Adaptive equalizing system for digital communications

Details Adaptive equalizing system for digital communications Adaptive equalizing system for digital communications

1994-06-02

1996-04-09

Chin, Stephen

Pulse or digital communications

Equalizers

Automatic

375231, 375232, 375344, 36472419, 3647242, H03H 730

Patent

active

055068715

ABSTRACT:
An adaptive equalizing system equalizes an unequalized signal and performs carrier recovery for use in a digital communication receiver. An equalizing coefficient is initialized by a constant modulus algorithm (CMA) and the initialized equalizing coefficient is more finely updated by a stop-and-go algorithm (SGA). When the convergency by the CMA reaches a predetermined threshold value, carrier recovery is performed, while when an average value of the phase error during performing the carrier recovery is less than another predetermined threshold value, the equalizing algorithm is converted into the SGA. Thus, the adaptive equalizing apparatus can equalize the received signal more simply and reliably.

REFERENCES:
patent: 5050186 (1991-09-01), Gurcan et al.
patent: 5068873 (1991-11-01), Murakami
patent: 5283813 (1994-02-01), Shalvi et al.

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