2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)最新文献

{"title":"Robust chaos in systems of circular geometry","authors":"V. M. Doroshenko, V. Kruglov, M. Pozdnyakov","doi":"10.1109/PIERS.2017.8262294","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8262294","url":null,"abstract":"We propose two models of systems that manifest robust chaotic regimes associated with uniformly hyperbolic attractors. The model schemes are rings of oscillators and nonlinear elements arranged in such way that signals undergo special transformation during full rotation along the rings. The models are governed by systems of ordinary differential equations. These equations were studied numerically. We discuss the results of numerical simulation that confirm our suggestion of robust hyperbolic chaos in proposed models.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122344671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Superresolution in signal processing using a priori information","authors":"B. Lagovsky, A. G. Chikhina","doi":"10.1109/ICEAA.2017.8065365","DOIUrl":"https://doi.org/10.1109/ICEAA.2017.8065365","url":null,"abstract":"The new signal processing technique is based on using the information received by each element antenna array. This method makes it possible to restore the image of radar targets with angular resolution exceeding the Rayleigh criterion, i.e., with superresolution. The suggested method allows to represent the approximate solutions in the form of series of functions. The main difficulty in the realization of this method is the instability of solutions, which is a consequence of an ill-posed problem. The suggested method allows to approach to the maximum achievable degree of superresolution.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122894673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An iterative decision directed channel estimation for multi-user MIMO systems","authors":"Guilherme Gaspar, Afonso Ferreira, P. Montezuma, M. Marques da Silva, R. Dinis","doi":"10.1109/PIERS.2017.8262401","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8262401","url":null,"abstract":"The massive use of transmit and receive antennas with perfect channel state information (CSI) in massive MIMO systems (Multiple Input Multiple Output) can lead array power gain increments proportional to the number of antennas. For CSI estimation pilots can be used, but in multi-user scenarios pilot contamination may occur which may compromise estimation, even when are used orthogonal sequences such as Chu sequences. In such conditions even a precoding does not cancel interference among users and the system performance can be compromised. It is shown that a decision directed scheme based on a iterative block frequency domain equalizer can be used to compensate the pilot contamination impact on channel estimation without sacrificing the complexity. Moreover, when the coherence time spans multiple data blocks, these most accurate channel estimates can be used to precod the subsequent blocks and thereby improve system performance. It is also presented a set of performance results that sustain our assumption.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125132446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multifunctional sensing with hybrid nanophotonic structures","authors":"D. Zuev, D. Baranov, G. Zograf, S. Makarov, K. Volodina, A. Krasilin, I. Mukhin, P. Dmitriev, V. Vinogradov, V. Milichko, E. A. Pidko","doi":"10.1109/PIERS.2017.8261982","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8261982","url":null,"abstract":"The development of multifunctional systems for investigation of different parameters involved in chemical reactions is a vital problem in case of low concentrations of tested matter. Here, we investigate hybrid plasmonic-dielectric system and demonstrate possibility of such application for multifunctional sensing.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125504487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mini- and microgenerators magnetic circuits design","authors":"P. Fiala, Z. Szabó, P. Maroon, Z. Roubal, T. Kríz","doi":"10.1109/PIERS.2017.8261711","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8261711","url":null,"abstract":"The article presents certain general conclusions obtained from an investigation of a vibration-powered minigenerator functioning as a harvester. In this context, the authors summarize the parameters that are critical in designing optimal generators to retrieve the residual energy contained in an electromechanical system and transferred through the vibrations of an independent structure. The discussion exploits our previous results, which theoretically define the properties characterizing the models of individual basic configurations of a generator based on Faraday's law of induction.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122785198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A classification technique for condensed matter phases using a combination of PCA and SVM","authors":"W. Badawi, Z. M. Osman, M. Sharkas, M. Tamazin","doi":"10.1109/PIERS.2017.8261759","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8261759","url":null,"abstract":"In quantum mechanical systems with exponentially large Hilbert space, the need to represent and identify states of quantum many-body system with few variables is of significant importance. The representation and identification of the states are based on the spin configurations of the ferromagnetic Ising model without knowledge of the respective Hamiltonian. The state identification process is of high importance in quantum technology applications and testing such as D-wave machine comparison to classical optimization algorithms using large number of qubits. This paper proposes a new method to classify phases and phase transitions in condensed matter systems, which can further be used in quantum technologies to identify the state of qubits. The proposed method is based on the combination of Principle component analysis (PCA) and support vector machine (SVM). The simulation results of the proposed method show that the trained model is able to identify the phase and phase transition with high accuracy in different Ising spin topologies with a variety of lattice sizes, while reducing the dimensionality of the feature space compared to existing optimization methods.