摘要
针对测量雷达要实时准确获得目标速度、加速度测量值的问题,提出了一种基于频谱细化的参数估计方法。在极短的时间段内,对接收到的雷达回波先求其自相关函数并作FFT,利用Chirp-Z变换细化频谱得到加速度估计值,再用此加速度补偿原回波数据,再次基于频谱细化的方法得到目标的速度估计值。该方法计算量小、估计精度高,能满足测量雷达实时高精度的要求,仿真结果验证了该方法的有效性。
To estimate the parameter of velocity and acceleration with high accuracy and in real time for the measurement radar, an improved method based on spectrum zooming is proposed. By analyzing the autocorrelation of the echo, firstly, the algorithm computes the spectrum with FFT of autocorrelation to get the narrowband spectrum of interest, and then the Chirp-Z transform is implemented to zoom the spectrum of interest in order to get the estimation of acceleration with high accuracy; finally, the velocity is obtained by using acceleration to the de-chirp signal. The proposed method has low computational cost and high performance. The computer simulation further tests the validity of this method.
出处
《电子科技》
2009年第6期58-60,共3页
Electronic Science and Technology
关键词
测量雷达
参数估计
FFT
频谱细化
measurement radar
parameter estimation
FFT
spectrum zooming
