基于压缩感知的地面运动目标成像方法  

Imaging method of ground moving targets based on compressed sensing

作　　者：顾福飞[1] 张群[1] 梁颖[1] 杨秋[1] 孙凤莲[1] 

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077

出　　处：《电波科学学报》2013年第4期764-770,共7页Chinese Journal of Radio Science

基　　金：国家重点基础研究发展计划(973计划)项目(No.2010CB731905);国家自然科学基金(No.61172169);广西无线宽带通信与信号处理重点实验室2011年度开放基金项目(No.21102)

摘　　要：针对地面运动目标成像数据量过大不便于数据存储和传输的问题,提出了一种基于压缩感知的地面运动目标成像方法.该方法对沿距离向脉冲压缩之后的数据进行双通道的相位中心偏置天线杂波对消处理,获取地面运动目标的数据信息,沿方位向进行低维观测获得压缩的回波数据,利用分数阶傅里叶变换矩阵作为稀疏基矩阵,并结合平滑l0算法实现最终的运动目标成像,利用获得的最优阶数进行运动目标的参数估计.仿真实验验证了所提方法的有效性和可行性.The amount of echo data is huge in ground moving targets imaging, which severely increases data transmission and storage load. To solve this problem, an imaging method of ground moving targets is proposed based on compressed sens-ing. Firstly, the displaced phase center antenna （DPCA） technique is induced to cancel the pulse compression echo data in the range direction with dual-channels. Secondly, the echo data in the azimuth direction is compressed by using the low di-mensional measurement matrix, and the discrete fractional Fourier transform ma-trix is adopted as the sparse basis matrix. Then the smoothing ι0 algorithm is uti lized to reconstruct the moving targets, and the moving parameters of moving tar-gets can be obtained by the optimal orders. Finally, the feasibility and effectiveness of the proposed method is proved by the simulation results.

关 键 词：离散分数阶傅里叶变换 压缩感知 相位中心偏置天线 运动目标 参数估计 

分 类 号：TN957[电子电信—信号与信息处理]