标题：Sum Rate Capacity for Orthogonal Random Beamforming in Multi-Cell MIMO Scenarios
作者：Pang, Lu; Jiang, Mingyan
作者机构：[Pang, Lu; Jiang, Mingyan] Shandong Univ, Sch Informat Sci & Engn, Jinan 250100, Peoples R China.
会议名称：8th World Congress on Intelligent Control and Automation (WCICA)
会议日期：JUL 06-09, 2010
来源：2010 8TH WORLD CONGRESS ON INTELLIGENT CONTROL AND AUTOMATION (WCICA)
关键词：Orthogonal Random Beamforming (ORB); multi-cell interference;; single-cell; multi-user diversity (MUD); fairness
摘要：In multiple-antenna broadcast channels, orthogonal random beamforming (ORB) constitutes an effective mean to exploit multi-user diversity (MUD) for its inherent opportunistic attribute. However, most of recent papers just consider the single-cell hypothesis in which case multi-cell interference is completely neglected. In order to conform to the wireless environment in reality, a multi-cell model employing ORB scheme is proposed in this paper. Based on the non-quantized signal to interference plus noise ratio (SINR) feedback model, a closed-form expression of theory limit for sum rate capacity is proposed. The theory limit of single-cell model is proved to be a special case of our proposed model. Furthermore, the fairness of our model in interference limited system can be improved distinctly than that of single-cell model, at the decreasing cost of sum rate capacity. Simulation results show that the proposed model has more rationality and generality compared with single-cell model.