{"title":"Frequency-selective distortion in continuous-wave radar displacement sensor","authors":"Changzhan Gu, Changzhi Li","doi":"10.1049/EL.2012.2451","DOIUrl":null,"url":null,"abstract":"Displacement measurement based on a continuous-wave (CW) sensor suffers from frequency-dependent signal distortion that is caused by harmonics generated by nonlinear phase modulation. Analysed is the signal distortion problem in AC-coupled CW radar sensors, which may lead to false signal demodulation but has been neglected in the past. It is found that the signal distortion comes from the loss of spectrum characteristics as the signal goes through the AC-coupled receiver chain. Both simulations and experimental results show that the ribbon-like signal distortion decreases as the target motion frequency increases. Furthermore, a guideline for solving the frequency-selective distortion issue in continuous-wave radar displacement sensors is presented.","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"9 1","pages":"1495-1497"},"PeriodicalIF":0.8000,"publicationDate":"2012-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1049/EL.2012.2451","citationCount":"10","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electronics Letters","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1049/EL.2012.2451","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 10
Abstract
Displacement measurement based on a continuous-wave (CW) sensor suffers from frequency-dependent signal distortion that is caused by harmonics generated by nonlinear phase modulation. Analysed is the signal distortion problem in AC-coupled CW radar sensors, which may lead to false signal demodulation but has been neglected in the past. It is found that the signal distortion comes from the loss of spectrum characteristics as the signal goes through the AC-coupled receiver chain. Both simulations and experimental results show that the ribbon-like signal distortion decreases as the target motion frequency increases. Furthermore, a guideline for solving the frequency-selective distortion issue in continuous-wave radar displacement sensors is presented.
期刊介绍：
Electronics Letters is an internationally renowned peer-reviewed rapid-communication journal that publishes short original research papers every two weeks. Its broad and interdisciplinary scope covers the latest developments in all electronic engineering related fields including communication, biomedical, optical and device technologies. Electronics Letters also provides further insight into some of the latest developments through special features and interviews.
Scope
As a journal at the forefront of its field, Electronics Letters publishes papers covering all themes of electronic and electrical engineering. The major themes of the journal are listed below.
Antennas and Propagation
Biomedical and Bioinspired Technologies, Signal Processing and Applications
Control Engineering
Electromagnetism: Theory, Materials and Devices
Electronic Circuits and Systems
Image, Video and Vision Processing and Applications
Information, Computing and Communications
Instrumentation and Measurement
Microwave Technology
Optical Communications
Photonics and Opto-Electronics
Power Electronics, Energy and Sustainability
Radar, Sonar and Navigation
Semiconductor Technology
Signal Processing
MIMO
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