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Báo cáo hóa học: " Research Article Canceling Interferences for High Data Rate Time Reversal MIMO UWB System: A Precoding Approach"

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 Canceling Interferences for High Data Rate Time Reversal MIMO UWB System: A Precoding Approach | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2011 Article ID 959478 10 pages doi 10.1155 2011 959478 Research Article Canceling Interferences for High Data Rate Time Reversal MIMO UWB System A Precoding Approach Taotao Wang and Tiejun Lv School of Information and Communication Engineering Beijing University of Posts and Telecommunications BUPT Beijing 100876 China Correspondence should be addressed to Tiejun Lv lvtiejun@bupt.edu.cn Received 3 December 2010 Accepted 9 February 2011 Academic Editor Sangarapillai Lambotharan Copyright 2011 T. Wang and T. Lv. 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. An ultra-high data rate time reversal TR multiple-input multiple-output MIMO ultra-wideband UWB communication system with space-time precoding is proposed. When the symbol duration is set to approach the duration of UWB monocycles the data rate is close to the limit resulting in the severe intersymbol interference ISI . The zero-forcing ZF criterion-based spacetime precoding presented in this paper eliminates both ISI and multistream interference MSI caused by spatial multiplexing at the sampling time. With less demand for the degree of freedom the number of antennas than other existing schemes the proposed scheme enables the data rate to reach the order of Gbps without losing bit error rate BER performance. Since TR signal preprocessing and the proposed precoding both require the channel state information CSI a simple but effective channel estimation algorithm is also proposed to evaluate the impact of channel estimation on the proposed scheme. 1. Introduction Ultra-wideband UWB impulse radio communications as a promising candidate for location-aware indoor communications wireless sensor networks WSN and wireless personal area network WPAN has received .