標題: Multi-Agent Distributed Beamforming With Improper Gaussian Signaling for MIMO Interference Broadcast Channels
作者: Lin, Jhe-Yi
Chang, Ronald Y.
Lee, Chia-Han
Tsao, Hen-Wai
Su, Hsuan-Jung
電機工程學系
電信工程研究所
Department of Electrical and Computer Engineering
Institute of Communications Engineering
關鍵字: Multiple-input multiple-output interference broadcast channel (MIMO-IBC);cloud radio access network (C-RAN);alternating direction method of multipliers (ADMM);multi-agent optimization;distributed beamforming;improper signaling
公開日期: 1-Jan-2019
摘要: For rate optimization in interference limited networks, improper Gaussian signaling has shown its ability to outperform conventional proper Gaussian signaling. In this paper, we study a weighted sum-rate maximization problem with improper Gaussian signaling for the multiple-input multiple-output interference broadcast channel. To solve this nonconvex and NP-hard problem, we propose an effective separate covariance and pseudo-covariance matrices optimization algorithm. In the covariance optimization, a weighted minimum mean square error algorithm is adopted, and in the pseudo-covariance optimization, an alternating optimization (AO) algorithm is proposed, which guarantees convergence to a stationary solution and ensures a sum-rate improvement over proper Gaussian signaling. An alternating direction method of multipliers-based multi-agent distributed algorithm is proposed to solve an AO subproblem with the globally optimal solution in a parallel and scalable fashion. The proposed scheme exhibits favorable convergence, optimality, and complexity properties for future large-scale networks. The simulation results demonstrate the superior sum-rate performance of the proposed algorithm as compared with the existing schemes with proper as well as improper Gaussian signaling under various network configurations.
URI: http://dx.doi.org/10.1109/TWC.2018.2878030
http://hdl.handle.net/11536/148735
ISSN: 1536-1276
DOI: 10.1109/TWC.2018.2878030
期刊: IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
Volume: 18
起始頁: 136
結束頁: 151
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