一种两通道点频脉冲信号的频率和相位差高精度估计方法

A High-Accuracy Method for Parameter Estimation of Frequency and Phase Difference about Single-Tone Pulse Signal with Dual-Channel

为提高多通道脉冲信号的频率和相位差估计精度,针对两通道大时延点频脉冲信号的频率和相位差估计问题提出一种新的高精度估计方法。利用脉冲信号快速傅立叶变换(Fast Fourier Transform,FFT)频谱带宽内频率、相位差、时延差以及信号采样点数之间的线性关系,建立脉冲信号频率、相位差的算法模型,对频率和相位差进行精确估计,并对通道时延差精度进行评估。通过蒙特卡洛仿真试验,对比分析了几种典型算法的估计性能,验证了该方法的有效性,实验结果表明该方法具有更高的频率和相位差估计精度。

In order to improve the accuracy of the frequency and phase difference estimation of pulse signal about multichannel receiver,a high-accuracy method is proposed for the problem about dual-channel under the situation of single-tone pulse signal.A mathematical model of frequency,phase difference,time delay and sampling number is created by using the linearity relationship between them in spectrum bandwidth with method of fast Fourier transform(FFT).Then the parameters of the model are exactly calculated and the accuracy about the time delay difference is assessed.Through Monte Carlo experiment,the estimation performance of several typical mathods is compared and analyzed.The validity of the proposed method is verified,and the advantage of high performance is effectively demonstrated by simulation results.