基于直线检测的两种LFM信号时频变换性能的比较  

Comparison of Performance Between Two LFM Signals Time-Frequency Transform Using Line Detection

作　　者：李涛[1] 侯舒娟[1] 曾海彬[2] 吴嗣亮[1] 

机构地区：[1]北京理工大学信息科学技术学院电子工程系 [2]北京跟踪与通信技术研究所,北京100094

出　　处：《北京理工大学学报》2008年第7期622-625,634,共5页Transactions of Beijing Institute of Technology

基　　金：国家部委预研项目(020045089)

摘　　要：为了比较Wigner-Hough变换(WHT)和Radon-Ambiguity变换(RAT)之间的差别,利用平稳高斯随机过程各态遍历特性,推导了RAT在采样点数较多的情况下,采样点数与输入、输出信噪比之间的关系表达式.从变换的实现方法、运算量及分辨率等方面与WHT进行了比较.仿真结果表明,基于解线频调法的WHT更适合低信噪比下线性调频(LFM)信号检测和估计.In order to compare the differences between the Wigner-Hough transform（WHT） and Radon-Ambiguity transform（RAT）, the expression of input,output signal noise ratio（SNR） and sampling points are deduced basaed on the ergodic property of stationary Gaussian stochastic process, under cases of large sampling points. The realization, computational burden and resolution of RAT are compared with WHT. Simulations testified that WHT by dechirping is more suitable for LFM signals detection and estimation at low SNR.

关 键 词：WIGNER-HOUGH变换 RADON-AMBIGUITY变换 差别 

分 类 号：TN957.51[电子电信—信号与信息处理]