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báo cáo hóa học:" Research Article Diversity-Enabled and Power-Efficient Transceiver Designs for Peak-Power-Limited SIMO-OFDM 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 Diversity-Enabled and Power-Efficient Transceiver Designs for Peak-Power-Limited SIMO-OFDM Systems | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 535943 11 pages doi 10.1155 2010 535943 Research Article Diversity-Enabled and Power-Efficient Transceiver Designs for Peak-Power-Limited SIMO-OFDM Systems Qijia Liu 1 Robert J. Baxley 2 Xiaoli Ma 1 and G. Tong Zhou1 1 School of Electrical and Computer Engineering Georgia Institute of Technology 777 Atlantic Drive Atlanta GA 30332-0250 USA 2Information Technology and Telecommunications Laboratory ITTL Georgia Tech Research Institute 250 14th Street NW Atlanta GA 30318 USA Correspondence should be addressed to Qijia Liu qliu6@mail.gatech.edu Received 12 November 2009 Accepted 4 March 2010 Academic Editor Cihan Tepedelenlioglu Copyright 2010 Qijia Liu 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. Orthogonal frequency division multiplexing OFDM has been widely adopted for high data rate wireless transmissions. By deploying multiple receiving antennas single-input multiple-output- SIMO- OFDM can further enhance the performance with spatial diversity. However due to the large dynamic range of OFDM signals and the nonlinear nature of analog components it is pragmatic to model the transmitter with a peak-power constraint. A natural question to ask is whether SIMO-OFDM transmissions can still enjoy the antenna diversity in this case. In this paper the effect of the peak-power limit on the error performance of uncoded SIMO-OFDM systems is studied. In the case that the receiver has no information about the transmitter nonlinearity we show that full antenna diversity can still be collected by carefully designing the transmitters while the receiver performs a maximum ratio combining MRC method which is implemented the same as that in the average power constrained case. On the other hand when the receiver .