基于迭代检测的宽带频谱自适应感知算法  

Adaptive Spectrum Sensing for Wideband Signal Based on Iterative Detection

作　　者：刘志文 张杭[2] 孙少凡 张云峰 

机构地区：[1]北京市信息技术研究所,北京100094 [2]解放军理工大学通信工程学院卫星通信系,江苏南京210007

出　　处：《军事通信技术》2012年第3期28-32,共5页Journal of Military Communications Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2009CB320402)

摘　　要：针对多授权信号共存的宽带频谱,文章提出了一种基于迭代检测的自适应能量感知方法。通过迭代检测方式实时估计接收信号中的噪声功率和各频点的信噪比,并依据给定感知性能要求,自适应设置能量感知方法中的平均次数,提高了感知的效率。计算机仿真结果验证了所提算法的有效性。An adaptive spectrum sensing algorithm was proposed for a wideband spectrum with multi-authorized signals based on iterative detections. The algorithm iteratively estimates the current noise power and the signal of the corresponding frequency to the noise ratio, and adaptively set up the average times during the energy measurements to improve the sensing effi- ciency. Computer simulations prove the effectiveness of the proposed algorithm.

关 键 词：宽带频谱感知 自适应感知 迭代检测 多带信号 

分 类 号：TN92[电子电信—通信与信息系统]