Capacity of MIMO Broadcast Channels in Cognitive Radio Networks

摘要：

This paper investigates the sum rate capacity of MIMO broadcast channels (MIMO-BCs) in cognitive radio (CR) networks. An efficient algorithm is proposed for selecting a set of users to achieve a high sum rate capacity of the system. With the above algorithm, the sum rate capacity of MIMO-BCs in CR networks with average interference power constraints and transmit power constraints is derived. We formulate the capacity as a multi-constraint optimization problem and develop efficient algorithms to solve the problem in its equivalent form. Finally, numerical simulations are conducted to corroborate our theoretical results in Rayleigh fading environments. It is shown that the proposed method is capable of achieving a large sum rate capacity with a very low complexity.

作者: Hai-Lin Xiao Shan Ouyang Feng Zhao

作者单位: School of Information and Communications, Guilin University of Electronic Technology, Guilin 541004,Guangxi, China

会议类型: 国际会议

会议名称: 2010 International Conference on Communications,Circuits and Systems(2010年通信、电路与系统国际会议)

会议地点: 成都

会议语种:英文

页码: 10-14

在线出版日期: 2010-06-28（万方平台首次上网日期，不代表论文的发表时间）