Performance results of subband transform-domain excision and LMS algorithms

Michael J. Medley; Gary J. Saulnier

doi:10.1117/12.271753

3 April 1997 Performance results of subband transform-domain excision and LMS algorithms

Michael J. Medley, Gary J. Saulnier

Author Affiliations +

Proceedings Volume 3078, Wavelet Applications IV; (1997) https://doi.org/10.1117/12.271753
Event: AeroSense '97, 1997, Orlando, FL, United States

Abstract

Direct sequence spread spectrum signaling is often used as a means of providing reliable digital communications in potentially hostile environments. In this paper, the performance of interference mitigation algorithms using transform domain excision and Wiener filtering are presented. In the presence of single-tone and narrow-band Gaussian jammers, block and lapped transform domain excisers are evaluated and compared. Results illustrating the performance of transform domain Wiener filters in the presence of various frequency tone interferers are also presented. In practice, adaptive Wiener filtering is often approximated using the least mean-square adaptive algorithm. Under certain conditions, the convergence rate of these algorithms can be improved in the transform domain through the use of power normalization. Results depicting such improvements in the presence of narrow-band interference are discussed herein.

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Michael J. Medley and Gary J. Saulnier "Performance results of subband transform-domain excision and LMS algorithms", Proc. SPIE 3078, Wavelet Applications IV, (3 April 1997); https://doi.org/10.1117/12.271753

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