Ho-Ming Lin Phones & Addresses
-
5 Garnet, Irvine, CA 92620 (714) 368-0888
Publications
Us Patents
Method And System For Dynamic Interleaver Adaptation Scheme In Vdsl
View pageUS Patent:
7408999, Aug 5, 2008
Filed:
Dec 9, 2005
Appl. No.:
11/297634
Inventors:
Tao Xue - Irvine CA, US
Fuqiang Shi - Monmouth Junction NJ, US
Massimo Sorbara - Freehold NJ, US
Ho-ming Lin - Irvine CA, US
Fuqiang Shi - Monmouth Junction NJ, US
Massimo Sorbara - Freehold NJ, US
Ho-ming Lin - Irvine CA, US
Assignee:
Conexant Systems, Inc. - Red Bank NJ
International Classification:
H04L 5/12
H03M 13/00
H03M 13/00
US Classification:
375262, 375265, 714756
Abstract:
The present invention provides a method and apparatus for a new interleaver adaptation scheme that achieves “error free” and zero delay (interleaving—triangular) or near zero delay variation (interleaving—GCI), and with easier implementation but no additional memory required. The dummy insertion methods and systems embodiments of the invention provide an effective dummy byte insertion scheme for applications that require seamless on-line rate changes, e. g. , SRA (seamless rate adaptation), DRR (dynamic rate repartitioning) and adaptive INP (impulse noise protection).
Method And System For Dynamic Interleaver Adaptation Scheme In Vdsl
View pageUS Patent:
7466758, Dec 16, 2008
Filed:
Dec 9, 2005
Appl. No.:
11/297632
Inventors:
Tao Xue - Irvine CA, US
Massimo Sorbara - Freehold NJ, US
Ho-Ming Lin - Irvine CA, US
Massimo Sorbara - Freehold NJ, US
Ho-Ming Lin - Irvine CA, US
Assignee:
Conexant Systems, Inc. - Newport Beach CA
International Classification:
H04L 5/12
H03M 13/00
H03M 13/00
US Classification:
375262, 375265, 714756
Abstract:
The present invention provides a method and apparatus for a new interleaver adaptation scheme that achieves “error free” and zero delay (interleaving—triangular) or near zero delay variation (interleaving—GCI), and with easier implementation but no additional memory required. The dummy insertion methods and systems embodiments of the invention provide an effective dummy byte insertion scheme for applications that require seamless on-line rate changes, e. g. , SRA (seamless rate adaptation), DRR (dynamic rate repartitioning) and adaptive INP (impulse noise protection).
Method And Apparatus For Reducing Noise Correlation In A Partial Response Channel
View pageUS Patent:
59955619, Nov 30, 1999
Filed:
Apr 10, 1996
Appl. No.:
8/632348
Inventors:
Richard G. Yamasaki - Torrance CA
Ryohei Kuki - Tokyo, JP
Ho-Ming Lin - Irvine CA
Craig Tammel - Balboa Island CA
Ryohei Kuki - Tokyo, JP
Ho-Ming Lin - Irvine CA
Craig Tammel - Balboa Island CA
Assignee:
Silicon Systems, Inc. - Tustin CA
International Classification:
H04L 2706
US Classification:
375341
Abstract:
A method and apparatus for reducing noise correlation in a partial response channel through optimization of a look-ahead maximum likelihood (ML) detector. In the method of the present invention, the ML detector is optimized in light of the noise correlation generated by the partial response channel. The improved ML detector provides comparable performance to, or better performance than, a Viterbi detector in the presence of colored noise. In the present invention, a set of finite impulse response (FIR) transversal filters are used as the ML estimator for the look-ahead detector. The weighted sum outputs of the FIR filters are compared to a set of thresholds based on previously detected data to make the decision for current detection. The present invention improves the ML detector's performance and reduces its complexity by optimizing the coefficients of the FIR filters in the presence of the correlated or colored noise. The SNR (signal-to-noise ratio) of each FIR filter is determined for a range of coefficients based on the noise autocorrelation of the channel for a given user density, and the coefficients providing the highest SNR are selected for each decision function.