1997, French Appl. FR 9611554.

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