Linear Precoding and Power Allocation in the Downlink of Cognitive Radio Networks

摘要：

We consider the downlink of a cognitive radio (CR) system, where secondary users (SUs) share the radio spectrum with primary users (PUs) while ensuring no harmful interference is introduced to PUs. To protect the communications of PUs and in the same time maximize the sum rate of SUs, we propose a joint linear precoding based on minimum mean-square-error (MMSE) criterion and power allocation strategy at the secondary base station (SBS) satisfying the interference power constraints at PUs and the total transmit power constraint for SUs. Simulation results show that the proposed algorithm convergents efficiently and can improve the sum rate of SUs considerably while ensuring the quality-of-service (QoS) of PUs.

作者: Dongmei Jiang Haixia Zhang Dongfeng Yuan

作者单位: School of Information Science and Engineering, Shandong University, China School of Information Science and Engineering, Shandong University, China National Mobile Commun. Re

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: 68-72

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）