摘要
为了克服传统的全域搜索法在旋转LFM信号参数估计过程的繁琐问题,提出基于分数阶傅里叶变换(FRFT)与魏格纳分布(WVD)的旋转LFM信号参数估计方法。通过分析旋转LFM信号的性质和特性,给出了该信号的FRFT形式。基于WVD良好的时频分辨率,得到了清晰的调频信号时频分布,并且给出旋转LFM信号参数估计的具体步骤。仿真实验结果表明,该方法有效可行。
To solve the complicated problem in estimation of the rotated LFMsignal parameters by traditional full search method, a new estimation method for the rotated LFM signal parameter based on FRFT （Fractional Fourier Transform） and WVD （Wigner-Ville distribution） is proposed. By analyzing the nature and characteristics of the rotated LFM signal, the FRFT form of the signal is acquired. Based on the good time-frequency resolution of WVD, a clear time-frequency distribution of the rotated LFM signal isachieved. This paper also gives the specific estimation method for rotated LFM signal parameter. Simulation results show that this method is effective and feasible.
出处
《通信技术》
2012年第12期33-36,共4页
Communications Technology
