Pulse or digital communications – Equalizers – Automatic
Patent
1996-06-04
1998-01-27
Chin, Stephen
Pulse or digital communications
Equalizers
Automatic
375230, 375231, 375232, H03H 730, H03H 740
Patent
active
057128731
ABSTRACT:
A digital high definition television receiver equalizer system includes an input adaptive feed forward filter (FFF 20), a carrier recovery network (46), and a slicer (40) in addition to an adaptive decision feedback filter (DFF, 30) for removing intersymbol interference. At the beginning of a blind equalizing interval the FFF is not adapted and the DFF operates as a linear filter with adapted coefficients for equalizing post-ghosts. Afterwards in the blind interval the FFF coefficients are adapted blindly for equalizing pre-ghosts. In a subsequent decision-directed mode the slicer output is used for adapting both the FFF and DFF non-linearly.
REFERENCES:
patent: 4227152 (1980-10-01), Godard et al.
patent: 4309770 (1982-01-01), Godard
patent: 5414732 (1995-05-01), Kaufmann
patent: 5506871 (1996-04-01), Hwang et al.
patent: 5517213 (1996-05-01), Bhatt et al.
patent: 5530485 (1996-06-01), Kim et al.
patent: 5537437 (1996-07-01), Kaku et al.
patent: 5539773 (1996-07-01), Kuee et al.
patent: 5539774 (1996-07-01), Nubakht et al.
patent: 5572547 (1996-11-01), Citta et al.
patent: 5598433 (1997-01-01), Kaku et al.
patent: 5602872 (1997-02-01), Andrews
Tianmin Liu et al., Simulation and Implementation of US QAM-Based HDTV Channel Decoder, IEEE Transaction on Consumer Electronics, vol. 39, No. 3, Aug. 1993.
Neil K. Jablon, Joint Blind Equalization, Carrier Recovery, and Timing Recovery for High-Order QAM Signal Constellations, IEEE Transaction on Signal Processing, vol. 40, No. 6, Jun. 1992.
R. Citta et al., The Digital Spectrum-Compatible HDTV Transmission System, IEEE Transactions on Consumer Electronics, Aug. 1991.
F. N. Godard, Self-Recovering Equalization and Carrier Tracking in Two-Dimensional Data Communication Systems, IEEE Transactions on Communications, vol. COM-28, No. 11, Nov. 1980.
E. A. Lee et al., Digital Communication, pp. 184-187 and pp. 335-339.
Knutson Paul Gothard
Ramaswamy Kumar
Shiue Dong-Chang
Chin Stephen
Ghayour Mohammad
Herrmann Eric P.
Kurdyla Ronald H.
Thomson Consumer Electronics Inc.
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