tailieunhanh - Báo cáo hóa học: " Impact of the Gaussian Approximation on the Performance of the Probabilistic Data Association MIMO Decoder"

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: Impact of the Gaussian Approximation on the Performance of the Probabilistic Data Association MIMO Decoder | EURASIP Journal on Wireless Communications and Networking 2005 5 796-800 2005 Justus Ch. Fricke et al. Impact of the Gaussian Approximation on the Performance of the Probabilistic Data Association MIMO Decoder Justus Ch. Fricke Information and Coding Theory Lab Faculty of Engineering University of Kiel Kaiserstrafie 2 24143 Kiel Germany Email jf@ Magnus Sandell Toshiba Research Europe Ltd. Telecommunications Research Laboratory 32 Queen Square Bristol BS1 4ND UK Email Jan Mietzner Information and Coding Theory Lab Faculty of Engineering University of Kiel Kaiserstrafie 2 24143 Kiel Germany Em ail jm@ Peter A. Hoeher Information and Coding Theory Lab Faculty of Engineering University of Kiel Kaiserstrafie 2 24143 Kiel Germany Email ph@ Received 1 March 2005 Revised 24 July 2005 Recommended for Publication by Michael Gastpar The probabilistic data association PDA decoder is investigated for use in coded multiple-input multiple-output MIMO systems and its strengths and weaknesses are determined. The conventional PDA decoder includes two approximations. The received symbols are assumed to be statistically independent and a Gaussian approximation is applied for the interference and noise term. We provide an analytical formula for the exact probability density function PDF of the interference and noise term which is used to discuss the impact of the Gaussian approximation in the presence of a soft-input soft-output channel decoder. The results obtained resemble those obtained for the well-known PDA multiuser detector in coded CDMA systems for which similar investigations have been done before. Keywords and phrases probabilistic data association MIMO systems stochastic approximation iterative methods interference. 1. INTRODUCTION AND BACKGROUND Probabilistic data association PDA has originally been developed for target tracking by Yaakov Bar-Shalom in the 1970s. Since then it has been applied in .