典型线性调频信号的时频分布特征提取  

Feature Extraction on Time-Frequency Distribution of Typical LFM Signal

作　　者：付霖宇[1] 张鑫[1] 程永茂[1] 曹建[1] 崔欣辰[1] 

机构地区：[1]海军航空工程学院兵器科学与技术系,烟台264000

出　　处：《舰船电子工程》2013年第11期52-55,共4页Ship Electronic Engineering

摘　　要：为提取复杂电磁环境下典型线性调频信号(LFM)脉内调制参数,采用模糊函数、短时Fourier变换、Wigner-Ville分布等时频分析方法,得到了对应的LFM信号时频分布特征。对高斯白噪声背景下多分量LFM信号时频分布的能量聚集性、交叉项分布及噪声抑制能力进行了理论分析,并通过仿真实验验证了LFM信号时频分布特征提取效果。To extract intra pulse modulation parameters of typical linear FM signal（LFM） in complicated electromagnetic environment, some time-frequency analysis methods such as ambiguity function, short-time Fourier transform, Wigner-Ville distribution, have been used to obtain corresponding LFM signal time-frequency distribution features. The energy concentration, cross terms distribution and noise sup- pression capability of multicomponent LFM signal time-frequency distribution have been analyzed with Gaussian white noise. Experiment and simulations are made to verify the results of LFM signal time-frequency distribution feature extraction.

关 键 词：线性调频 时频分布 特征提取 

分 类 号：TN974[电子电信—信号与信息处理]