Abstract
It has been shown that the convergence speed of an adaptive transversal filter can be made faster if the filter is split into a pair of symmetric/antisymmetric linear phase subfilters. In this brief, a generalized multilevel splitting approach is proposed which enables the realization of a modular split-path adaptive filter. It is demonstrated that an LMS FIR filter of length 2L, where L is an integer, can be decomposed into a set of parallel single-parameter subfilters by a novel L-step splitting procedure. The convergence behavior of the new filter configuration is improved noticeably and is confirmed experimentally. A unified perspective of the multilevel split-path adaptive filtering method with the discrete Walsh transform adaptation is also established.
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More From: IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing
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