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2011 11th Mediterranean Microwave Symposium (MMS)最新文献

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Design of a planar multifunctions antenna 平面多功能天线的设计
2011 11th Mediterranean Microwave Symposium (MMS) Pub Date : 2011-11-03 DOI: 10.1109/MMS.2011.6068530
A. Elsayed Ahmad, M. Thevenot, Moustapha Salah Toubet, G. Lerideau, J. Floc'h
{"title":"Design of a planar multifunctions antenna","authors":"A. Elsayed Ahmad, M. Thevenot, Moustapha Salah Toubet, G. Lerideau, J. Floc'h","doi":"10.1109/MMS.2011.6068530","DOIUrl":"https://doi.org/10.1109/MMS.2011.6068530","url":null,"abstract":"In this paper, a prototype antenna has been designed and manufactured. For the patch array, the feed network has been designed to deal with the couplings. Our numerical validations have proved that the connection between the feed network and the patches array achieves the objective radiation pattern. This method can provide a very low axial ratio of the order of 3 dB over a wide angular aperture [−30°, 30°] in all planes ϕ. For the WPA, the bandwidth of this type of antenna is narrow. The achieved prototype, presents performances similar to those obtained in simulation The major work in this paper has been on the patch array.","PeriodicalId":176786,"journal":{"name":"2011 11th Mediterranean Microwave Symposium (MMS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114623248","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
Impacts of adaptive modulation on system level design for IEEE802.22 Cognitive Radio receiver 自适应调制对IEEE802.22认知无线电接收机系统级设计的影响
2011 11th Mediterranean Microwave Symposium (MMS) Pub Date : 2011-11-03 DOI: 10.1109/MMS.2011.6068555
Rami Ben Amira, D. Ayadi, M. Loulou
{"title":"Impacts of adaptive modulation on system level design for IEEE802.22 Cognitive Radio receiver","authors":"Rami Ben Amira, D. Ayadi, M. Loulou","doi":"10.1109/MMS.2011.6068555","DOIUrl":"https://doi.org/10.1109/MMS.2011.6068555","url":null,"abstract":"This paper demonstrates a system level design of a Cognitive Radio (CR) receiver that supports IEEE 802.22 Standard. In this work, we put a special interest on the impact of adaptive modulation on the design of the Radio Frequency (RF) receiver Front-End. Its architecture is based on super-heterodyne receiver supporting Sub-Band Sensing technique. In this study, the IEEE 802.22 radio system characteristics are dispatched throughout the different RF receiver blocks. Besides, theoretical computation and various techniques of the system level design are developed. Simulation results for RF characteristics such as noise figure (NF), linearity (third order intercept point, (IIP3)), gain, and output power are introduced. The obtained specifications for each RF block proved that its linearity and NF requirements are related to its own gain performance. The receiver performs a total gain of 54dB and an IIP3 of −17.8dBm for low gain mode. It achieves 105dB as gain, IIP3 of −23.7dBm and a noise figure of 6.6dB for high gain mode.","PeriodicalId":176786,"journal":{"name":"2011 11th Mediterranean Microwave Symposium (MMS)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117140879","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
Buoy-to-ship experimental measurements over sea at 5.8 GHz near urban environments 城市附近海域5.8 GHz的浮标对船实验测量
2011 11th Mediterranean Microwave Symposium (MMS) Pub Date : 2011-11-03 DOI: 10.1109/MMS.2011.6068590
J. C. Reyes-Guerrero, Miguel Bruno, L. Mariscal, A. Medouri
{"title":"Buoy-to-ship experimental measurements over sea at 5.8 GHz near urban environments","authors":"J. C. Reyes-Guerrero, Miguel Bruno, L. Mariscal, A. Medouri","doi":"10.1109/MMS.2011.6068590","DOIUrl":"https://doi.org/10.1109/MMS.2011.6068590","url":null,"abstract":"Current marine wireless communication systems used for monitoring applications based on buoys suffer from lots of weakness. Many research works concern the design and development of new technological applications to improve marine communications. Particularly, a wireless communication system based on WiMAX standard at the 5.8 GHz band (license-exempt band) could be a good candidate. As an initial task, a propagation channel measurement campaign in maritime environments was carried out to investigate the impact of the wireless channel in different situations. This work provides large scale path loss measurements over sea around urban environments. In particular, a radio link between a buoy and a ship at 5.8 GHz is studied. NLOS (Non-Line-Of-Sight) paths are investigated in depth and they are compared to LOS (Line-Of-Sight) paths. The designed measurement system is described and the experimental measurements are shown. An empirical model is obtained using these experimental data and the key wireless channel parameters are analyzed. In addition, the empirical model is compared to the free space and two-ray theoretical models. This investigation is useful, among others, for planning Worldwide Interoperability for Microwave Access (WiMAX) networks offshore around these challenge environments.","PeriodicalId":176786,"journal":{"name":"2011 11th Mediterranean Microwave Symposium (MMS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127983445","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: 41
