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 Prevoting Cancellation-Based Detection for Underdetermined MIMO Systems | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010 Article ID 932904 11 pages doi 2010 932904 Research Article Prevoting Cancellation-Based Detection for Underdetermined MIMO Systems Lin Bai 1 Chen Chen 2 and Jinho Choi1 1 School of Engineering Swansea University Swansea SA2 8PP UK 2 School of Electronics Engineering and Computer Science Peking University Beijing 100871 China Correspondence should be addressed to Chen Chen Received 29 April 2010 Revised 15 July 2010 Accepted 26 September 2010 Academic Editor A. B. Gershman Copyright 2010 Lin Bai 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. Various detection methods including the maximum likelihood ML detection have been studied for multiple-input multipleoutput MIMO systems. While it is usually assumed that the number of independent data symbols M to be transmitted by multiple antennas simultaneously is smaller than or equal to that of the receive antennas N in most cases there could be cases where M N which results in underdetermined MIMO systems. In this paper we employ the prevoting cancellation based detection for underdetermined MIMO systems and show that the proposed detectors can exploit a full receive diversity. Furthermore the prevoting vector selection criteria for the proposed detectors are taken into account to improve performance further. We also show that our proposed scheme has a lower computational complexity compared to existing approaches in particular when slow fading MIMO channels are considered. 1. Introduction The use of multiple antennas in wireless communications where the resulting system is called the multiple input multiple output MIMO system 1 can increase spectral efficiency 2 . For the symbol detection in MIMO systems it is usually .
