CR OFDM系统中基于频谱检测的资源分配算法研究  

Resources allocation algorithm based on spectrum checking in the CR OFDM systems

作　　者：杨辉联[1] 刘永年[1] 石海[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072

出　　处：《电子测量技术》2010年第1期47-50,63,共5页Electronic Measurement Technology

摘　　要：CR OFDM系统中次级用户在使用频谱空穴时,不仅要考虑没有被检测到的、距离次级系统较远的主用户在频谱空穴上的功率限制,还要受到已检测的主用户在互干扰上的干扰门限限制。提出了两个在这两种限制条件下的自适应比特分配算法:一个是采用增加最小功率分配原则的I MPA算法,另一个是采用增加最小干扰分配原则的IMIA算法。仿真结果表明,两种算法明显优于静态平均分配功率算法,且两种算法各有适合其应用的场景。In the cognitive radio OFDM systems, when using the spectrum holes, secondary users will consider not only the power constraint of the undetected primary users far from secondary system, but also the mutual interference threshold limit of the detected primary users. Two adaptive bits allocation algorithms were proposed in the two former limits： one adopted the increasing power minimum allocation principle, and the other adopted the increasing interference minimum allocation principle. Simulation results showed that the two proposed algorithms both can achieve a better preference than the static equal power allocation algorithms and have their own application scene.

关 键 词：自适应比特分配 频谱空穴 互干扰 

分 类 号：TD655.3[矿业工程—矿山机电]