Pulse or digital communications – Equalizers – Automatic
Reexamination Certificate
2005-11-15
2005-11-15
Chin, Stephen (Department: 2634)
Pulse or digital communications
Equalizers
Automatic
C375S346000
Reexamination Certificate
active
06965640
ABSTRACT:
A device and method for generating a set of filter coefficients is provided. Sequences of samples of a first and second signal are received where the second signal includes a certain component that is correlated to the first signal. A first set of filter coefficients is generated on the basis of the first and second signals. A set of performance data elements are generated to evaluate the performance of a filter using the first set of coefficients, each performance data element being associated to a respective frequency band selected from a set of frequency bands. Following this, a set of correction signals is generated including a correction signal for each frequency band for which the associated performance data element is indicative of an unsatisfactory performance. A second set of filter coefficients is generated on the basis of the first signal, the second signals and the set of correction signals. The second set of filter coefficients is then released in a format suitable for use by a filter.
REFERENCES:
patent: 5062102 (1991-10-01), Taguchi
patent: 5117418 (1992-05-01), Chaffee et al.
patent: 5200915 (1993-04-01), Hayami et al.
patent: 5329587 (1994-07-01), Morgan et al.
patent: 5375147 (1994-12-01), Awata et al.
patent: 5442569 (1995-08-01), Osano
patent: 5526426 (1996-06-01), McLaughlin
patent: 5630154 (1997-05-01), Bolstad et al.
patent: 5790598 (1998-08-01), Moreland et al.
patent: 5889857 (1999-03-01), Boudy et al.
patent: 5912966 (1999-06-01), Ho
patent: 5974377 (1999-10-01), Navarro et al.
patent: 6035312 (2000-03-01), Hasegawa
patent: 6151358 (2000-11-01), Lee et al.
patent: 6246773 (2001-06-01), Eastty
patent: 6396872 (2002-05-01), Sugiyama
patent: 6437932 (2002-08-01), Prater et al.
patent: 6483872 (2002-11-01), Nguyen
patent: 6622118 (2003-09-01), Crooks et al.
patent: 6735304 (2004-05-01), Hasegawa
patent: 6744886 (2004-06-01), Benesty et al.
patent: 6757384 (2004-06-01), Ketchum et al.
patent: 6768796 (2004-07-01), Lu
patent: 2002/0114445 (2002-08-01), Benesty et al.
patent: 2003/0031242 (2003-02-01), Awad et al.
patent: 2003/0074381 (2003-04-01), Awad et al.
patent: 2003/0084079 (2003-05-01), Awad et al.
patent: 0709958 (1996-05-01), None
patent: 0872962 (1998-10-01), None
patent: 0982861 (2000-03-01), None
patent: 2164828 (1986-03-01), None
Adaptive filters; Theory and Applications/B. Farhang-Boroujeny. John Wiley & Sons Ltd. (chapter 12, pp. 413-437).
Numerical recipes in C: the art of scientific computing/William H. Press. Cambridge University Press (chapters 1-2, pp. 1-99).
Linear Predictive Spectral Shaping for Acoustical Echo Cancellation. Sanro Zlobec. Department of Electrical Engineering, McGill University, Montreal, Nov. 1995.
Deisher, M.E. et al., “Practical Considerations in the Implementation of a Frequency-Domain Adaptive Noise Canceller”, IEEE Transactions on Circuits and Systems, II; Analog and Digital Signal Processing, IEEE Inc. New York, US, vol. 41, No. 2, Feb. 1, 1994, pp. 164-168, XP000443037.
Awad Thomas Jefferson
Gervais Pascal Marcel
Laurence Martin
Chin Stephen
Lu Jia
Octasic Inc.
Wolf Greenfield & Sacks P.C.
LandOfFree
Method and apparatus for generating a set of filter... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for generating a set of filter..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for generating a set of filter... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3474959