A new method for estimation of orthogonal and phase deviations of constant-envelope signals

doi:10.1088/1361-6501/aa8b1f

NTSC-IR

	A new method for estimation of orthogonal and phase deviations of constant-envelope signals
	Li,Youyang; Lu,Xiaochun; Wang,Xue
	2017-11-21
发表期刊	Measurement Science and Technology
ISSN	0957-0233
卷号	28 期号:12
摘要	Abstract In this paper it is shown that orthogonal deviation increases the ranging error of navigation signals, and a method for the estimation of orthogonal and phase deviation of the I and Q components of a constant-envelope signal is proposed. A measurement process is introduced and the measurement accuracy for different signal-to-noise ratios and data lengths is provided. Moreover, in the process of evaluation, a very important conclusion is made: when a digital signal is filtered, the filter bandwidth does not affect measurement accuracy. The corresponding proof is given. The accuracy of the proposed method and measurement is verified by simulations. In simulations, an expectation-maximum (EM) algorithm was used to estimate the constellation coordinates, and the shortcomings of the EM algorithm in high-precision parameter estimation were determined and the corresponding corrections made. Finally, the proposed method was used to estimate both orthogonal deviation and phase deviation of a real satellite signal.
关键词	constellation diagram Gauss mixture model EM algorithm orthogonal deviation phase deviation
DOI	10.1088/1361-6501/aa8b1f
语种	英语
WOS记录号	IOP:0957-0233-28-12-aa8b1f
出版者	IOP Publishing
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/10690
专题	中国科学院国家授时中心
作者单位	National Time Service Center, Chinese Academy of Sciences, Lintong, 710600, CN, United States of America
推荐引用方式 GB/T 7714	Li,Youyang,Lu,Xiaochun,Wang,Xue. A new method for estimation of orthogonal and phase deviations of constant-envelope signals[J]. Measurement Science and Technology,2017,28(12).
APA	Li,Youyang,Lu,Xiaochun,&Wang,Xue.(2017).A new method for estimation of orthogonal and phase deviations of constant-envelope signals.Measurement Science and Technology,28(12).
MLA	Li,Youyang,et al."A new method for estimation of orthogonal and phase deviations of constant-envelope signals".Measurement Science and Technology 28.12(2017).