標題: Narrow-band interference rejection in DS/CDMA systems using adaptive (QRD-LSL)-based nonlinear ACM interpolators
作者: Yuan, JT
Lee, JN
電信工程研究所
Institute of Communications Engineering
關鍵字: approximate conditional mean (ACM) nonlinear;filter;code-division multiple access (CDMA);interpolation filters;lattice structure;least mean square (LMS)-based filters;narrow-band interference (NBI) suppression;prediction filters;predictors;QR-decomposition-based least squares lattice;(QRD-LSL) interpolators
公開日期: 1-三月-2003
摘要: An Mth order adaptive lattice filter automatically generates all M of the outputs that would be provided by M separate transversal filters. This feature may effectively suppress the narrow-band interference (NBI) of either unknown or time-varying bandwidth (or number of frequency bands) in direct-sequence code-division multiple access systems for which the order of the interference rejection filter that achieves the optimal performance is unknown or constantly changing. Moreover, a lattice filter may significantly outperform its transversal counterpart in complex jamming environments in which the adaptive lattice filter must suppress multiple jammers, since each stage of a lattice filter adapts to suppress an orthogonal component of the NBI. This paper,develops a computationally efficient and numerically stable adaptive QR-decomposition-based least squares lattice (QRD-LSL)-based nonlinear approximate conditional mean interpolator to suppress NBI effectively. Simulation results demonstrate that both the signal-to-noise ratio improvements and the convergence rate achieved by the proposed interpolators outperform those of other existing prediction-based techniques.
URI: http://dx.doi.org/10.1109/TVT.2002.808808
http://hdl.handle.net/11536/28041
ISSN: 0018-9545
DOI: 10.1109/TVT.2002.808808
期刊: IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
Volume: 52
Issue: 2
起始頁: 374
結束頁: 379
顯示於類別:期刊論文


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