A new method for estimation of orthogonal and phase deviations of constant-envelope signals
文献类型：期刊论文
| 作者 | Li,Youyang; Lu,Xiaochun; Wang,Xue |
| 刊名 | Measurement Science and Technology
 |
| 出版日期 | 2017-11-21 |
| 卷号 | 28期号:12 |
| 关键词 | constellation diagram Gauss mixture model EM algorithm orthogonal deviation phase deviation |
| ISSN号 | 0957-0233 |
| DOI | 10.1088/1361-6501/aa8b1f |
| 英文摘要 | 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. |
| 语种 | 英语 |
| WOS记录号 | IOP:0957-0233-28-12-AA8B1F |
| 出版者 | IOP Publishing |
| 源URL | [http://210.72.145.45/handle/361003/10689]  |
| 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). |
入库方式： OAI收割
来源：国家授时中心
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