Title:
METHOD FOR WHITENING COLORED NOISE
Document Type and Number:
WIPO Patent Application WO2002102006
Kind Code:
A3
Abstract:
A filter settings generation operation includes sampling colored noise present at the input of a receiver to produce a sampled signal. The sampled signal is spectrally characterized across a frequency band of interest to produce a spectral characterization of the sampled signal. This spectral characterization does not include a signal of interest. The spectral characterization is then modified to produce a modified spectral characterization. Filter settings are then generated based upon the modified spectral characterization. Finally, the input present at the receiver is filtered using the filter settings when the signal of interest is present to whiten colored noise that is present with the signal of interest. In modifying the spectral characterization, pluralities of spectral components of the spectral characterization are independently modified to produce the modified spectral characterization. Modifications to the spectral characterization may be performed in the frequency domain and/or the time domain. Particular modifications include amplifying spectral components, weighting spectral components based upon prior spectral components, and averaging spectral components with prior spectral components.
Inventors:
OJARD ERIC
BAGCHI AMIT GOUTAM
BAGCHI AMIT GOUTAM
Application Number:
PCT/US2002/018517
Publication Date:
March 06, 2003
Filing Date:
June 10, 2002
Export Citation:
Assignee:
BROADCOM CORP (US)
International Classes:
H04B1/10; H04L1/00; H04L25/03; H04B1/12; (IPC1-7): H04L25/03
Domestic Patent References:
| WO1999062052A2 | 1999-12-02 |
Foreign References:
| US5612978A | 1997-03-18 | |||
| US5721694A | 1998-02-24 |
Other References:
PATTI ET AL.: "Adaptive and block excisions in spread spectrum communication systems using the wavelet transform", ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS AND COMPUTERS, 30 October 1994 (1994-10-30) - 2 November 1994 (1994-11-02), New York, US, pages 293 - 297, XP000533585, ISBN: 0-8186-6406-1
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