Adaptive equalizer with tap coefficient averaging

Details Adaptive equalizer with tap coefficient averaging Adaptive equalizer with tap coefficient averaging

2007-02-23

2010-10-12

Phu, Phuong (Department: 2611)

Pulse or digital communications

Equalizers

Automatic

C375S232000, C375S229000, C375S230000, C708S322000, C708S323000

Reexamination Certificate

active

07813422

ABSTRACT:
In one embodiment, a receiver has an equalizer, a tap-averaging block, a delay buffer, and a filter. The equalizer receives an input signal from upstream processing and generates sets of filter coefficients. Each set of filter coefficients is adaptively generated by 1) filtering the received signal to generate an equalized signal, 2) calculating an error of the equalized signal, and 3) generating a new set of coefficients based on the error of the equalized signal. The sets of filter coefficients are output to the tap-averaging block, which averages groups of the sets of filter coefficients to generate sets of averaged filter coefficients, where each averaged set is output to the filter. The filter receives a time-delayed version of the input signal from the delay buffer and applies the current set of averaged filter coefficients to the time-delayed signal. The filtered signal is then output to downstream processing.

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“Adaptive Chip-Rate Equalization of Downlink Multirate Wideband CDMA,” by Adam R. Margetts et al, IEEE Transactions on Signal Processing, vol. 53, No. 6, Jun. 2005, XP011132701, pp. 2205-2215.

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