%0 Journal Article
%T Ultra-Wideband Source Localization Using a Particle-Swarm-Optimized Capon Estimator from a Frequency-Dependent Channel Modeling Viewpoint
%A Yifan Chen
%A Vimal K. Dubey
%J EURASIP Journal on Advances in Signal Processing
%D 2005
%I Springer
%R 10.1155/asp.2005.1854
%X We introduce a realistic frequency-dependent channel model for ultra-wideband (UWB) communication systems and develop a generalized broadband Capon spatial spectrum estimator for localization of multiple incoherently distributed scattering clusters. The proposed estimator is able to address the three crucial features of practical UWB impulse propagation: presence of local scattering for multiple incoherently distributed clusters, wideband array signals, and frequency-dependent dispersive effects. The particle-swarm optimization, which is a recently invented high-performance optimizer based on the movement and intelligence of swarms, is then implemented to perform a multidimensional parameter search to jointly estimate the source central angles, the polynomial regression coefficients for angle spreads, and the frequency-dependence of various clusters. Numerical experiments are also carried out to examine the performance of the algorithm under various environments and model mismatches.
%K array processing
%K UWB channel modeling
%K broadband Capon estimator
%K particle-swarm optimization
%K multidimensional search.
%U http://dx.doi.org/10.1155/ASP.2005.1854