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Báo cáo hóa học: " Research Article Minimum Probability of Error-Based Equalization Algorithms for Fading Channels"

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 Minimum Probability of Error-Based Equalization Algorithms for Fading Channels | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2007 Article ID 14683 12 pages doi 10.1155 2007 14683 Research Article Minimum Probability of Error-Based Equalization Algorithms for Fading Channels Janos Levendovszky 1 Lorant Kovacs 1 and Edward C. van der Meulen2 1 Department of Telecommunications Budapest University of Technology and Economics Magyar tudosok korutja 2 1117 Budapest Hungary 2 Department of Mathematics Katholieke Universiteit Leuven Celestijnenlaan 200B 3001 Leuven Heverlee Belgium Received 12 December 2006 Revised 14 March 2007 Accepted 29 April 2007 Recommended by George K. Karagiannidis Novel channel equalizer algorithms are introduced for wireless communication systems to combat channel distortions resulting from multipath propagation. The novel algorithms are based on newly derived bounds on the probability of error PE and guarantee better performance than the traditional zero forcing ZF or minimum mean square error MMSE algorithms. The new equalization methods require channel state information which is obtained by a fast adaptive channel identification algorithm. As a result the combined convergence time needed for channel identification and PE minimization still remains smaller than the convergence time of traditional adaptive algorithms yielding real-time equalization. The performance of the new algorithms is tested by extensive simulations on standard mobile channels. Copyright 2007 Janos Levendovszky et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Since radio spectrum became scarce and expensive one of the major concerns of wireless communication is to maximize spectral efficiency SE . This implies that broadband services are implemented over narrowband radio channels which makes them susceptible to selective