发布求助
文献互助 智能选刊 最新文献

Radiophysics and Quantum Electronics最新文献

筛选
英文 中文
Resolution of Signal Sources Via Eigenvalue Analysis of the Sample Correlation Matrix
IF 0.8 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-03-10 DOI: 10.1007/s11141-025-10368-5
O. E. Kudryashova, E. S. Fitasov, A. D. Iliyasafov
{"title":"Resolution of Signal Sources Via Eigenvalue Analysis of the Sample Correlation Matrix","authors":"O. E. Kudryashova,&nbsp;E. S. Fitasov,&nbsp;A. D. Iliyasafov","doi":"10.1007/s11141-025-10368-5","DOIUrl":"10.1007/s11141-025-10368-5","url":null,"abstract":"<p>We analyze statistical properties of resolving two signal sources with plane wavefronts via eigenvalue analysis of the sample correlation matrix of the intrinsic noise of the receiving system for a low signal-to-noise ratio. The analysis was carried out both for the signals of the same power and in the presence of a single high-power interference source. The resolution properties of two sources with different signal arrival angles are also considered. The distribution of the maximum noise eigenvalue in the presence of a weak signal source is studied numerically.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 3","pages":"230 - 239"},"PeriodicalIF":0.8,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Method of Using Forward Scattered Field for Detecting Slow-Moving Objects at a Railway Crossing
IF 0.8 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-03-08 DOI: 10.1007/s11141-025-10370-x
D. M. Balashova, V. N. Burov, A. A. Kuzin, A. V. Myakinkov, R. S. Fadeev, A. G. Ryndyk, S. A. Shabalin
{"title":"Method of Using Forward Scattered Field for Detecting Slow-Moving Objects at a Railway Crossing","authors":"D. M. Balashova,&nbsp;V. N. Burov,&nbsp;A. A. Kuzin,&nbsp;A. V. Myakinkov,&nbsp;R. S. Fadeev,&nbsp;A. G. Ryndyk,&nbsp;S. A. Shabalin","doi":"10.1007/s11141-025-10370-x","DOIUrl":"10.1007/s11141-025-10370-x","url":null,"abstract":"<p>Railway crossings are sources of increased danger for railway operation and road traffic. The efficiency of detecting low-observable targets at railway crossings can be significantly improved by using forward scatter radar (FSR) systems. This paper analyzes the potential characteristics and parameters of such systems as elements of railway crossing safety equipment. We consider a target detection method that determines the architecture of the antenna array, the probing signal parameters, and the algorithms for processing of the forward scatter signal using the FSR system of the railway crossing security equipment. We present the results of calculating the detection area of a forward scatter radar for a cube target and a motor vehicle, as well as the simulation analysis for the optimal signal processing algorithm. It is shown that the simultaneous use of two frequency ranges makes it possible to detect objects approaching the railway crossing and objects that stay in the vicinity of the railway tracks (stationary objects).</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 3","pages":"249 - 260"},"PeriodicalIF":0.8,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spatiotemporal Signal Processing in Automobile Radar Subject to Active Interference
IF 0.8 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-03-08 DOI: 10.1007/s11141-025-10371-w
V. T. Ermolaev, V. Yu. Semenov, A. G. Flaksman
{"title":"Spatiotemporal Signal Processing in Automobile Radar Subject to Active Interference","authors":"V. T. Ermolaev,&nbsp;V. Yu. Semenov,&nbsp;A. G. Flaksman","doi":"10.1007/s11141-025-10371-w","DOIUrl":"10.1007/s11141-025-10371-w","url":null,"abstract":"<p>We consider an automobile radar of millimeter wave lengths with phase-shift keyed (PSK) probing signals operating under the influence of active interference whose sources are radars of other vehicles. We propose a method of spatiotemporal processing which allows one to detect and estimate the parameters (range, velocity, and bearing) of the surrounding vehicles, which can simultaneously be both interference-free targets (own radar is turned off) and interference targets (own radar is turned on). We study the case where both linear frequency-modulated (LFM) and phasemodulated (PM) signals can be interference. The numerical-simulation results are presented, showing the high efficiency of the proposed method in terms of the probability of simultaneous detection of near and far interference and interference-free targets.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 3","pages":"261 - 269"},"PeriodicalIF":0.8,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estimation of Accuracy When Measuring the Coordinates of the Ultra-Wideband Signal Sources in the Presence of Interference
IF 0.8 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-03-08 DOI: 10.1007/s11141-025-10369-4
P. A. Trifonov, T. T. Doan
