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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 雷达目标的离散极化扫描
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) 色散介质中窄带信号持续时间随路径长度增加的变化（矩量法框架内）
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 振荡理论经典问题中因果关系的数量特征
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 数字天线阵列系统有源干扰下宽带信号的匹配时空滤波
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
Using A Posteriori Moments for Estimating Orientations of Antennas of Radio Engineering Systems 利用后验矩估计无线电工程系统天线方向
IF 0.8 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-02-04 DOI: 10.1007/s11141-025-10361-y
E. G. Chub, V. A. Pogorelov
{"title":"Using A Posteriori Moments for Estimating Orientations of Antennas of Radio Engineering Systems","authors":"E. G. Chub,&nbsp;V. A. Pogorelov","doi":"10.1007/s11141-025-10361-y","DOIUrl":"10.1007/s11141-025-10361-y","url":null,"abstract":"<p>Based on the approximation of the <i>a posteriori</i> probability density of a multidimensional Markov process by a system of <i>a posteriori</i> moments, an algorithm for nonlinear stochastic filtering of the antenna state vector of a radio-engineering system has been developed. The proposed suboptimal filter makes it possible to estimate the angles of head, roll, and pitch according to the indications of a global satellite navigation system using three spaced antennas. The advantage of using the proposed method compared with the widely used Kalman filter is shown in the case of non-Gaussian presentation of the state vector.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 2","pages":"139 - 156"},"PeriodicalIF":0.8,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379759","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
Analysis of the Center-End-Fed Dipole Antenna Excited by a Rectangular Waveguide 矩形波导激励下的中心端馈偶极子天线分析
IF 0.8 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-02-04 DOI: 10.1007/s11141-025-10360-z
A. P. Gorbachev, A. A. Kolesnikov
{"title":"Analysis of the Center-End-Fed Dipole Antenna Excited by a Rectangular Waveguide","authors":"A. P. Gorbachev,&nbsp;A. A. Kolesnikov","doi":"10.1007/s11141-025-10360-z","DOIUrl":"10.1007/s11141-025-10360-z","url":null,"abstract":"<p>We present an analysis of a dipole antenna fed by a rectangular waveguide. The antenna is based on a recently proposed center-end-fed dipole radiator protected by the corresponding patent of the Russian Federation. The radiation resistance and the complex input impedance of such an antenna are determined by using the mirror image theory and the induced electromotive force method. The principles of choosing the optimal antenna-wire radii and the size of the waveguide wide wall are discussed. The experimental results confirm that the proposed approach is correct.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 2","pages":"126 - 138"},"PeriodicalIF":0.8,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379758","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
Influence of the Method of Preparation of the Atomic Frequency Comb on the Quantum Memory Efficiency 原子频率梳的制备方法对量子存储效率的影响
IF 0.8 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-02-03 DOI: 10.1007/s11141-025-10359-6
R. A. Akhmedzhanov, L. A. Gushchin, I. V. Zelensky, V. A. Nizov, N. A. Nizov, D. A. Sobgaida
{"title":"Influence of the Method of Preparation of the Atomic Frequency Comb on the Quantum Memory Efficiency","authors":"R. A. Akhmedzhanov,&nbsp;L. A. Gushchin,&nbsp;I. V. Zelensky,&nbsp;V. A. Nizov,&nbsp;N. A. Nizov,&nbsp;D. A. Sobgaida","doi":"10.1007/s11141-025-10359-6","DOIUrl":"10.1007/s11141-025-10359-6","url":null,"abstract":"<p>We demonstrate an implementation of the quantum memory based on the atomic frequency comb protocol in a YLiF<sub>4</sub> crystal doped with Nd ions. Two methods are used for creating the comb: one employs long pulses at different frequencies and the other involves a train of short monochromatic pulses. These methods are compared for two different samples and different numbers of radiation passes through the samples.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 2","pages":"121 - 125"},"PeriodicalIF":0.8,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379757","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
Quantum Key Distribution Protocol Using Axially Symmetric Polarization Beams in an Atmospheric Channel 大气信道中轴对称偏振光束的量子密钥分配协议
IF 0.8 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-01-07 DOI: 10.1007/s11141-025-10352-z
D. D. Reshetnikov, A. L. Sokolov, E. A. Vashukevich, V. M. Petrov, T. Yu. Golubeva
{"title":"Quantum Key Distribution Protocol Using Axially Symmetric Polarization Beams in an Atmospheric Channel","authors":"D. D. Reshetnikov,&nbsp;A. L. Sokolov,&nbsp;E. A. Vashukevich,&nbsp;V. M. Petrov,&nbsp;T. Yu. Golubeva","doi":"10.1007/s11141-025-10352-z","DOIUrl":"10.1007/s11141-025-10352-z","url":null,"abstract":"<p>We propose a quantum key distribution protocol using axially symmetric polarization beams invariant to rotation of the radial coordinate in a plane that is normal to the beam propagation axis. A description and a method for generating vector beams with an axially symmetric polarization structure, which are formed by a vector superposition of the Hermite–Gaussian modes with indices 10 and 01 are given. It is shown that axial polarization symmetry renders such beams insensitive to rotations relative to the optical axis, which makes it possible to use them for transmitting information in cryptographic protocols in space communication systems. The mechanism of mode formation using radial polarizers and cube corner reflectors is shown in detail. Although a classical communication channel can be organized using radial polarizers, the inclusion of non-unitary elements in a quantum communication channel destroys its cryptographic strength. Therefore, we consider the procedure for detecting phase shifts in the configuration of the Mach–Zehnder interferometer whose elements are cube corner reflectors.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 1","pages":"51 - 63"},"PeriodicalIF":0.8,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142976551","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
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