无线电工程2016，Vol.46Issue(10)：24-28,5.DOI:10.3969/j.issn.1003-3106.2016.10.06
数字干涉仪时域频域鉴相性能对比的理论分析
Theoretical Analysis on Performance Comparison of Phase Discrimination in Time Domain and Frequency Domain for Digital Interferometer
摘要
Abstract
The theoretical analysis and research on performance of phase discrimination for digital interferometer are very necessary.After its working principle is briefly introduced,the mathematic models for phase discrimination in time domain and frequency domain are established respectively.The equivalence between phase discrimination in time domain and cross correlation of two channels can be found easily.The theoretical analysis on the error of phase discrimination has shown that both methods provide non⁃bias estima⁃tions for phase difference between channels,but the error variance of phase discrimination in frequency domain is much less than that of the time domain.This characteristic is more obvious in condition of small SNR (Signal to Noise power Ratio).The theoretical analysis completely fits the simulation.It is theoretically proved that the performance of phase discrimination in frequency domain is much better than that of time domain,and it is also better than that of cross correlation processing of two channels.关键词
数字干涉仪/时域鉴相/互相关处理/频域鉴相/鉴相性能Key words
digital interferometer/phase discrimination in time domain/cross correlation processing/phase discrimination in fre-quency domain/performance of phase discrimination分类
信息技术与安全科学引用本文复制引用
石荣,李潇,邓科..数字干涉仪时域频域鉴相性能对比的理论分析[J].无线电工程,2016,46(10):24-28,5.基金项目
总装共用技术基金资助项目（91X0A210XXX1XDZ390XX）。 （）
