基于SLNR预编码的感知无线电技术  

Cognitive radiotechnique based on SLNR precoding

作　　者：王晶晶[1] 陈媛媛[1] 

机构地区：[1]海南工商职业学院,海口570203

出　　处：《电子测试》2012年第8期5-8,共4页Electronic Test

基　　金：海南省教育厅高校科学研究资助项目(Hjkj2011-56)

摘　　要：感知无线电技术允许多个感知用户之间公平协调共享频谱,由于基站在同一频率同一时隙下可以和几个移动终端同时通信,这将引起用户间的共信道干扰(CCI)。本文引入了预编码的思想,多个感知用户感知并共享频谱时在发射端加入预编码矩阵,基于信漏噪比(SLNR)的预编码同时消除了共信道干扰(CCI)和噪声,提高了感知系统性能。仿真结果说明采用了基于SLNR的预编码后系统性能得到了明显改善,且发射天线数越多,系统性能越好。The cognitive radio technique allows multi-cognitive users to share the spectrum fairly.So the base station can communicate with multi-mobile equipment in the same frequency and the same time.The cochannel interference（CCI） is brought to the multi-users in this situation.This paper uses the precoding.The cognitive users use the precoding matrix in the transmitting end.The precoding based on signal-to-leakageand-noise ratio（SLNR） improves the cognitive system performance because it makes a balance between eliminating the co-channel interference（CCI） and the noise.Simulation results prove that the performance is better obviously after using the precoding based on SLNR.The system performance is better when the transmit antenna is more.

关 键 词：感知无线电 CCI 预编码 SLNR 

分 类 号：TN925[电子电信—通信与信息系统]