Circuit and method for symbol timing recovery in phase...

Details Circuit and method for symbol timing recovery in phase... Circuit and method for symbol timing recovery in phase...

2005-03-29

2005-03-29

Fan, Chieh M. (Department: 2634)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S330000, C375S355000

Reexamination Certificate

active

06873666

ABSTRACT:
The present invention relates to a circuit and method for symbol timing recovery in phase modulation systems. First, phase differences of in-phase signals and quadrature signals in a polar coordinate are generated at the same sampling points of neighboring symbols. Second, an operator is generated by taking a square of a value subtracting the phase difference from a default phase value. Third, the sums of phase differences of every sampling point in a symbol are computed to determine an optimal sampling point in a symbol period and correctly recover symbol timing of signal sequences. By the above properties, the present invention has a simple structure and can shorten an execution time.

REFERENCES:
patent: 4146841 (1979-03-01), McRae
patent: 4941155 (1990-07-01), Chuang et al.
patent: 5892803 (1999-04-01), Saunders et al.
patent: 6212246 (2001-04-01), Hendrickson

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