一种在低信噪比背景下快速准确估计正弦波频率的算法

Fifth World Congress on Intelligent Control and Automation (IEEE Cat. No.04EX788) Pub Date : 2004-10-18 DOI:10.1109/WCICA.2004.1343304

Kaichun Re, Yaqing Tu, Xuanqi Zhang

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引用次数: 0

摘要

本文提出了一种估计存在严重高斯噪声的正弦波频率的新方法，该方法采用基于离散傅立叶变换和插值的粗搜索和精搜索两种方法获得准确估计的频率。将该方法应用于LFMCW雷达液位计在信噪比高达- 32db的噪声背景下的拍频估计，其距离分辨率可达0.3 mm。仿真结果表明，该方法具有较高的精度，可作为一种在线估计频率的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A fast and accurate algorithm for estimating frequency of a sine wave under low-signal-noise-ratio background

A new method of estimating frequency of a sine wave with the existence of serious Gaussian noise is proposed in this paper, in which the accurately-estimated frequency is obtained by two procedures as coarse search and fine search based on DFT and interpolation. The method is used to estimate the beat frequency of a LFMCW radar liquid-level gauge and its distance-resolution is up to 0.3 mm under noise background as serious as -32 db of signal-noise-ratio. The method, proved by simulation results, is of high accuracy and capable of being used as an on-line way of frequency estimation.

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Fifth World Congress on Intelligent Control and Automation (IEEE Cat. No.04EX788)

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