tailieunhanh - Báo cáo hóa học: " Research Article Performance Analysis of Space-Time Block Codes in Flat Fading MIMO Channels with Offsets"

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 Performance Analysis of Space-Time Block Codes in Flat Fading MIMO Channels with Offsets | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2007 Article ID 30548 7 pages doi 2007 30548 Research Article Performance Analysis of Space-Time Block Codes in Flat Fading MIMO Channels with Offsets Manav R. Bhatnagar 1 R. Vishwanath 2 and Vaibhav Bhatnagar3 1 Department of Informatics UniK-University Graduate Center University of Oslo 2027 Kjeller Norway 2 Department of Electrical and Computer Engineering University of California Davis CA95616 USA 3 Department of Electrical Engineering University of Bridgeport Bridgeport CT 06604 USA Received 19 June 2006 Revised 14 October 2006 Accepted 11 February 2007 Recommended by Yonghui Li We consider the effect of imperfect carrier offset compensation on the performance of space-time block codes. The symbol error rate SER for orthogonal space-time block code OSTBC is derived here by taking into account the carrier offset and the resulting imperfect channel state information CSI in Rayleigh flat fading MIMO wireless channels with offsets. Copyright 2007 Manav R. Bhatnagar 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 Use of space-time codes with multiple transmit antennas has generated a lot of interest for increasing spectral efficiency as well as improved performance in wireless communications. Although the literature on space-time coding is quite rich now the orthogonal designs of Alamouti 1 Tarokh et al. 2 3 Naguib and Seshadri 4 remain popular. The strength of orthogonal designs is that these lead to simple optimal receiver structure due to the possibility of decoupled detection along orthogonal dimensions of space and time. Presence of a frequency offset between the transmitter and receiver which could arrive due to oscillator instabilities or relative motion between the two .