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A pipelined LMS adaptive FIR filter architecture without adaptation delay

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3 Author(s)
Douglas, S.C. ; Dept. of Electr. Eng., Utah Univ., Salt Lake City, UT, USA ; Quanhong Zhu ; Smith, K.F.

Past methods for mapping the least-mean-square (LMS) adaptive finite-impulse-response (FIR) filter onto parallel and pipelined architectures either introduce delays in the coefficient updates or have excessive hardware requirements. We describe a hardware-efficient pipelined architecture for the LMS adaptive FIR filter that produces the same output and error signals as would be produced by the standard LMS adaptive filter architecture without adaptation delays. Unlike existing architectures for delayless LMS adaptation, the new architecture's throughput is independent of the filter length

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Signal Processing, IEEE Transactions on  (Volume:46 ,  Issue: 3 )