TAILIEUCHUNG - Báo cáo hóa học: " Research Article Reverse Link Outage Probabilities of Multicarrier CDMA Systems with Beamforming in the Presence of Carrier Frequency Offset"

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 Reverse Link Outage Probabilities of Multicarrier CDMA Systems with Beamforming in the Presence of Carrier Frequency Offset | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2008 Article ID 218740 9 pages doi 2008 218740 Research Article Reverse Link Outage Probabilities of Multicarrier CDMA Systems with Beamforming in the Presence of Carrier Frequency Offset Xiaoyu Hu and Yu-Dong Yao Wireless Information System Engineering Laboratory WISELAB Department of Electrical and Computer Engineering Stevens Institute of Technology Hoboken NJ 07030 USA Correspondence should be addressed to Yu-Dong Yao Received 30 April 2007 Revised 28 August 2007 Accepted 25 September 2007 Recommended by Hikmet Sari The outage probability of reverse link multicarrier MC code-division multiple access CDMA systems with beamforming in the presence of carrier frequency offset CFO is studied. A conventional uniform linear array ULA beamformer is utilized. An independent Nakagami fading channel is assumed for each subcarrier of all users. The outage probability is first investigated under a scenario where perfect beamforming is assumed. A closed form expression of the outage probability is derived. The impact of different types of beamforming impairments on the outage probability is then evaluated including direction-of-arrival DOA estimation errors angle spreads and mutual couplings. Numerical results show that the outage probability improves significantly as the number of antenna elements increases. The effect of CFO on the outage probability is reduced significantly when the beamforming technique is employed. Also it is seen that small beamforming impairments DOA estimation errors and angle spreads only affect the outage probability very slightly and the mutual coupling between adjacent antenna elements does not affect the outage probability noticeably. Copyright 2008 X. Hu and . Yao. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction .

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