tailieunhanh - Báo cáo hóa học: " Research Article A Variational Approach to the Modeling of MIMO Systems"

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 A Variational Approach to the Modeling of MIMO Systems | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2007 Article ID 49350 10 pages doi 2007 49350 Research Article A Variational Approach to the Modeling of MIMO Systems A. Jraifi1 2 and E. H. Saidi1 2 1 Groupe Canal Radio Propagation Lab UFR-PHE Faculte des Sciences Rabat Morocco 2 Virtual African Centre for Basic Science and Technology VACBT Focal Point Lab UFR-PHE Faculty of Sciences Rabat Morocco Received 17 February 2006 Revised 18 June 2006 Accepted 26 March 2007 Recommended by Thushara Abhayapala Motivated by the study of the optimization of the quality of service for multiple input multiple output MIMO systems in 3G third generation we develop a method for modeling MIMO channel H. This method which uses a statistical approach is based on a variational form of the usual channel equation. The proposed equation is given by 81 8R H 8E 8R 8H E with scalar variable 8 8R . Minimum distance 8min of received vectors R is used as the random variable to model MIMO channel. This variable is of crucial importance for the performance of the transmission system as it captures the degree of interference between neighbors vectors. Then we use this approach to compute numerically the total probability of errors with respect to signal-to-noise ratio SNR and then predict the numbers of antennas. By fixing SNR variable to a specific value we extract informations on the optimal numbers of MIMO antennas. Copyright 2007 A. Jraifi and E. H. Saidi. 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 Digital communication of the third generation 3G using multi-input multi-output MIMO is one of the important techniques used to exploit the spatial diversity in a rich scattering environment 1 . This revival interest in MIMO is primarily dictated by the objective .