{"title":"Estimation of Accuracy When Measuring the Coordinates of the Ultra-Wideband Signal Sources in the Presence of Interference","authors":"P. A. Trifonov,&nbsp;T. T. Doan","doi":"10.1007/s11141-025-10369-4","DOIUrl":"10.1007/s11141-025-10369-4","url":null,"abstract":"<p>We show the results of estimating the accuracy of positioning a source of the ultra-wideband signals using the method for estimating the time of appearance of such signals, which are received against the background of Gaussian narrow-band interference and Gaussian white noise. We have studied the influence of the Gaussian narrow-band interference on the accuracy of positioning of the ultra-wideband signal source on the basis of the triangulation method.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 3","pages":"240 - 248"},"PeriodicalIF":0.8,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the Fundamental Influence of Drilling Noise on the Acoustic Communication Channel Through the Drill String 钻井噪声对钻柱声学通信通道的基本影响
IF 0.8 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-03-08 DOI: 10.1007/s11141-025-10365-8
V. K. Bakhtin, M. S. Deryabin, D. A. Kas’yanov, S. A. Manakov, D. R. Shakurov
{"title":"On the Fundamental Influence of Drilling Noise on the Acoustic Communication Channel Through the Drill String","authors":"V. K. Bakhtin,&nbsp;M. S. Deryabin,&nbsp;D. A. Kas’yanov,&nbsp;S. A. Manakov,&nbsp;D. R. Shakurov","doi":"10.1007/s11141-025-10365-8","DOIUrl":"10.1007/s11141-025-10365-8","url":null,"abstract":"<p>Advances in well drilling technology are increasing the need for real-time geophysical data on the drilling process. It is obvious that the most promising channel of data transmission from the bottom of the well to the surface is the acoustic communication channel through structural elements of the drill string. Currently available estimates predict that the data transmission rate through the acoustic communication channel can reach several hundred bits per second. When designing an acoustic communication channel and calculating its capacity, it is generally assumed that the noise associated with the drilling process is an additive random Gaussian process. However, direct measurements of drilling noise over a wide range of frequencies show that this assumption is incorrect. There is a high probability for the occurrence of high-amplitude spikes, and the average vibration level varies greatly over short periods of time. This paper is devoted to the study of the influence of real drilling noise on the acoustic communication channel. A digital model was developed for this purpose. The model takes into account experimentally obtained data on drilling noise that has been recorded over a long period of time in natural experiments. The results of modeling the bit error probability under different approaches to noise-tolerant coding are presented and a comparison with a Gaussian channel is made. It is shown that deviations of noise that accompanies drilling from the normal random process have a fundamental effect on the quality of communication in the acoustic data transmission channel.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 3","pages":"199 - 209"},"PeriodicalIF":0.8,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Discrete Polarization Scanning of Radar Targets
IF 0.8 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-03-08 DOI: 10.1007/s11141-025-10367-6
E. L. Shoshin
{"title":"Discrete Polarization Scanning of Radar Targets","authors":"E. L. Shoshin","doi":"10.1007/s11141-025-10367-6","DOIUrl":"10.1007/s11141-025-10367-6","url":null,"abstract":"<p>We study the properties of radio waves with equidistant polarization states. The characteristics of radio wave sequences with the same polarization proximity are given. The application of partially polarized radio wave sequences with a chosen value of the polarization proximity for measuring the differential reflectivity of precipitation is considered. Algorithms for measuring the polarization characteristics of radar targets using probing radio waves with equidistant polarization states are described.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 3","pages":"219 - 229"},"PeriodicalIF":0.8,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis of Sparse Planar Antenna Arrays for Detection and Direction Finding 用于探测和寻向的稀疏平面天线阵的合成
IF 0.8 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-03-08 DOI: 10.1007/s11141-025-10366-7
A. A. Rodionov, N. V. Savel’ev
{"title":"Synthesis of Sparse Planar Antenna Arrays for Detection and Direction Finding","authors":"A. A. Rodionov,&nbsp;N. V. Savel’ev","doi":"10.1007/s11141-025-10366-7","DOIUrl":"10.1007/s11141-025-10366-7","url":null,"abstract":"<p>We study the capabilities of nonequidistant sparse planar antenna arrays to solve the problems of detection and estimation of the source parameters. For the synthesis of nonequidistant antenna arrays with the desired characteristics, the method proposed earlier for linear arrays based on random sampling of the element positions while fixing the mean inter-element spacing is applied. This method is shown to also successfully synthesize the planar sparse arrays. The detection characteristics for the synthesized arrays are only slightly worse than those for an equidistant array. This difference can be formulated in terms of a slight deterioration of the signal-to-noise ratio (by 1–2 dB). In this case, the frequency range increases many times. This work employs the earlier proposed probabilities of correct detection and estimation, as well as the probability of an abnormal error for a quantitative description of the capabilities of the planar sparse antenna array.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 3","pages":"210 - 218"},"PeriodicalIF":0.8,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the Change in the Duration of a Narrow-Band Signal in a Dispersive Medium with Increasing Path Length (Within the Framework of the Method of Moments)
