Phase discriminator with a phase compensation circuit

Details Phase discriminator with a phase compensation circuit Phase discriminator with a phase compensation circuit

2005-08-30

2005-08-30

Chin, Stephen (Department: 2634)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

C329S350000, C375S341000, C375S224000, C375S147000, C375S329000

Reexamination Certificate

active

06937684

ABSTRACT:
A differential phase discriminator includes a phase compensation circuit to compensate for timing drift and error for recovering timing information in a digital phase lock loop. The differential phase discriminator uses a differential phase detector to compute the phase difference of two consecutive frequency domain signal samples. The phase compensation circuit determines a phase correction term by computing the difference between the absolute values of the real and imaginary parts of a frequency domain signal sample. A weighting factor is computed by adjusting the sum of the absolute values of the real and imaginary parts of the frequency domain signal sample with a ratio adjustment factor. A phase compensation value is then computed by multiplying the phase correction term by the weighting factor. The phase compensation value is added to the uncorrected output of the differential phase detector.

REFERENCES:
patent: 4439737 (1984-03-01), Mattei
patent: 4660216 (1987-04-01), Claasen et al.
patent: 4862098 (1989-08-01), Yassa et al.
patent: 5136611 (1992-08-01), Kirimoto et al.
patent: 6549561 (2003-04-01), Crawford
patent: 2003/0016737 (2003-01-01), Wu et al.
“SACHEM, a Versatile DMT-Based Modem Transceiver for ADSL”□□L. Kiss, K. Adriaensen, C. Gendarme, E. Hanssens, M. Huysmans, F. Van Beylen, and H. Van De Weghe□□IEEE Journal of Solid-State Circuits, vol. 34, No. 7, Jul. 1999 pp. 1001-1009.
“Timing Recovery For Echo-Cancelled Discrete Multitone Systems”□□Minnie Ho and John M. Cioffi□□IEE International Conference on Communications SUPERCOMM/ICC'94, vol. 1, 1994, pp. 307-310.

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