Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Pruned Multiangle Resolution Fast Beamforming | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008 Article ID 328041 15 pages doi 2008 328041 Research Article Pruned Multiangle Resolution Fast Beamforming Yeo-Sun Yoon 1 2 Lance M. Kaplan 3 Seung-Mok Oh 4 and James H. McClellan5 1 Center for Advanced Communications Villanova University Villanova PA 19085 USA 2 Radar System Group Samsung Thales Company Yongin Kyunggido Korea 3 Army Research Laboratory Adelphi MD 20783 USA 4 Texas Instruments Inc. San Diego CA 92121 USA 5 Center for Signal and Image Processing CSIP School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA 30332 USA Correspondence should be addressed to Yeo-Sun Yoon ysyoon@ Received 8 June 2007 Accepted 23 March 2008 Recommended by Bernhard Wess Delay-and-sum DS beamforming is a simple processing method that can estimate the direction-of-arrival from multiple signal sources. The major advantage of DS beamforming is that it can handle wideband as well as narrowband signals. However DS beamforming exhibits high computational complexity. The multiangle resolution fast beamformer was proposed as a computationally efficient approximation of DS beamforming reducing the computational order of complexity from O n3 to O n2log n . In this paper we introduce the pruned multiangle resolution fast beamformer to further reduce the computational complexity. The new algorithm includes an energy detector at intermediate stages of the fast beamformer to prune sectors that do not exhibit increasing energy consistent with coherent integration. Simulations are provided to assess the performance of the pruned fast beamformer. One use for the estimates from the pruned fast beamformer is to initialize high-resolution direction-of-arrival DOA estimators such as coherent signal subspace methods. Copyright 2008 Yeo-Sun Yoon et al. This is an open access article distributed under the Creative Commons Attribution License which permits .
