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Adaptive jammer suppression using decision feedback in a spread-spectrum receiver

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2 Author(s)
Shah, B. ; Dept. of Electr., Comput., & Syst. Eng., Rensselaer Polytech. Inst., Troy, NY, USA ; Saulnier, G.

The authors compare the performance of three least-mean-square (LMS) adaptive structures which supplement direct-sequence (DS) spread-spectrum techniques in the suppression of jammers. In addition to a single-input LMS adaptive structure without decision feedback, two LMS structures which use decision feedback are evaluated. Probability-of-error results are presented, and convergence properties are investigated. It is concluded that LMS adaptive filtering improves the probability-of-error performance of a DS spread-spectrum system operating in the presence of stationary single-tone jammers. It is also shown that when compared with the no feedback case, LMS adaptive systems with decision feedback do not degrade probability of error performance; however, decision feedback does not always appreciably improve system error rates.<>

Published in:

Military Communications Conference, 1988. MILCOM 88, Conference record. 21st Century Military Communications - What's Possible? 1988 IEEE

Date of Conference:

23-26 Oct. 1988