摘要
分析了线性调频(LFM)信号Fourier变换幅度谱的表达式,并分析了其幅度最大值对应的频率,提出了以两次FFT为基础的LFM信号参数估计方法;为了提高信号低信噪比情况下参数估计精度,提出了一种非对称加窗方法。仿真和实验结果表明了该算法的有效性。
The amplitude spectrum of Fourier transform of linear frequency modulation（LFM） signal was analyzed, and the frequency of its maximum amplitude was picked. A new algorithm based on two FFT for LFM signal parameter estimation was proposed. Meanwhile, the way of adding windows which improves the estimation precision under low sigrial-to-noise（SNR） was applied. The simulation result shows the efficiency of the algorithm.
出处
《弹箭与制导学报》
CSCD
北大核心
2008年第4期279-281,287,共4页
Journal of Projectiles,Rockets,Missiles and Guidance
基金
国家自然科学基金(60572143)资助
关键词
线性调频信号
FFT
参数估计
linear frequency modulation signal
FFT
parameter estimation
