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학술대회 Efficient Transmit Antenna Selection for Correlated MIMO Channels
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김형수, 김현국, 김남식, 박현철, 서석, 최진규
Wireless Communications and Networking Conference (WCNC) 2009, pp.1-5
08MR5400, 이동통신 무선접속방식의 환경 적응형 자율제어 기술 연구, 김진업
While multiple-input multiple-output (MIMO) system gives many advantages to wireless communication, the complexity of multiple RF chains gives a burden to the system. Antenna selection is introduced as a technique to reduce the burden. On the transmit antenna selection scheme, the exhaustive search for optimal antenna set quickly becomes impractical as adopting more antennas. To reduce complexity for searching, we propose an efficient transmit antenna selection method. We first make a threshold for optimal antenna set by using Poincare separation theorem. Instead of exhaustive search, we select a transmit antenna subset that exceeds the threshold. On the exponentially correlated channel of array antennas, we give an order to search for reducing complexity further. We search from the most remotely located antenna subset which in generally less correlated to the closely located antennas which is more correlated. Finally, we show the BER performance and tradeoff relation between performance and complexity by Monte-Carlo simulations. © 2009 IEEE.
KSP 제안 키워드
Antenna Subset, Antenna selection scheme, Array antenna, BER performance, MIMO channel, Monte-Carlo simulation(MCS), RF chain, Selection method, Tradeoff relation, Transmit antenna selection, exhaustive search(ES)