Timing recovery device for receiver installation using adaptive

Details Timing recovery device for receiver installation using adaptive Timing recovery device for receiver installation using adaptive

1992-12-09

1994-02-08

Chin, Stephen

Pulse or digital communications

Spread spectrum

Direct sequence

375 84, 375100, H04L 700

Patent

active

052854825

ABSTRACT:
A timing recovery device for receiver installations using oversampling and adaptive equalization in association with differentially coherent demodulation, applicable in particular to receivers operating in diversity mode, derives a transition coding signal from the output signal of the adaptive equalizer. Channel estimator circuits receive this coding signal and digital signals supplied by oversampling devices on the diversity channels. The timing error is calculated from signals supplied by the estimators. The error calculation circuit controls an oscillator which generates a clock signal corresponding to the recovered symbol timing rate.

REFERENCES:
patent: 3758870 (1973-09-01), Schmitt et al.
patent: 3794921 (1974-02-01), Unkauf
patent: 4344176 (1982-08-01), Qureshi
patent: 4896336 (1990-01-01), Henely et al.
patent: 4941155 (1990-07-01), Chuang et al.
patent: 5027371 (1991-06-01), Sehier et al.
IEEE Global Telecommunications Conference, vol. 2, Dec. 2, 1990, San Diego, U.S., pp. 923-927; Norm W. K. Lo et al: "Adaptive equalization and diversity combining for a mobile radio channel".
Proceedings of the IEEE, vol. 73, No. 9, Sep. 1, 1985, New York, U.S., pp. 1349-1387; Shahid U. H. Qureshi: "Adaptive Equalization".

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