BER perfermance of GMSK modulation under radio mobile propagation environments 无线电移动传播环境下GMSK调制的误码率性能
2011 11th Mediterranean Microwave Symposium (MMS) Pub Date : 2011-11-03 DOI: 10.1109/MMS.2011.6068586
S. Ghnimi, A. Rajhi, A. Gharsallah
{"title":"BER perfermance of GMSK modulation under radio mobile propagation environments","authors":"S. Ghnimi, A. Rajhi, A. Gharsallah","doi":"10.1109/MMS.2011.6068586","DOIUrl":"https://doi.org/10.1109/MMS.2011.6068586","url":null,"abstract":"This paper treats the BER performance of GMSK modulation under different radio mobile environments. Studies of GSM performances in various radio mobile environments such as in AWGN channel and in multipath fading channel (one path fading and four path fading cases) were performed. A random data was used as an input to the simulation program in the Matlab environment and the output was stored in the form of Bit Error Rate (BER) as a function of signal-to-noise ratio (Eb/No).","PeriodicalId":176786,"journal":{"name":"2011 11th Mediterranean Microwave Symposium (MMS)","volume":"601 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116329770","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 digital Doherty transmitter suitable for wireless infrastructure efficiency enhancement 一种适用于无线基础设施效率提高的数字多尔蒂发射机
2011 11th Mediterranean Microwave Symposium (MMS) Pub Date : 2011-11-03 DOI: 10.1109/MMS.2011.6068550
R. Darraji, F. Ghannouchi
{"title":"A digital Doherty transmitter suitable for wireless infrastructure efficiency enhancement","authors":"R. Darraji, F. Ghannouchi","doi":"10.1109/MMS.2011.6068550","DOIUrl":"https://doi.org/10.1109/MMS.2011.6068550","url":null,"abstract":"The present work proposes a digital Doherty power amplifier (PA) with improved efficiency performance. The efficiency enhancement is achieved by using a digital adaptive phase alignment mechanism that is implemented to address the problem of power-dependent phase imbalance between the carrier and peaking cells of gallium-nitride (GaN) Doherty PAs following the turn-on of the peaking cell. An average efficiency of 57% has been measured using a one-carrier Worldwide Interoperability for Microwave Access (WiMAX) signal with a peak-to-average power ratio of 7 dB. This corresponds to an improvement of 7% in average efficiency with no linearity degradation compared to a conventional single-input fully analog Doherty PA.","PeriodicalId":176786,"journal":{"name":"2011 11th Mediterranean Microwave Symposium (MMS)","volume":"221 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134303916","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
Neural Network compensator based MMSE receiver for HPA nonlinearity in MIMO OFDM systems 基于神经网络补偿器的MMSE接收机用于MIMO OFDM系统中HPA非线性
2011 11th Mediterranean Microwave Symposium (MMS) Pub Date : 2011-11-03 DOI: 10.1109/MMS.2011.6068575
M. Dakhli, R. Zayani, R. Bouallègue
{"title":"Neural Network compensator based MMSE receiver for HPA nonlinearity in MIMO OFDM systems","authors":"M. Dakhli, R. Zayani, R. Bouallègue","doi":"10.1109/MMS.2011.6068575","DOIUrl":"https://doi.org/10.1109/MMS.2011.6068575","url":null,"abstract":"In this paper, we present a method based on Neural Network (NN) technique and accompanied with MMSE (Minimum Mean Square Error), which corrects at the receiver level, the Non-Linear (NL) distortions due to the HPA (High Power Amplifier). The neural network consists on a feed-forward Multi-Layer Perceptron (MLP) associated with Levenberg-Marquardt learning algorithm. The results show that the neural network compensator brings perceptible in a complete VBLAST MIMO OFDM (Vertical Bell Laboratories Layered Space-Time Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing) system running under a Rayleigh fading channel.","PeriodicalId":176786,"journal":{"name":"2011 11th Mediterranean Microwave Symposium (MMS)","volume":"4656 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129977965","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
Spatial complexity prediction for H.264 rate control H.264速率控制的空间复杂度预测
2011 11th Mediterranean Microwave Symposium (MMS) Pub Date : 2011-11-03 DOI: 10.1109/MMS.2011.6068568
BenHajyoussef Anis, T. Ezzedine, Bouallegue Ammar
