信息工程大学学报2023，Vol.24Issue(6)：655-659,5.DOI:10.3969/j.issn.1671-0673.2023.06.003
基于两级傅里叶变换迭代算法的载频估计方法
Frequency Estimation Based on Two-stage Fourier Transform Iterative Method
龚佳良 1吴泽楷 2薛猛1
作者信息
- 1. 西安卫星测控中心,陕西西安 710004
- 2. 31401部队,吉林长春 130000
- 折叠
摘要
Abstract
In radar signal processing,carrier frequency estimation is particularly important.The cur-rent estimation algorithm based on two-stage M-Rife can achieve joint frequency estimation of multi-ple pulses,but the estimation accuracy is low under the condition of low signal-to-noise ratio and large estimation deviations are prone to occur.To address this problem,based on the Fourier trans-form iteration,a carrier frequency estimation method based on the two-stage Fourier transform itera-tive method is proposed.This method first uses the Fourier transform iterative method to estimate the carrier frequency of a single pulse,and then averages the estimated value of the carrier frequency of each pulse as a rough estimate of the carrier frequency,and finally uses the obtained rough estimate of the carrier frequency for down-conversion and processing.The multiple coherent pulses are equiv-alent to a sine signal,and then the Fourier transform iteration method is used to estimate the carrier frequency.Experimental results show that this method can achieve high-precision carrier frequency estimation for burst signals,with the estimation accuracy better than the estimation algorithm based on two-stage M-Rife,and it can be used in more severe transmission environments.关键词
载频估计/相参脉冲串/傅里叶变换迭代法/两级迭代法Key words
frequency estimation/coherent pulse train/Fourier transform iterative method/two-stage iterative method分类
信息技术与安全科学引用本文复制引用
龚佳良,吴泽楷,薛猛..基于两级傅里叶变换迭代算法的载频估计方法[J].信息工程大学学报,2023,24(6):655-659,5.
