Timing and carrier recovery in TDMA without preamble sequence

Details Timing and carrier recovery in TDMA without preamble sequence Timing and carrier recovery in TDMA without preamble sequence

1988-10-13

1990-12-11

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

370 953, 375111, H04J 316

Patent

active

049775804

ABSTRACT:
The present invention provides a method of detecting the clock rate and recovering the carrier in a TDMA (time division multiple access) signal. The quadrature baseband components are stored for a predetermined amount of time as sampled data and the clock phase error of the baseband samples are estimated. The clock phase of the baseband samples are corrected from the estimated clock phase error by using interpolation over the sampled quadrature components. The carrier phase error of the stored baseband time corrected quadrature samples are then estimated and the carrier phase is corrected according to the estimated phase error. The corrected clock and carrier signals are then forwarded to decision circuit means for providing demodulated data.

REFERENCES:
patent: 3792364 (1974-02-01), Ananias
patent: 4794341 (1988-12-01), Barton et al.
patent: 4852090 (1989-07-01), Borth
patent: 4866739 (1989-09-01), Agazzi et al.
J. G. Proakis; "Digital Communications", 1983, pp. 202-203, McGraw--Hill, Inc.

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