{"title":"无源干扰源反射雷达信号的相干性","authors":"E. V. Legovtsova, E. S. Fitasov","doi":"10.1007/s11141-023-10234-2","DOIUrl":null,"url":null,"abstract":"<div><div><p>We analyze the coherence degree of the radar signals reflected from the passive-interference sources with different spectral characteristics determined by different wind velocities. The entropy of the distribution of eigenvalues of the interference correlation matrix is used as a quantitative measure of the coherence degree of interference. It is shown that the entropy value can be used for estimating the maximum coefficient of the passive-interference suppression. The dependences of the coefficient of the passive-interference suppression on the rms width of the interference spectrum for various values of the process sampling length and the wavelength are given. The coherence of an additive mixture of the signals, which are reflected from the interference and the target, is estimated. It is shown that the coherence measure of radar signals in the form of the entropy of the distribution of the signal over eigensubspaces of its correlation matrix allows one to estimate the maximum subinterference visibility.</p></div></div>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.8000,"publicationDate":"2023-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Coherence of Radar Signals Reflected From Passive-Interference Sources\",\"authors\":\"E. V. Legovtsova, E. S. Fitasov\",\"doi\":\"10.1007/s11141-023-10234-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div><p>We analyze the coherence degree of the radar signals reflected from the passive-interference sources with different spectral characteristics determined by different wind velocities. The entropy of the distribution of eigenvalues of the interference correlation matrix is used as a quantitative measure of the coherence degree of interference. It is shown that the entropy value can be used for estimating the maximum coefficient of the passive-interference suppression. The dependences of the coefficient of the passive-interference suppression on the rms width of the interference spectrum for various values of the process sampling length and the wavelength are given. The coherence of an additive mixture of the signals, which are reflected from the interference and the target, is estimated. It is shown that the coherence measure of radar signals in the form of the entropy of the distribution of the signal over eigensubspaces of its correlation matrix allows one to estimate the maximum subinterference visibility.</p></div></div>\",\"PeriodicalId\":748,\"journal\":{\"name\":\"Radiophysics and Quantum Electronics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.8000,\"publicationDate\":\"2023-04-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Radiophysics and Quantum Electronics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11141-023-10234-2\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Radiophysics and Quantum Electronics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s11141-023-10234-2","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
Coherence of Radar Signals Reflected From Passive-Interference Sources
We analyze the coherence degree of the radar signals reflected from the passive-interference sources with different spectral characteristics determined by different wind velocities. The entropy of the distribution of eigenvalues of the interference correlation matrix is used as a quantitative measure of the coherence degree of interference. It is shown that the entropy value can be used for estimating the maximum coefficient of the passive-interference suppression. The dependences of the coefficient of the passive-interference suppression on the rms width of the interference spectrum for various values of the process sampling length and the wavelength are given. The coherence of an additive mixture of the signals, which are reflected from the interference and the target, is estimated. It is shown that the coherence measure of radar signals in the form of the entropy of the distribution of the signal over eigensubspaces of its correlation matrix allows one to estimate the maximum subinterference visibility.
期刊介绍：
Radiophysics and Quantum Electronics contains the most recent and best Russian research on topics such as:
Radio astronomy;
Plasma astrophysics;
Ionospheric, atmospheric and oceanic physics;
Radiowave propagation;
Quantum radiophysics;
Pphysics of oscillations and waves;
Physics of plasmas;
Statistical radiophysics;
Electrodynamics;
Vacuum and plasma electronics;
Acoustics;
Solid-state electronics.
Radiophysics and Quantum Electronics is a translation of the Russian journal Izvestiya VUZ. Radiofizika, published by the Radiophysical Research Institute and N.I. Lobachevsky State University at Nizhnii Novgorod, Russia. The Russian volume-year is published in English beginning in April.
All articles are peer-reviewed.
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