Frequency estimation method of data extension based on autocorrelation

CHEN Peng; TU Ya-qing; LI Ming; LIU Peng

doi:10.13873/J.1000-9787(2019)04-0026-04

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Frequency estimation method of data extension based on autocorrelation

更新时间：2025-09-11

- Frequency estimation method of data extension based on autocorrelation
- Issue 4, Pages: 26-29(2019)
- 作者机构：
  
  1. 陆军勤务学院
  2. 陆军工程大学通信士官学校
- 作者简介：
- 基金信息：
- DOI：10.13873/J.1000-9787(2019)04-0026-04
  CLC： TN911.23
- Published：2019
- 稿件说明：
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CHEN Peng, TU Ya-qing, LI Ming, et al. Frequency estimation method of data extension based on autocorrelation[J]. 2019, (4): 26-29.
DOI：

CHEN Peng, TU Ya-qing, LI Ming, et al. Frequency estimation method of data extension based on autocorrelation[J]. 2019, (4): 26-29. DOI： 10.13873/J.1000-9787(2019)04-0026-04.

摘要

为提高自相关法在非整周期采样情况下的频率估计精度

提出一种基于自相关的数据延拓式频率估计方法。通过分析自相关法频率估计存在误差的根本原因

得出抑制频率估计误差的方法:对采样信号频率进行预估计;对自相关信号长度是否整周期进行判断

并进行数据延拓使自相关信号长度恰好或者近似为整周期;对延拓后信号进行频率估计。通过仿真实验表明:提出的方法不受信号非整周期采样的影响

有效地提高了频率估计精度。

Abstract

In order to improve the precision of the autocorrelation method for frequency estimation under noninteger period sampling circumstance

a frequency estimation method of data extension based on autocorrelation is proposed. By analyzing on generation reason of frequency estimation error based on autocorrelation method

the method for restraining frequency estimation error is deduced. Firstly

frequency of sampled signal is pre-estimated.Then

if auto-correlation signal length is full period or not is judged

and data extension is carried out to make the length of autocorrelation signal equal or close to integer periods. At last

frequency of signal after extension is estimated. Simulation results indicate that the proposed method is not affected by non-integer period sampling and can improve the precision of frequency estimation effectively.

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