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Performance analysis of an 80Gb/s WDM system using OQPSK modulation under FWM effect and chromatic dispersion 采用OQPSK调制的80Gb/s WDM系统在FWM效应和色散下的性能分析
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS) Pub Date : 2017-04-01 DOI: 10.1109/WITS.2017.7934663
Hanane Alifdal, F. Abdi, F. M. Abbou
{"title":"Performance analysis of an 80Gb/s WDM system using OQPSK modulation under FWM effect and chromatic dispersion","authors":"Hanane Alifdal, F. Abdi, F. M. Abbou","doi":"10.1109/WITS.2017.7934663","DOIUrl":"https://doi.org/10.1109/WITS.2017.7934663","url":null,"abstract":"This paper discusses the crosstalk due to nonlinear effects in the Wavelength division multiplexing (WDM) systems. The performance of an eight channels WDM system is tested in presence of Four Wave Mixing (FWM) to examine the Bit Error Ratio (BER) and Optical Signal to Noise Ratio (OSNR) for different chromatic dispersion values. Based on Optical Quadrature Phase Shift Keying (OQPSK) modulation, we proposed a WDM system to benefit from the multicarrier modulation properties. Through MATLAB and Optisystem software simulations we have shown, in one hand, the improvement of BER and OSNR when the chromatic dispersion coefficient is relatively high. In the other hand, we have outlined the effectiveness of the proposed system in terms of increasing the OSNR and decreasing the BER","PeriodicalId":147797,"journal":{"name":"2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132827845","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}
引用次数: 5
The integrity of the schematic heterogeneity of Moroccan geological databases 摩洛哥地质数据库示意图异质性的完整性
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS) Pub Date : 2017-04-01 DOI: 10.1109/WITS.2017.7934621
Tarik Chafiq, Rida Azmi, Hassane Jarar Oulidi, A. Fekri
{"title":"The integrity of the schematic heterogeneity of Moroccan geological databases","authors":"Tarik Chafiq, Rida Azmi, Hassane Jarar Oulidi, A. Fekri","doi":"10.1109/WITS.2017.7934621","DOIUrl":"https://doi.org/10.1109/WITS.2017.7934621","url":null,"abstract":"Exploiting and exploring the data issued from heterogeneous sources present a challenge for scientists and decision makers alike. Despite the huge explosion and the availability of geospatial data, the entities that produce them have faced increasing difficulties at the level of harmonization of this information, and especially when it is dealing with structural heterogeneity (schematic). Indeed, structural heterogeneity means that different information systems or rather providers store their data in different structures in their databases. Such variations in the scheme or models of database may limit the interoperability of spatial data. To deal with the problem of schematic heterogeneity, this paper proposes the creation of a Moroccan Model, which is used to map private or native schema (Owner scheme) to MGeoSciML model (Public scheme). Indeed, the access to the information will be based on the international standards of Open Geospatial Consortium (OGC).","PeriodicalId":147797,"journal":{"name":"2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123028463","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}
引用次数: 0
Skew detection and correction based on Hough transform and Harris corners 基于霍夫变换和哈里斯角的倾斜检测与校正
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS) Pub Date : 2017-04-01 DOI: 10.1109/WITS.2017.7934619
A. Garí, G. Khaissidi, M. Mrabti, D. Chenouni, M. el yacoubi
{"title":"Skew detection and correction based on Hough transform and Harris corners","authors":"A. Garí, G. Khaissidi, M. Mrabti, D. Chenouni, M. el yacoubi","doi":"10.1109/WITS.2017.7934619","DOIUrl":"https://doi.org/10.1109/WITS.2017.7934619","url":null,"abstract":"Skew angle detection is one of the most important component of Optical Characters Recognition (OCR) systems and documents analysis. Taking documents by the blind and visually impaired people with a mobile phone always have a degree of inclination. In this paper, a novel and an efficient method based on extraction of Harris corner features points and Hough transform is presented to estimate skew angle of printed documents. A comparative study using the ICDAR2015 database with the well-known methods in literature, shown the effectiveness and the performance of the proposed algorithm.","PeriodicalId":147797,"journal":{"name":"2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124532501","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}
引用次数: 10
Analysis and design of high output power from a two-arm coherently combined Q-switched fiber laser 双臂相干组合调q光纤激光器高输出功率的分析与设计
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS) Pub Date : 2017-04-01 DOI: 10.1109/WITS.2017.7934664
A. Nassiri, H. Idrissi-Saba
