基于WVD的LFM信号检测方法研究  

Research on method of LFM signal detection based on Wigner-Ville distribution

作　　者：张学俊[1] 梁晨[2] 糜玉林[1] 孙涛[1] 宋瑞华[1] 

机构地区：[1]海军航空工程学院,山东烟台264001 [2]大连大学信息工程学院,辽宁大连116622

出　　处：《物联网技术》2013年第4期29-32,共4页Internet of things technologies

摘　　要：对基于Wigner-Ville分布的LFM信号检测方法进行了总结,推导了加性高斯白噪声背景下的Wigner-Hough变换信噪比公式,并分别采用Wigner-Ville分布和Wigner-Hough变换对单线性调频信号、两线性调频信号进行了检测,然后对检测性能进行了分析。仿真结果表明,与Wigner-Ville分布相比,Wigner-Hough变换可有效抑制高斯白噪声的影响,同时对交叉项也有很好的消除作用。The method of linear frequency modulation （LFM） signal detection based on Wigner-Ville distribution is summed up, and the SNR formula of Wigner-Hough transform in the background of additive Gaussian white noise is derived. A detection of single linear FM signal and two-linear FM signal is conducted by using the Wigner-Ville distribution and the Wigner-Hough transform. The detected result is analyzed. Simulation results show that Wigner-Hough transform performs better than the Wigner-Ville distribution in the active suppression of Gaussian white noise, and has a good elimination effect on cross term.

关 键 词：线性调频信号 时频分析 WIGNER-VILLE分布 WIGNER-HOUGH变换 

分 类 号：TN914.5[电子电信—通信与信息系统]