Adaptive equalizer with midburst correction capability

Details Adaptive equalizer with midburst correction capability Adaptive equalizer with midburst correction capability

1991-05-09

1992-11-17

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

333 18, 375 14, 375101, H04L 2701

Patent

active

051649624

ABSTRACT:
An adaptive equalizer in a digital receiver filters differentially encoded data bursts containing known data preceded and followed by user data. A storage means saves and restores filter coefficients and other values so that the known data can be filtered repeatedly. As the known data are repeatedly filtered, a known-data generating means generates different differential encodings of the known data as desired data which are compared with the filtered values to obtain error values for use in updating the filter coefficients. A comparator means selects the encoding that produces the smallest cumulative error. The known data are then filtered once more, using the selected encoding as desired data, after which adaptive filtering of user data continues.

REFERENCES:
patent: 4483009 (1984-11-01), Honda et al.
patent: 4674103 (1987-06-01), Chevillat et al.
patent: 4965969 (1987-09-01), Sollenberger
patent: 5058130 (1991-10-01), Park
John G. Proakis, Digital Communications, Mc-Graw-Hill 1989 pp. 554-573.

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