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: | 1-一月-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 |
顯示於類別: | 期刊論文 |