Television – Image signal processing circuitry specific to television – Noise or undesired signal reduction
Patent
1997-07-02
1998-11-24
Hsia, Sherrie
Television
Image signal processing circuitry specific to television
Noise or undesired signal reduction
348725, 348914, 375287, 375232, H04N 521
Patent
active
058414843
ABSTRACT:
A blind-equalization method and apparatus are disclosed for equalization of a channel of an HDTV receiver. The HDTV receiver comprises a rejection filter corresponding to a precoder for which precoding is implemented at a television transmitter for combating co-channel interference, wherein the television transmitter transmits a digital television signal. The HDTV receiver further comprises an equalizer having an input and an output. The equalization method comprises the steps of initiating an equalization with a blind slicing mode. The method further comprises changing the equalization to a training sequence mode upon an occurrence of a no flutter condition. While in the training sequence mode, if a flutter condition occurs, then the equalization is returned to the blind slicing mode. A determination of the occurrence of the flutter condition is based upon an estimate of a negative derivative of the Signal-to-Noise Ratio (SNR) at the output of the equalizer, dS.sub.o, being greater than a prescribed threshold.
REFERENCES:
patent: 5263033 (1993-11-01), Seshadri
patent: 5452015 (1995-09-01), Hulyalker
patent: 5512956 (1996-04-01), Hulyalkar
patent: 5517263 (1996-05-01), Bhah et al.
patent: 5526378 (1996-06-01), Knutsom et al.
patent: 5572249 (1996-11-01), Ghosh
patent: 5602602 (1997-02-01), Hulyalkar
patent: 5648822 (1997-07-01), Hulyalkar
A Method of Self-Recovering Equaliztion for Multilevel Amplitude Modulation Systems, By Y. Sata in vol. COM-23, pp. 679-682, Jun. 1975.
VSB Transmission System: Technical Details, Feb. 18, 1994.
New Automatic Equalizer Employing Modulo Arithmetic, Electronic Letters, pp. 138-139, Mar. 1971, By M. Tomlinson.
Matched-Transmission Technique for Channels with Intersymbol Interference, IEEE Transactions on Communications, vol. COM-20, No. 4 pp. 774-780, Aug. 1972, by H.Harashima dn H. Miyakawa.
Liu et al, "Multiuser Blind Channel Estimation & Spatial Channel Equalization", ICASSP '95:Acoustics Speech & Signal Processing Sentence, vol. 3, pp. 1756-1759, May 1995.
Li, "Blind Deconvolution of Linear Systems w/ Nonstationary Discrete Inputs", Higher Order Statistics, 1993 Workshop, pp. 160-163, Jun. 1993.
Weerackody et al, "Dual-Mode Type Algorithms for Blind Equalization", IEEE Transactions on Communications, vol. 42, Issue 1, pp. 22-28, Jan. 1994.
Ghosh Monisha
Hulyalkar Samir N.
Hsia Sherrie
Philips Electronics North North America Corporation
LandOfFree
Blind equalizer method and apparatus for HDTY transmission using does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Blind equalizer method and apparatus for HDTY transmission using, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blind equalizer method and apparatus for HDTY transmission using will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1708853