基于全变差和压缩感知的小带宽超分辨TOA估计  

Super-resolution TOA estimation for small bandwidth signal using total variation and compressive sensing

作　　者：雷文华[1] 胡海冰[1] 周毅[1] 

机构地区：[1]西藏大学理学院,西藏拉萨850000

出　　处：《电子技术应用》2014年第10期60-62,共3页Application of Electronic Technique

摘　　要：在一些被动雷达中,当目标回波信号的时宽带宽积较小时,采用传统脉冲压缩估计TOA的分辨率较低,对小时宽带宽积信号目标回波TOA进行有效估计是这些被动雷达面临的重要问题。对此提出了一种基于全变差和压缩感知的小时宽带宽积信号超分辨TOA估计方法。首先通过全变差滤波消除小时宽带宽积信号频带内的色噪声,然后利用压缩感知重构携带目标回波的TOA的稀疏信号,最后通过恒虚警检测获得目标的超分辨TOA估计。仿真实验证明了该方法的有效性。In some passive radars,the time-bandwidth product of a target echo is significantly small,therefore,the TOA resolution of pulse compression is deficient and effective estimation of target＇s TOA becomes an important issue.In this paper,a method based on total variation and compressive sensing is proposed to perform super-resolution TOA estimation for small timebandwidth product signal.First,the color noise in signal frequency band is filtered through total variation technique.Then,a sparse signal containing targets＇ TOAs is reconstructed by a reconstruction algorithm of compressive sensing.Finally,a constant false alarm rate （CFAR） detection is performed to obtain estimates of targets＇ TOAs with super-resolution.The simulation examples indicate the effectiveness of the proposed method.

关 键 词：超分辨TOA 被动雷达 全变差 小时宽带宽积 压缩感知 

分 类 号：TN958[电子电信—信号与信息处理]