实高斯信号下的能量检测技术  

Energy Detection under Real-valued Gaussian Signal

作　　者：刘会衡[1,2] 胡健[1] 

机构地区：[1]江西理工大学应用科学学院,江西赣州341000 [2]武汉理工大学信息工程学院,湖北武汉430070

出　　处：《通信技术》2011年第8期13-15,共3页Communications Technology

基　　金：江西理工大学科研基金项目计划（No.jxxj10118）.

摘　　要：认知无线电被认为是目前提高频谱资源利用率的最有效手段。次用户要使用主用户的空闲频段,必须能够准确的检测到主用户是否出现。能量检测技术由于无需信号的任何先念知识,应用最为广泛。在实高斯信号下,对基于能量的独立检测和协作检测方式进行了仿真研究。仿真结果表明:信号样本数和参与协作的用户数的增加可以有效地改善系统检测性能,但当用户数达到一定数目后,错误率基本无变化,反而还会增加系统开销。Cognitive radio is one of the most effective techniques for the improvement of spectrum utilization efficiency.In order to utilize the idle frequency bands of primary users,the cognitive radio users should detect accurately whether the primary user is active.Energy detection is widely employed in spectrum sensing for its no demand for any priori knowledge of the signal.Independent and cooperative detection based on energy under real-valued Gaussian is studied and simulated.The simulation results show that the system detection performance could be improved when the numbers of cooperative users and samples are increased.However,the error rate would have no change,while the system overhead be raised when too many users take part in the cooperation.

关 键 词：能量检测 实高斯信号 认知无线电 协作检测 

分 类 号：TN911[电子电信—通信与信息系统]