电讯技术2018，Vol.58Issue(5)：525-531,7.DOI:10.3969/j.issn.1001-893x.2018.05.006
伪码信号辅助的CEI载波时延模糊度解算
Ambiguity Resolution of Carrier Delay in CEI System by Auxiliary of Pseudo-noise Code Signal
赵强 1侯孝民 1高亢 1焦义文1
作者信息
- 1. 航天工程大学 光电装备系,北京101416
- 折叠
摘要
Abstract
It's difficult to get a precise ambiguity value of connected elements interferometry(CEI) when the model delay is not precise or there's no model delay.For this problem,a method with the auxiliary of pseudo-noise(PN) code ranging signal is given.Under the constraint of distance of two stations,a predic-tion value of differential-delay can be calculated according to the relative position relation of PN code re-ceived by two stations.In order to improve the ability of ambiguity resolution,the basic method of PN code acquisition and tracking is introduced.The maximum precision that can be achieved under different signal-to-noise ratio(SNR) is simulated and analyzed,the results show that when the SNR is higher than 0dB,no-ambiguity phase delay can be directly solved.When the SNR is low,the wideband group delay can be solved.The experiment is repeated 1000 times under the condition of 0dB and -30dB respectively,and the correct rates are respectively 99.88% and 99.91%,which proves the effectiveness of the algorithm.关键词
深空测控/连线干涉测量/相位模糊/伪码/捕获跟踪/群时延Key words
deep space TT&C/connected element interferometry(CEI)/phase ambiguity/PN code/capture and tracking/group delay分类
信息技术与安全科学引用本文复制引用
赵强,侯孝民,高亢,焦义文..伪码信号辅助的CEI载波时延模糊度解算[J].电讯技术,2018,58(5):525-531,7.
