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Real-time implementation of a frequency-domain adaptive filter on a fixed-point signal processor

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2 Author(s)
Deisher, Michael E. ; Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA ; Spanias, A.S.

The authors study some problems associated with the implementation of a frequency-domain adaptive algorithm on a fixed-point signal processor. In particular, they propose methods to improve the convergence speed and reduce the computational complexity of a constrained frequency-domain algorithm that uses a time-varying step size. In addition, they study the effects of finite word length and fixed-point arithmetic. Improvements are realized by adopting a novel data reusing scheme and by applying running and pruned FFTs (fast Fourier transforms). Results are given using synthetic data as well as data from noise cancellation experiments

Published in:

Acoustics, Speech, and Signal Processing, 1991. ICASSP-91., 1991 International Conference on

Date of Conference:

14-17 Apr 1991