BD PRECODING SCHEMES FOR COGNITIVE MIMO SYSTEM
This paper focuses on pre-coding schemes for the downlink of multiple user multi-input multi-output (MU-MIMO) system in cognitive radio (CR) network. The spectrum band can be utilized by allowing a number of cognitive users to coexist with primary users (PUs) through a pre-coding scheme. The capacity problems maximize the sum rate of CUs subject to the interference constraint for PUs and total transmitted power constraint can be solved with high complexity. To simplify the problem, this paper presents two suboptimal precoding schemes that pre-cancel the co-channel interference to PUs as well as mitigate interference between cognitive users (CUs). Simulation results show that the two suboptimal algorithms are able to achieve high sum rate throughput with low complexity.
pre-coding cognitive radio BD MUMIMO
Caihong Zhang Li Guo
Laboratory of Digital Signal Processing,Beijing University of Posts and Telecommunications
国际会议
北京
英文
11-15
2009-11-06（万方平台首次上网日期，不代表论文的发表时间）