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122583979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Developments in HF propagation predictions to support communications with aircraft on trans-polar routes","authors":"E. M. Warrington, N. Rogers, A. Stocker, D. Siddle, H. A. Al-behadili, F. Honary, M. Beharrell, D. Boteler, D. Danskin, N. Zaalov","doi":"10.1109/PIERS.2017.8262070","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8262070","url":null,"abstract":"Commercial airlines began operations over polar routes in 1999 with a small number of proving flights. By 2014 the number had increased to in excess of 12,000 flights per year, and further increases are expected. For safe operations, the aircraft have to be able to communicate with air traffic control centres at all times. This is achieved by VHF links whilst within range of the widespread network of ground stations, and by HF radio in remote areas such as the Polar regions, the North Atlantic and Pacific where VHF ground infrastructure does not exist. Furthermore, the Russian side of the pole only has HF capability. This has created a demand for improved HF nowcasting and forecasting procedures to support the polar operations, which are the subject of this paper.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116832529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The impact of signal regeneration on the DWDM system's power efficiency using 10 Gbps NRZ-OOK","authors":"D. Pavlovs, V. Bobrovs, G. Ivanovs, P. Gavars","doi":"10.1109/PIERS.2017.8262268","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8262268","url":null,"abstract":"The matter of power consumption in the wired telecommunication networks has become a major challenge for researchers and designers due to the potential financial benefits and environmental issue. On the other hand the Information and Communication Technology (ICT) segment experiencing continuously increasing global Internet traffic due to the emergence and renewal of the bandwidth-intensive services and applications. The higher capacity of transmission system can be achieved by enchasing the spectral efficiency level, which in its turn, in the Wavelength Division Multiplexing (WDM) systems, is defined by frequency slots and data rates of transmission channels. However, on the grounds of cross-channel interference, decreasing of channel spacing adversely affects the transmission reach of signals, which leads to the higher power consumption due to increased number of signal regenerations. Therefore the following situation results into continuous assessment of tradeoffs between Power and Spectral efficiencies in the transmission systems. Following research aims to an examination of Single-Line-Rate (SLR) WDM systems based on 10 Gbps signals with nonreturn-to-zero on-off-keying (NRZ-OOK) modulation, which are commonly used at existing legacy networks. The focus of this study is transmission systems with the Forward Error Correction (FEC) and required Bit Error Rate (BER) level lower then 10−3. In order to observe relationship between system's capacity and power consumption, authors estimate the power efficiency at different spectral efficiency stages, by means of modifications in the frequency slot, to wit from 12.5 GHz to 37.5GHz. Calculations have been prepared for various signal transmission lengths. Additionally, the power ratio of 3R (reamplification, retiming, reshaping) is evaluated with the purpose to quantify the impact of signal regeneration procedure on the total power consumption of transmission system. The results are presented as functions of transmitted information amount, with the aim of providing flexible data for different system realizations.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129416097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Uniform microstrip array antenna with low sidelobe level for coastal surveillance radar application at 9.37–9.43 GHz","authors":"Damaraji Wijoyono, Savira Ramadhanty, Dewa Rakmatullah, F. Zulkifli","doi":"10.1109/PIERS.2017.8262433","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8262433","url":null,"abstract":"Coastal Suveillance Radar (CSR) is crucial for coastal navigation. A microstrip rectangular patch with slotted inset-line antenna is proposed in this paper. The antenna operates at the frequency 9.37–9.43 GHz with VSWR below 1.3 and printed on Epoxy FR-4 substrate of dielectric constant of 4.6. The antenna array is also simulated on CST using uniform microstip array configuration consisting of 6×120 elements to yield the specification of horizontal beamwidth ≤ 1°, vertical beamwidth ≤ 20°, gain ≥30dB and sidelobe level ≤ −27dB. The simulation result of the array antenna has a horizontal beamwidth of 0.4°, vertical beamwidth of 14.2°, gain of 30.8dB, and sidelobe level of −27.5dB. Hence the proposed array antenna configuration is suitable for CSR application.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129826500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical study of the exciton-light coupling in quantum wells","authors":"P. Belov, E. Khramtsov, P. S. Grigoryev, I. Ignatiev","doi":"10.1109/PIERS.2017.8261746","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8261746","url":null,"abstract":"The exciton-light coupling is an important characteristic quantitatively described by the radiative decay rate. Recent experimental studies of the radiative decay rate for high-quality quantum wells show a variance of the experimental data especially for narrow quantum wells. Therefore, the theoretical and numerical studies of the exciton-light coupling as an overlap of the light wave and the exciton wave function are of significant interest. In this paper, we present the radiative decay rates obtained for excitons in the GaAs-based quantum wells of various widths from 1 nm up to 100 nm. The exciton wave function is calculated by the direct numerical solution of the three-dimensional Schrödinger equation. The precise results for the lowest exciton state are obtained by the Hamiltonian discretization using the finite-difference scheme. The numerical results are compared with the experimental data extracted from the reflectance spectroscopy measurements for high-quality GaAs/AlGaAs and InGaAs/GaAs heterostructures.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124740654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}