{"title":"Spatial complexity prediction for H.264 rate control","authors":"BenHajyoussef Anis, T. Ezzedine, Bouallegue Ammar","doi":"10.1109/MMS.2011.6068568","DOIUrl":"https://doi.org/10.1109/MMS.2011.6068568","url":null,"abstract":"This contribution presents an analysis of spatial complexity prediction for H.264 rate control. A macroblock based model is proposed showing that we can take profit of the spatial correlation of macroblocks complexity and offering an improvement in coding efficiency. We compare our algorithm to JVT-G012 rate control algorithm and demonstrate that we can improve the prediction error by17 % and the video quality by 0.17dB.","PeriodicalId":176786,"journal":{"name":"2011 11th Mediterranean Microwave Symposium (MMS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125946234","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
Theoretical and experimental characterization of distributed analog phase shifter 分布式模拟移相器的理论与实验表征
2011 11th Mediterranean Microwave Symposium (MMS) Pub Date : 2011-11-03 DOI: 10.1109/MMS.2011.6068584
M. Ould-Elhassen, M. Mabrouk, A. Ghazel, P. Benech
{"title":"Theoretical and experimental characterization of distributed analog phase shifter","authors":"M. Ould-Elhassen, M. Mabrouk, A. Ghazel, P. Benech","doi":"10.1109/MMS.2011.6068584","DOIUrl":"https://doi.org/10.1109/MMS.2011.6068584","url":null,"abstract":"This paper describes a theoretical study and experimental characterization of distributed phase shifter based on CPW line loaded by MACOM varactor diode. A circuit simulation combined with electro-magnetic simulation is presented and compared with measurement. In this work, we present also an impedance matching method allows adapting our phase shifter without additional circuit. The expression of phase shifting is obtained through the global ABCD matrix of proposed phase shifter circuit and compared with the measurement. The simulations are carried out on Matlab and ADS (Momentum) software's, a comparison between two simulations and measurement of fabricated phase shifter is made in order to validate the theoretical modeling and experimental characterization, good agreement is obtained.","PeriodicalId":176786,"journal":{"name":"2011 11th Mediterranean Microwave Symposium (MMS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123989880","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: 1
Caracterization of the materials used as GSM and DCS antenna in free space 在自由空间中用作GSM和DCS天线的材料的特性
2011 11th Mediterranean Microwave Symposium (MMS) Pub Date : 2011-11-03 DOI: 10.1109/MMS.2011.6068578
Lamia Zarral, F. Ndagijimana
{"title":"Caracterization of the materials used as GSM and DCS antenna in free space","authors":"Lamia Zarral, F. Ndagijimana","doi":"10.1109/MMS.2011.6068578","DOIUrl":"https://doi.org/10.1109/MMS.2011.6068578","url":null,"abstract":"The use of new materials constitutes an alternative to solve the problems involved in progress of electronics nowadays. The good knowledge of the electric materials parameters is a need. For this reasons, we have developed a broad-band technique for measuring the complex relative permittivity (ε*) of dielectric materials. Our method is based on the use of a measurement bench in free space, using two antenna Vivaldi which are simulated; one used to produce electromagnetic wave and the second is to resave the electromagnetic wave. The materials are placed between the two antennas to be characterized. Many results are obtained with S parameters in transmission, using the vectorial analysis. To extract the complex permittivity we use a mathematical model.","PeriodicalId":176786,"journal":{"name":"2011 11th Mediterranean Microwave Symposium (MMS)","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122755845","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: 1
Wideband circularly polarized conical dielectric resonator antenna 宽带圆极化锥形介质谐振器天线
2011 11th Mediterranean Microwave Symposium (MMS) Pub Date : 2011-11-03 DOI: 10.1109/MMS.2011.6068576
Raggad Hedi, L. Mohamed, Razban Tchanguiz, G. Ali
{"title":"Wideband circularly polarized conical dielectric resonator antenna","authors":"Raggad Hedi, L. Mohamed, Razban Tchanguiz, G. Ali","doi":"10.1109/MMS.2011.6068576","DOIUrl":"https://doi.org/10.1109/MMS.2011.6068576","url":null,"abstract":"A wideband circularly polarized (CP) conical dielectric resonator antennas (DRA) is investigated in this paper. The DRA is excited by a single 45 inclined slot fed by a microstrip feed line. The inclination of the slot creates a circular polarization of the radiated wave. The gain of the dielectric resonator antenna varies between 4.8 and 7.2 dBi. This study analyze also à parametric study on the effect size of dielectric resonator on bandwidth and coefficient of reflection. The reflection coefficient, AR, radiation pattern, and antenna gain of are studied, and reasonable agreement between the measured and simulated results is observed","PeriodicalId":176786,"journal":{"name":"2011 11th Mediterranean Microwave Symposium (MMS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130131235","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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