IF 0.8 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-02-06 DOI: 10.1007/s11141-025-10363-w
N. S. Bukhman
{"title":"On the Change in the Duration of a Narrow-Band Signal in a Dispersive Medium with Increasing Path Length (Within the Framework of the Method of Moments)","authors":"N. S. Bukhman","doi":"10.1007/s11141-025-10363-w","DOIUrl":"10.1007/s11141-025-10363-w","url":null,"abstract":"<p>We consider the one-dimensional problem of propagation of a narrow-band signal in a homogeneous dispersive medium. Within the framework of the method of moments, simple relations are obtained which permit one to use integration of smooth (non-oscillatory) functions to find the midpoint and r.m. s. duration of an arbitrary signal at an arbitrary point on the path without any additional approximations. It is shown that if the absorption dispersion is negligible, the square of the r.m. s. duration of the signal depends on the path length according to the parabolic law, i.e., it has a single minimum (“focus” of the signal). The possibility of reducing the duration (and the corresponding power increase) of linear frequency-modulated (LFM) signals during propagation in a dispersive medium is considered. For a space-limited dispersive medium, using the example of a weakly colliding plasma, estimates are obtained for the maximum possible (for a given path length) reduction of the signal duration and increase in its power, as well as for the initial signal parameters at which these capabilities are realized.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 2","pages":"166 - 180"},"PeriodicalIF":0.8,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantitative Characteristics of Causality in a Classical Problem of the Theory of Oscillations
IF 0.8 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-02-06 DOI: 10.1007/s11141-025-10364-9
D. A. Smirnov
{"title":"Quantitative Characteristics of Causality in a Classical Problem of the Theory of Oscillations","authors":"D. A. Smirnov","doi":"10.1007/s11141-025-10364-9","DOIUrl":"10.1007/s11141-025-10364-9","url":null,"abstract":"<p>Within the formalism of dynamic effects of directional coupling, or dynamic causal effects (DCEs), the relations between modern quantifiers of coupling between oscillatory systems (transfer entropy, Granger–Geweke causality spectrum, spectral DCEs, etc.) and the classical notions of the oscillation theory—namely, the concepts of “coupling” and “coupledness” by Mandelstam—are studied for an exemplary system of two linear dissipative stochastic oscillators. It is shown that the “coupledness” has two different meanings, which are expressed via different DCEs. A whole set of DCEs appears to be a detailed expression of the coupledness concept and provides a more accurate description of the different dynamic aspects of coupling.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 2","pages":"181 - 197"},"PeriodicalIF":0.8,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Matched Spatiotemporal Filtering of Broadband Signals in the Presence of Active Interference in Systems with Digital Antenna Arrays
IF 0.8 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-02-04 DOI: 10.1007/s11141-025-10362-x
D. N. Mukhranova, A. A. Murasev, D. O. Sokolova, A. A. Spektor
{"title":"Matched Spatiotemporal Filtering of Broadband Signals in the Presence of Active Interference in Systems with Digital Antenna Arrays","authors":"D. N. Mukhranova,&nbsp;A. A. Murasev,&nbsp;D. O. Sokolova,&nbsp;A. A. Spektor","doi":"10.1007/s11141-025-10362-x","DOIUrl":"10.1007/s11141-025-10362-x","url":null,"abstract":"<p>We consider a mathematical description of signals and interference in broadband radio systems with digital linear and planar antenna arrays. The use of the models of spatiotemporal signals is discussed. The similarity of mathematical models of signals and external active noise interference, which have been filtered in the input amplifiers of receiving devices, is studied. Multidimensional Fourier transforms leading to multidimensional spatiotemporal spectra are considered. Their localization at certain frequencies, depending on the angular direction to the radiation source is shown. With allowance for the above said, to suppress active interference, it is proposed to use multidimensional spatiotemporal matched filtering. An example of the matched filtering of an impulse signal with linear frequency modulation at a plane antenna array is proposed.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 2","pages":"157 - 165"},"PeriodicalIF":0.8,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信