基于相位差分的雷达信号参数估计方法

Radar Signal Parameter Estimation Based on Differenced Phase

由于接收信号长度有限而存在频率离散化采样的限制,FFT(Fast Fourier Transform,快速傅里叶变换)对雷达信号频率的估计精度会降低。基于相位差分的频率估计方法可以对这一偏差进行估计,从而减小FFT的估计误差。尝试将该方法应用于LFM(Linear Frequency Modulated,线性调频)信号带宽的估计问题,并对此进行了仿真验证,结果证明该方法对雷达信号频率和带宽估计有一定的应用价值。

Estimation of FFT （Fast Fourier Transform） of radar frequency is biased as a result of restrictions in res- olution in discrete frequency domain. This paper introduces a method based on differenced phase and it decreases estimation error by figuring the biased residual frequency. The method is applied to estimate the bandwidth of a chirp signal, which has been simulated in the related section and it proved to be feasible in practical application.