Super-Resolving a Frequency Band [Tips & Tricks]

IF 9.4 1区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Signal Processing Magazine Pub Date : 2023-11-08 DOI:10.1109/MSP.2023.3311592

Ruiming Guo;Thierry Blu

引用次数: 0

Abstract

This article introduces a simple formula that provides the exact frequency of a pure sinusoid from just two samples of its discrete-time Fourier transform (DTFT). Even when the signal is not a pure sinusoid, this formula still works in a very good approximation (optimally after a single refinement), paving the way for the high-resolution frequency tracking of quickly varying signals or simply improving the frequency resolution of the peaks of a discrete Fourier transform (DFT).

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超分辨频带[技巧]

本文介绍了一个简单的公式，该公式仅从离散时间傅立叶变换（DTFT）的两个样本中提供纯正弦曲线的精确频率。即使信号不是纯正弦曲线，该公式仍然以非常好的近似值工作（在一次细化后最佳），为快速变化信号的高分辨率频率跟踪或简单地提高离散傅立叶变换（DFT）峰值的频率分辨率铺平了道路。

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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来源期刊

IEEE Signal Processing Magazine 工程技术-工程：电子与电气

CiteScore

27.20

自引率

0.70%

发文量

123

审稿时长

6-12 weeks

期刊介绍： EEE Signal Processing Magazine is a publication that focuses on signal processing research and applications. It publishes tutorial-style articles, columns, and forums that cover a wide range of topics related to signal processing. The magazine aims to provide the research, educational, and professional communities with the latest technical developments, issues, and events in the field. It serves as the main communication platform for the society, addressing important matters that concern all members.

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