Performance of Adaptive Subchannel Assignment-Based MIMO/OFDM Systems over Multipath Fading Channels
Adaptive antenna arrays at both the base and mobile stations can further increase system capacity and improve the quality of service of conventional orthogonal frequency division multiplexing (OFDM) systems. Conventional adaptive antenna array-based multiple-input multiple-output (MIMO)/OFDM systems use the sub-carriers characterized by the largest eigenvalue to transmit the OFDM symbols. This paper describes the performance of adaptive subchannel assignment-based MIMO/OFDM systems over multipath fading channels. The system adaptively selects the eigenvectors associated with the relatively large subchannel eigenvalues to generate the antenna array weights at the base and mobile stations and then adaptively assigns the corresponding best subchannels to transmit the OFDM symbols. Simulation results show that the proposed system can achieve better performance than the conventional adaptive antenna array-based MIMO/OFDM system over multipath fading channels.
作 者： PAN Yahan Khaled Ben Letaief CAO Zhigang 作者单位： PAN Yahan(Nanjing Telecommunication Technology Institute, Nanjing 210007, China;State Key Laboratory on Microwave and Digital Communications, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China)Khaled Ben Letaief(Center for Wireless Information Technology, Department of Electrical and Electronic Engineering, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, China)
CAO Zhigang(State Key Laboratory on Microwave and Digital Communications, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China)
刊 名： 清华大学学报（英文版） EI 英文刊名： TSINGHUA SCIENCE AND TECHNOLOGY 年，卷(期)： 2006 11(1) 分类号： O4 关键词： multiple-input multiple-output (MIMO)/orthogonal frequency division multiplexing (OFDM) adaptive subchannel assignment joint transmit and receive antenna array weighting multipath fading channel