基于频率相位估计的连线干涉测量DOR信号处理与分析

Processing and Analysis on DOR Signal in CEI Based on Frequency and Phase Estimation

介绍连线干涉测量的测量原理,在分析相位差频率初相估计算法的基础上,指出算法在频率偏差边界处存在频率、相位估计不稳定的问题,采用Rife算法对其进行改进,并应用改进后的频率初相估计算法实现了DOR仿真信号的时延测量。测试信号和实测数据处理结果表明了改进算法的正确性,同时证明了连线干涉测量时延测量精度高的特点。

The measurement principle of CEI is introduced.The phase difference algorithm is analyzed and the problem that the estimations of frequency and phase are not stable when the frequency difference is around the boundary is pointed out.In this paper the algorithm is improved by adopting the Rife algorithm.The time delay of DOR signal is simulated by the improved algorithm.The processing results of simulated signal and measured data show the validity of the improved algorithm and indicate that CEI has the merit of highly accurate time delay measure.