Unbiased Adaptive Phase Difference Estimation Method in the Presence of Frequency Mismatch and Its Performance Analysis

被引：0
|
作者：
Li M. [1 ]
Shen T.-A. [1 ]
Mao Y.-W. [1 ]
机构：
[1] Department of Information and Military Logistics Engineering, Logistical Engineering University, Chongqing
来源：
Tien Tzu Hsueh Pao/Acta Electronica Sinica | 2019年 / 47卷 / 09期
关键词：
Frequency mismatch; Performance analysis; Phase difference estimation; Unbiased;
D O I：
10.3969/j.issn.0372-2112.2019.09.013
中图分类号：
学科分类号：
摘要：
For the issue of low accuracy of phase difference estimation affected by the noise under the condition of frequency mismatch, an unbiased adaptive phase difference estimation method in the presence of frequency mismatch is proposed, which could improve the accuracy of phase difference estimation and enhance the ability of anti-noise. Therefore, firstly the expansion parameters of two sinusoidal signals are adaptive estimated, which is used to estimate the phase difference between two sinusoidal signals; secondly, the deviation analysis of phase difference estimation is carried out by the expansion of Taylor series, the unbiased phase difference estimation with frequency mismatch is proved, and the performance of steady-state for phase difference estimation are also presented; consequently, the phase difference estimation results of different methods are compared, the affected by different parameters are discussed, the calculated results are provided to confirm the effectiveness and correctness of the proposed method. © 2019, Chinese Institute of Electronics. All right reserved.
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页码：1905 / 1912
页数：7
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