Joint Power Allocation and Subchannel-Pairing for Two-Way MIMO-OFDM Relay System
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概要
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In this paper, we study the problem of joint resource allocation in the two-way relay system, where a pair of multi-antenna users wish to exchange information via multi-antenna amplify-and-forward relay under orthogonal frequency-division multiplexing (OFDM) modulation. We formulate a sum-rate maximization problem subject to a limited power constraint for each user and relay. Our resource allocation strategy aims at finding the best pairing scheme and optimal power allocation over subchannels in frequency and space domains. This turns out to be a mixed integer programming problem. We then derive an asymptotically optimal solution though the Lagrange dual decomposition approach. Finally, simulation results are provided to demonstrate the performance gain of the proposed algorithms.
著者
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Zhu Shihua
Department Of Information And Communication Engineering Xi'an Jiaotong University
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Liao Xuewen
Department Of Information And Communication Engineering Xi'an Jiaotong University
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JIANG Qi
Department of Information and Communication Engineering, Xi'an Jiaotong University
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Wang Wei
Department of Anesthesiology, China-Japan Friendship Hospital, the Chinese Ministry of Health, Beijing, China
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WANG Wei
Department of Electrical Engineering and Computer Science, South Dakota State University
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