自适应抗干扰通信系统中频谱感知技术研究  

Research of Spectrum Sensing on Adaptive Anti-Jamming Communication System

作　　者：陈蕾[1] 姚远程[1] 秦明伟[1] 

机构地区：[1]西南科技大学信息工程学院特殊环境机器人技术四川省重点实验室,四川绵阳621002

出　　处：《电视技术》2014年第5期101-104,共4页Video Engineering

基　　金：国防基础科研计划项目(B3120133002);西南科技大学研究生创新基金项目(13ycjj34)

摘　　要：自适应抗干扰系统可根据信道的干扰情况,自动选择工作频率,充分利用信道容量,提高频谱利用率,由此如何有效、快速和准确地进行频谱空穴的检测对于通信系统的应用是非常重要的。选择能量检测算法进行频谱感知,提出一种性能评估方法,根据奈曼—皮尔逊准则动态选择阈值检验门限,在MATLAB-Simulink平台下进行建模仿真,仿真结果显示通过动态调整阈值检验门限,提高信噪比或者增加采样点数,能有效提高频谱检测性能。Adaptive anti-jamming system can automatically choose the transnfitting frequency according to the interference condition of channel, thus can make the full use of the channel capacity and can improve the spectrum utilization, thereby getting effective, rapid and accurate detection of the spectrum holes for the application of communication system is very important. Based on a paper from the national defense scientific research plan basic research program, energy detection technique is considered for spectrum sensing and the performance evaluation of an energy detector is presented. The paper implements the energy detection theory in MATLAB-Simulink ,the process of threshold selection for energy detection is addressed by the Neyman-Pearson criterion. The simulation results show that the spectrum detection performance can be significantly improved with an increase of sampling number or with the improvement of the SNR by adjusting the detection-threshold dynarnically.

关 键 词：频谱感知 能量检测 MATLAB-SIMULINK 奈曼-皮尔逊 

分 类 号：TN92[电子电信—通信与信息系统]