认知无线电网络基于空分复用的联合频谱共享  

Space Division Multiplexing Based Joint Spectrum Sharing in Cognitive Radio Networks

作　　者：李钊[1] 杨家玮[1] 肖丽媛[1] 

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室,西安710071

出　　处：《北京邮电大学学报》2011年第6期28-32,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家杰出青年科学基金项目(60725105);国家重点基础研究发展计划项目(2009CB320404);长江学者和创新团队发展计划项目(IRT0852);国家自然科学基金项目(61102057);高等学校引智计划项目(B08038);中央高校基本科研业务费专项资金项目(K50510010022);ISN项目(ISN1103005)

摘　　要：针对多天线认知无线电网络提出一种基于空分复用的收发联合频谱共享方法.综合利用认知通信与系统间干扰的空间相关特性,在无空闲频谱资源可用时合理选择授权系统及其频道,并以空分复用的方式实现频谱共享.相比于仅在认知基站端进行选择以及穷举搜索,该方法能获得接近最佳的系统吞吐率特性,并且具有低的复杂度.A space division multiplexing based joint transmit-receive spectrum sharing method in cognitive radio networks is proposed. By exploiting spatial correlation features between cognitive transmission and interference among different systems, appropriate primary system and its channel could be selected under the condition that no idle spectrum resource is available. Consequently, the spectrum sharing is carried out using space division multiplexing. Compared with the method implemented only at cognitive base station and exhaustive searching, the proposed scheme could achieve near-optimal system throughput performance with reduced complexity.

关 键 词：认知无线电 多天线 空分复用 波束成形 预编码 

分 类 号：TN929.5[电子电信—通信与信息系统]