Apparatus and method for timing recovery in the reception of bas

Details Apparatus and method for timing recovery in the reception of bas Apparatus and method for timing recovery in the reception of bas

1990-03-05

1993-03-02

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375110, H04L 7033

Patent

active

051915960

ABSTRACT:
A timing recovery circuit of the sampling type uses two signal samples per symbol time and utilizes a control signal (for a local oscillator which generates the timing signal) which is given essentially by the product of a reconstruction error signal, derived at the generic sampling instant, multiplied by the difference between the values of the reconstruction symbols, taken at one-half symbol interval respectively before and after said sampling instant. The derived control signal allows generation of a timing signal which positions with extreme accuracy and stability the sampling instant of the received signal at the minimum points of the mean square error curve, even under selective fading conditions.

REFERENCES:
patent: 4597088 (1986-06-01), Posti et al.
patent: 4709378 (1987-11-01), Wouda et al.
patent: 4789994 (1988-12-01), Randall et al.
patent: 4941151 (1990-07-01), Abbiate et al.
patent: 4943789 (1990-07-01), Surie
"A BPSK/QPSK Timing-Error Detector for Sampled Receivers", Floyd M. Gardner; IEEE Transactions on Communications, vol. COM-34, No. 5, May 1986.
"Statistical Properties of Timing Jitter: a PAM Timing Recovery Scheme", Franks et al., IEEE Transactions on Communications, vol. COM-22, No. 7, Jul. 1974.
"A New Selective Fading Model: Application to Propagation Data", W. D. Rummler, B.S.T.J., vol. 58, pp. 1037-1071, May-Jun. 1979.

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