Linearity corrector using filter products

Details Linearity corrector using filter products Linearity corrector using filter products

2008-03-25

2008-03-25

Mai, Lam T. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Nonlinear

C341S155000

Reexamination Certificate

active

07348908

ABSTRACT:
A linearity corrector is provided that reduces distortion in a signal processing system, such as an ADC. The linearity corrector provides a first order signal path having distortion components connected to an adder, and a filter product circuit that is also connected to the adder. A method is provided for reducing distortion by calculating a filter product and adding the filter product to a first order signal having a relative delay such that the filter product reduces, or eliminates, the order of distortions corresponding to the order of the filter product.

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Taiho Koh et al, “Second-Order Volterra Filtering and Its Application to Nonlinear System Identification”, IEEE Transactions vol. ASSP-33 No. 6, Dec. 1985.
Zhang Jia-Shu et al “A Reduced Parameter Second-Order Volterra Filter with Application to Nonlinear Adaptive Prediction of Chaotic Time Series” Chin. Phys Soc vol. 50 Jul. 2001.
Walter Frank, “Compensation of Linear & Nonlinear Sensor Distortions by Digital Post Processing”, (Sensor 95) pp. 889-892, 1995.
Walter Frank et al, “Realtime Loudspeaker Linearization”, IEEE Winter Workshop 1993.
Konstantina Karagianni et al, “Efficient Third-Order Volterra Filter Computation in the Time Domain”, IEEE U.S., Nov. 2003.

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