Scaled signal processing elements for reduced filter tap noise

j j j k k kkmaxmax j An adaptive transversal filter having tap weights Wj which are products of corresponding tap coefficients Cand tap gains Mis provided. A filter control loop controls all of the tap coefficients Csuch that an error signal derived from the filter output is minimized. One or more t...

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Bibliographic Details
Main Authors Callicotte, Mark Joseph, Takatori, Hiroshi
Format Patent
LanguageEnglish
Published 30.10.2012
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Summary:j j j k k kkmaxmax j An adaptive transversal filter having tap weights Wj which are products of corresponding tap coefficients Cand tap gains Mis provided. A filter control loop controls all of the tap coefficients Csuch that an error signal derived from the filter output is minimized. One or more tap control loops controls a tap gain Msuch that the corresponding tap coefficient Csatisfies a predetermined control condition. For example, |C| can be maximized subject to a constraint |C| C, where Cis a predetermined maximum coefficient value. In this manner, the effect of quantization noise on the coefficients Ccan be reduced. Multiple tap control loops can be employed, one for each tap. Alternatively, a single tap control loop can be used to control multiple taps by time interleaving.