Co-channel interference reduction system for digital high defini

Details Co-channel interference reduction system for digital high defini Co-channel interference reduction system for digital high defini

1990-10-19

1992-02-04

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358135, 375103, H04N 713

Patent

active

050863401

ABSTRACT:
A co-channel interference reduction system for digital high definition television includes a transmitter having a modulo 4 processing precode filter. A receiver includes a pair of selectable video processing modes. The first mode provides a comb filter for removing co-channel interference signals together with a modulo 4 interpreter for restoring the four level data signal despite the intersymbol interference signal introduced by the comb filter segment. In the alternate mode operable in the absence of co-channel interfering signals, a level slicer and postcoder are used to restore the precoded signal to the original four level data signal.

REFERENCES:
patent: 4032847 (1977-06-01), Unkauf
patent: 4216496 (1980-08-01), Lothian et al.
patent: 4343019 (1982-08-01), Lagoni
patent: 4503545 (1985-03-01), Bremer et al.
patent: 4609907 (1986-09-01), Adler et al.
patent: 4635104 (1987-01-01), Hausdorfer
patent: 4730343 (1988-03-01), Kanemasa et al.
patent: 4890283 (1989-12-01), Tsinberg et al.
patent: 4947243 (1990-08-01), Wendland et al.
patent: 4953183 (1990-08-01), Bergmanns et al.
patent: 5003555 (1991-03-01), Bergmans
Digital Communications: Microwave Applications, Feher, Copr. 1981 by Prentice Hall, Inc., pp. 144-163.

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