数据采集与处理2011，Vol.26Issue(4)：490-493,4.
基于DMFT的高动态载波捕获算法的改进
Improvement of High Dynamic Carrier Capture Based on Discrete Match Fourier Transform Algorithm
祝利轻 1卢辉斌 1易学顶 1杨雪峰1
作者信息
- 1. 燕山大学信息科学与工程学院,秦皇岛,066004
- 折叠
摘要
Abstract
The high dynamic carrier capture based on fast Fourier transform (FFT) is not applicable. Discrete match Fourier transform (DMFT) can be used in high dynamic signal. But it has poor precision and large calculation. A two-dimensional carrier capture algorithm is proposed based on the above analysis with the three combination of FFT, self-correlation and DMFT. Firstly, if-sampled signal and its delay make self-correlation, then the frequency variation rough estimate is abtained through FFT on the delay self-correlation, and the rough estimation of the initial frequency shift is obtained. After that, searching near the income value in DMFT obtain the high-precision parameter estimation. The method narrows the searching scope, reduces computation and improves the precision of estimation. The simulation results prove that the method is effective and feasible.关键词
离散匹配傅立叶变换(DMFT)/自相关/FFTKey words
discrete match Fourier transform (DMFT)/self-correlation/FFT分类
信息技术与安全科学引用本文复制引用
祝利轻,卢辉斌,易学顶,杨雪峰..基于DMFT的高动态载波捕获算法的改进[J].数据采集与处理,2011,26(4):490-493,4.
