24 June 1999 Adaptive anntena array receivers for spread-spectrum signals in impulsive noise
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Abstract
We consider the problem of recovering a spread-spectrum signal in the presence of unknown highly correlated spread- spectrum interference and impulsive noise. In terms of basic system and signal model considerations, we assume availability of a narrowband adaptive antenna array that experiences additive white Gaussian noise in time and across elements, as well as impulsive disturbance that is correlated across elements. The space-time receiver design developed in this work is characterized by the following attributes: (1) Adaptive interference suppression is pursued in the joint space-time domain. (2) An adaptive parametric non-linear front-end offers effective suppression of impulsive disturbances at low computational cost. (3) An adaptive auxiliary-vector linear filter post-processor offers effective, low-complexity suppression of SS interferes that avoids eigen-decomposition and/or matrix inversion operations and leads to superior BER performance under rapid, short-data-record system adaptation. Numerical and simulation comparisons with plain and outlier resistant space-time MVDR filtering procedures are included to illustrate and support the theoretical developments.
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Dimitris A. Pados, Michael J. Medley, Stella N. Batalama, "Adaptive anntena array receivers for spread-spectrum signals in impulsive noise", Proc. SPIE 3708, Digital Wireless Communication, (24 June 1999); doi: 10.1117/12.351224; https://doi.org/10.1117/12.351224
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