{"title":"Analysis and design of high output power from a two-arm coherently combined Q-switched fiber laser","authors":"A. Nassiri, H. Idrissi-Saba","doi":"10.1109/WITS.2017.7934664","DOIUrl":"https://doi.org/10.1109/WITS.2017.7934664","url":null,"abstract":"In this work, we have developed an analytical model of an actively Q-switched Ytterbium doped fiber laser by using two coupled cavities with amplifying fibers in Mach-Zehnder interferometer configuration. We demonstrate that this oscillator system provides record high peak power nanosecond pulse. This study shows that the energy obtained is almost twice the energy of an individual fiber laser. We have theoretically demonstrated that the coherent combining efficiency up to 99%. This concept brings some novel perspectives for scaling the high energy and high peak power of single mode Q-switched fiber lasers.","PeriodicalId":147797,"journal":{"name":"2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS)","volume":"15 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120856108","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}
引用次数: 0
Design of a low noise amplifier for LTE radio base station receivers LTE无线基站接收机低噪声放大器的设计
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS) Pub Date : 2017-04-01 DOI: 10.1109/WITS.2017.7934682
Houda Laaouane, J. Foshi, S. Bri
{"title":"Design of a low noise amplifier for LTE radio base station receivers","authors":"Houda Laaouane, J. Foshi, S. Bri","doi":"10.1109/WITS.2017.7934682","DOIUrl":"https://doi.org/10.1109/WITS.2017.7934682","url":null,"abstract":"The objective of this work is to model a low noise amplifier and study the key properties of GaN HEMT LNAs in terms of gain and noise performance, for LTE radio base station receiver front-end design. A well-designed LNA is eventually simulated using Advanced Design System. The design uses microstrip open shunt matching networks, inductors and capacities for DC Biasing. The simulation results show at 2.6 GHz a gain of 18.22 dB, noise figure of 0.34 dB, while VSWRin= 1.613 and VSWRout=1.613 with biasing voltage at 4.35 V.","PeriodicalId":147797,"journal":{"name":"2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116701547","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}
引用次数: 5
Design and implementation of a novel five-level inverter topology 一种新型五电平逆变器拓扑结构的设计与实现
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS) Pub Date : 2017-04-01 DOI: 10.1109/WITS.2017.7934641
Hajar Chadli, S. Chadli, A. Tahani, Zakariae Jebroni, A. Aziz
{"title":"Design and implementation of a novel five-level inverter topology","authors":"Hajar Chadli, S. Chadli, A. Tahani, Zakariae Jebroni, A. Aziz","doi":"10.1109/WITS.2017.7934641","DOIUrl":"https://doi.org/10.1109/WITS.2017.7934641","url":null,"abstract":"Nowadays multilevel inverters are a very attractive solution for medium-voltage high-power conversion applications; they convert DC power to AC power at required output voltage and frequency level. In the design of multilevel inverters, different topologies have been evolved. These topologies include diode clamped multilevel 1 inverter, flying capacitor multilevel inverter and cascaded H bridge multilevel inverter. The main limitations of the conventional topologies are large number of switches. This article treats the design and realization of a new five-level single-phase inverter structure controlled by a microcontroller-based digital strategy. The proposed topology needs less number of switches and carrier signals and THD of the proposed topology is less compared to conventional topologies. All circuits are modeled and simulated using Matlab-Simulink software and ISIS proteus.","PeriodicalId":147797,"journal":{"name":"2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116055376","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}
引用次数: 4
Application of spectral and time-frequency analyses to study an acoustic signal backscattered from composite cylindrical shell 应用谱分析和时频分析研究复合材料圆柱壳后向散射声信号
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS) Pub Date : 2017-04-01 DOI: 10.1109/WITS.2017.7934667
S. Agounad, Aassif El Houcein, Y. Khandouch, Domique Décultot, G. Maze
{"title":"Application of spectral and time-frequency analyses to study an acoustic signal backscattered from composite cylindrical shell","authors":"S. Agounad, Aassif El Houcein, Y. Khandouch, Domique Décultot, G. Maze","doi":"10.1109/WITS.2017.7934667","DOIUrl":"https://doi.org/10.1109/WITS.2017.7934667","url":null,"abstract":"In acoustic field, the non-destructive testing and characterization purposes are carried out from the analyzing of the acoustic scattering of a progressive plane wave from the target studied. The present paper studies the signal backscattered from the copper/polymer composite cylindrical shell submerged in a fluid medium using Fourier analysis and time-frequency method. The Fourier analysis is used to find the pulse response and the resonance frequencies of the composite cylindrical shell. From large ranges of time-frequency methods, the smoothed pseudo Wigner-Ville distribution (SPWV) is applied because of its most effective properties to study the surface waves generated by the acoustic scattering of a plane wave. The time-frequency image obtained by SPWV is used to estimate the cut-off dimensionless frequencies of the surface waves. In addition, the group delay property of the SPWV distribution is applied to study the dispersion phenomenon of the waves. At each frequency, the group delay may be estimated directly from the time-frequency plane of the wave investigated. The results achieved by time-frequency method show fair agreement with those achieved by the plane of modal identification.","PeriodicalId":147797,"journal":{"name":"2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115499918","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}
