Electrical audio signal processing systems and devices – Noise or distortion suppression – Using signal channel and noise channel
Reexamination Certificate
2006-04-04
2006-04-04
Chin, Vivian (Department: 2644)
Electrical audio signal processing systems and devices
Noise or distortion suppression
Using signal channel and noise channel
Reexamination Certificate
active
07024005
ABSTRACT:
An observed signal that is corrupted with impulse noise is recorded in a signal processing system of an image processing system or a digital subscriber line (xDSL). The observed signal that is recorded by the signal processing system includes a noise component and data component. The signal processing system estimates the parameters of an alpha-stable distribution using a modified iteratively reweighted least squares (IRLS) technique. The estimated parameters define a probability density function that is used to model the noise component of the observed signal. Once the parameters of the alpha-stable distribution are estimated, the signal processing system uses them to estimate model coefficients of a non-linear prediction filter such as a Volterra filter. Using the model coefficients, the non-linear prediction filter estimates the data component of the observed signal.
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Henkel, Werner et al., “Coded 64-CAP ADSL in an Impulse-Noise Environment—Modeling of Impulse Noise and First Simulation Results,” IEEE Journal on Selected Areas in Communications, vol. 13, No. 9, Dec. 1995, pp. 1611-1621, no day.
Ilow, Jacek et al. “Detection in Alpha-Stable Noise Environments Based on Predictin,” International Journal of Adaptive Control and Signal Processing, vol. 11, No. 7, Nov. 1997, pp. 555-568, no day.
Kerpez, Kenneth J. et al., “The Error Performance of Digital Subscriber Lines in the Presence of Impulse Noise,” IEEE Transactions on Communications, vol. 43, No. 5, May 1995. pp. 1902-1905, no day.
Kim, Hyun Mun et al. “Fuzzy Prediction and Filtering in Impulsive Noise,” Fuzzy Sets & Systems, vol. 77, No. 1, Jan. 1996, pp. 15-33.
Kogon, Stephen M. et al, “On the Characterization of Impulsive Noise with β-Stable Distributions Using Fourier Techniques,” IEEE Proceedings of ASILOMER-29, 1996, pp. 787-791.
Kuruoglu, Ercan E. et al., “Impulsive Noise Elimination Using Polynomial Iteratively Reweighted Least Squares, ”Proceedings 1996 IEEE Digital Signal Processing Workshop Proceedings, Sep. 1-4, 1996, Loen, Norway, p. 347-350.
Kuruoglu, Ercan E. et al., “Least Lp-Norm Estimation of Autoregressive Model Coefficients of Symmetric β-Stable Processes,” IEEE Signal Processing Letters, vol. 4, No. 7, Jul. 1997, pp. 201-203.
Kuruoglu, Ercan E. et al., “Least Lp-Norm Impulsive Noise Cancellation with Polynomial Filters,” Signal Processing, vol. 69, No. 1, Aug. 1998, pp. 1-14.
Kuruoglu, Ercan E. et al, “Near Optical Detection Of Signals In Impulsive Noise Modeled with A Symmetric Alpha-Stable Distribution”, published in IEEE Communications Letters, vol. 2, No. 10, pp. 282-284, Oct. 1998.
Kuruoglu, Ercan E. et al., “A Near Optimal Receiver for Detecton In β-Stable Distributed Noise,” Proceedings of 1998 IEEE Statistical Signal and Array Processing Workshop, Portland, Oregon, USA, Sep. 14-16, 1998 (also published in IEEE Communications Letters, vol. 2, No. 10, pp. 282-284, Oct. 1998).
Ma, Xinyu et al., “Parameter Estimation and Blind Channel Indentification in Impulsive Signal Environments,” IEEE Transactions on Signal Processing, vol. 43, No. 12, Dec. 1995, pp. 2884-2897.
McCullough, J. Huston, “Simple Consistent Estimators of Stable Distribution Parameters,” Communications in Statistics-Simulation and Computation, vol. 75, 1996, pp. 1109-1136.
Nolan, John P., “Maximum Likelihood Estimation and Diagnostics for Stable Distributions,” availbale from http://www.cas.american.edu/˜jpnolan/stable.html, 1998.
Tsihrintzis, George A. et al., “Fast Estimation of the Parameters of Alpha-Stable Impulsive Interference,” IEEE Transactions on Signal Processing, vol. 44, No. 6, Jun. 1996, pp. 1492-1503.
Zolotarev, V.M., “Mellin-Stieltjes Transforms in Probability Theory,” Theory of Probability and Its Applications, vol. 2, No. 4, 1957, pp. 433-459.
Dance Christopher R.
Kuruoglu Ercan E.
Chin Vivian
Faulk Devona E
Xerox Corporation
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