引用次数: 3
Toward an approach to improve MPPT efficiency for PV system 探讨提高光伏系统MPPT效率的方法
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS) Pub Date : 2017-04-01 DOI: 10.1109/WITS.2017.7934644
Z. Jai Andaloussi, A. Raihani, Abdelmounaim Elmagri, O. Bouattane
{"title":"Toward an approach to improve MPPT efficiency for PV system","authors":"Z. Jai Andaloussi, A. Raihani, Abdelmounaim Elmagri, O. Bouattane","doi":"10.1109/WITS.2017.7934644","DOIUrl":"https://doi.org/10.1109/WITS.2017.7934644","url":null,"abstract":"A solar photovoltaic system requires a regulation to extract the maximum of its energy taking account the atmospheric fluctuations and external disturbances [1]. In this article, we propose to study Maximum Power Point Tracking (MPPT) system, using an Automatic Selection Algorithm (ASA) to improve the efficiency of the PV system connected to a load via a DC-DC converter. The proposed ASA switch between two conventional MPPT: Incremental Conduction Algorithm (INC) [2] and Perturb and Observe (P&O) algorithm [3]). It selects automatically the algorithm which should work best according to the solar irradiance data. The study focuses on the analysis of the robustness, speed, precision and the yield of the PV system. The MATLAB/Simulink environment is used to simulate the performance of the electrical conversion systems.","PeriodicalId":147797,"journal":{"name":"2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129262160","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}
引用次数: 9
A novel design of a compact miniature microstrip low pass filter based on SRR 一种基于SRR的小型微带低通滤波器的新设计
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS) Pub Date : 2017-04-01 DOI: 10.1109/WITS.2017.7934686
B. Nasiri, A. Errkik, J. Zbitou, A. Tajmouati, L. Elabdellaoui, M. Latrach
{"title":"A novel design of a compact miniature microstrip low pass filter based on SRR","authors":"B. Nasiri, A. Errkik, J. Zbitou, A. Tajmouati, L. Elabdellaoui, M. Latrach","doi":"10.1109/WITS.2017.7934686","DOIUrl":"https://doi.org/10.1109/WITS.2017.7934686","url":null,"abstract":"In this work, a novel compact microstrip low-pass filter is designed based on square split ring resonator. The SRR is used to reduce the size of the filter and to improve the good electrical performances. The dumbbell-shaped defected ground structure is introduced into the ground plane in order to achieve a desired cutoff frequency of 1.2 GHz with a ripple level less than 0.2 dB in the pass-band and an attenuation better than 20 dB in the rejected band. The proposed filter is designed on an FR-4 substrate having a thickness of 1.6mm, a dielectric constant of 4.4 and loss tangent of 0.025. The whole area of the proposed circuit is 24×26mm2. The computed results obtained by CST microwave and Ansoft HFSS are in good agreement. The size of LPF is miniaturized by 60% compared to the conventional filter.","PeriodicalId":147797,"journal":{"name":"2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126133148","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}
引用次数: 4
Design of 45 degree microstrip phase shifter for beam forming network application using parallel coupled lines 平行耦合线45度微带移相器波束形成网络的设计
2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS) Pub Date : 2017-04-01 DOI: 10.1109/WITS.2017.7934687
S. El Marini, J. Zbitou, R. Mandry, A. Errkik, A. Tajmouati, M. Latrach
{"title":"Design of 45 degree microstrip phase shifter for beam forming network application using parallel coupled lines","authors":"S. El Marini, J. Zbitou, R. Mandry, A. Errkik, A. Tajmouati, M. Latrach","doi":"10.1109/WITS.2017.7934687","DOIUrl":"https://doi.org/10.1109/WITS.2017.7934687","url":null,"abstract":"A 45 degree differential microstrip phase shifter operating in the frequency band ranging from 1.4 GHz to 2.7 GHz is presented in this paper. It is designed by adopting the model of double parallel Schiffman phase shifter and simulated on an FR4 substrate by using two electromagnetic simulation software, ADS from Agilent technologies and CST Microwave Studio. The proposed phase shift circuit offers good results in terms of return loss, insertion loss and phase shift. Good agreement between simulated results using ADS and CST Microwave Studio is obtained.","PeriodicalId":147797,"journal":{"name":"2017 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131394302","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}
引用次数: 5
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