Pub Date : 2015-10-01DOI: 10.1109/WINCOM.2015.7381315
M. Bayjja, M. Moubadir, M. Boussouis, N. Touhami
In this paper, it is attempted to approach a fast efficient algorithm for solving the famous Hallen's and Pocklington's integral equations, regarding the current distribution on a finite-length linear thin wire antenna. Here, the conventional moment method in conjunction with wavelet basis functions was used to obtain the current distribution of the antenna. The aim of this work is first to introduce the application of wavelet in electromagnetic scattering, secondly a comparison of the two method of analysis the thin wire antenna. By using the wavelet expansion, wavelets as basis and testing functions, a sparse matrix is generated from the previous moment method dense matrix. A sparsely filled matrix is easier to store and invert. The result extracted from Pocklington's integral equation gives better convergence at the feeding point, though it takes more time to be computed because of the complexity in Pocklington's equation. Results are compared to the previous work done and published, excellent results are obtained.
{"title":"Analysis of dipole antennas using moment methods and haar wavelet","authors":"M. Bayjja, M. Moubadir, M. Boussouis, N. Touhami","doi":"10.1109/WINCOM.2015.7381315","DOIUrl":"https://doi.org/10.1109/WINCOM.2015.7381315","url":null,"abstract":"In this paper, it is attempted to approach a fast efficient algorithm for solving the famous Hallen's and Pocklington's integral equations, regarding the current distribution on a finite-length linear thin wire antenna. Here, the conventional moment method in conjunction with wavelet basis functions was used to obtain the current distribution of the antenna. The aim of this work is first to introduce the application of wavelet in electromagnetic scattering, secondly a comparison of the two method of analysis the thin wire antenna. By using the wavelet expansion, wavelets as basis and testing functions, a sparse matrix is generated from the previous moment method dense matrix. A sparsely filled matrix is easier to store and invert. The result extracted from Pocklington's integral equation gives better convergence at the feeding point, though it takes more time to be computed because of the complexity in Pocklington's equation. Results are compared to the previous work done and published, excellent results are obtained.","PeriodicalId":389513,"journal":{"name":"2015 International Conference on Wireless Networks and Mobile Communications (WINCOM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129991615","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}
Pub Date : 2015-10-01DOI: 10.1109/WINCOM.2015.7381331
M. Moubadir, M. Bayjja, N. Touhami, M. Aghoutane, A. Tazón
In this paper switched beam smart antenna systems are investigated to improve the performance of wireless networks. The microstrip technology of antenna arrays with Butler matrix topology as a beam-former is used to implement the switched beam smart antenna system. The optimum design of a 8×8 planar Butler matrix array, operating at 2.4 GHz for WLAN applications. Systems design and optimization was based on computer simulations.
{"title":"Design and implementation of a technology planar 8×8 Butler matrix with square truncated Edge-Fed array antenna for WLAN networks application","authors":"M. Moubadir, M. Bayjja, N. Touhami, M. Aghoutane, A. Tazón","doi":"10.1109/WINCOM.2015.7381331","DOIUrl":"https://doi.org/10.1109/WINCOM.2015.7381331","url":null,"abstract":"In this paper switched beam smart antenna systems are investigated to improve the performance of wireless networks. The microstrip technology of antenna arrays with Butler matrix topology as a beam-former is used to implement the switched beam smart antenna system. The optimum design of a 8×8 planar Butler matrix array, operating at 2.4 GHz for WLAN applications. Systems design and optimization was based on computer simulations.","PeriodicalId":389513,"journal":{"name":"2015 International Conference on Wireless Networks and Mobile Communications (WINCOM)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134439215","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}
Pub Date : 2015-10-01DOI: 10.1109/WINCOM.2015.7381333
Ahmed Zakaria Manouare, A. Idrissi, A. Ghammaz, S. Ibnyaich
A triple-frequency patch antenna with coplanar waveguide (CPW)-fed structure is presented in this paper for simultaneously satisfying wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX) applications. The proposed antenna mainly consists by three radiating elements: Stub1, Stub2 and Stub3 with a defected ground plane for band broadening. By adjusting the lengths of the three Stubs, three resonant frequencies can be achieved and adjusted separately. The simulated 10 dB bandwidth for return loss is from 2.07 to 2.73 GHz, 2.89 to 4.35 GHz and 4.6 to 7.06 GHz, covering all the 2.4/5.2/5.8 GHz WLAN bands and 2.5/3.5/5.5 GHz WiMAX bands. Furthermore, the patch antenna has a simple planar structure and occupies a small size of about 20×37 mm2; including the finite ground CPW feeding mechanism. Good dipole-like radiation characteristics over the operating bands are obtained.
{"title":"Broadband triple-band CPW-fed patch antenna for WLAN/WiMAX operations","authors":"Ahmed Zakaria Manouare, A. Idrissi, A. Ghammaz, S. Ibnyaich","doi":"10.1109/WINCOM.2015.7381333","DOIUrl":"https://doi.org/10.1109/WINCOM.2015.7381333","url":null,"abstract":"A triple-frequency patch antenna with coplanar waveguide (CPW)-fed structure is presented in this paper for simultaneously satisfying wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX) applications. The proposed antenna mainly consists by three radiating elements: Stub1, Stub2 and Stub3 with a defected ground plane for band broadening. By adjusting the lengths of the three Stubs, three resonant frequencies can be achieved and adjusted separately. The simulated 10 dB bandwidth for return loss is from 2.07 to 2.73 GHz, 2.89 to 4.35 GHz and 4.6 to 7.06 GHz, covering all the 2.4/5.2/5.8 GHz WLAN bands and 2.5/3.5/5.5 GHz WiMAX bands. Furthermore, the patch antenna has a simple planar structure and occupies a small size of about 20×37 mm2; including the finite ground CPW feeding mechanism. Good dipole-like radiation characteristics over the operating bands are obtained.","PeriodicalId":389513,"journal":{"name":"2015 International Conference on Wireless Networks and Mobile Communications (WINCOM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114160007","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}
Pub Date : 2015-10-01DOI: 10.1109/WINCOM.2015.7381299
Khalid Mrabet, Faissal El Bouanani, H. Ben-Azza
Vehicular ad-hoc networks (VANETs) are a promising communication technology. they offers many applications, which will improve traffic management and safety. Nevertheless, those applications have stringent security requirements, as they affect road traffic safety. Security requirement like authentication, privacy and Integrity are crucial to VANETs, as they avoid attacks against vehicle-to-vehicle and vehicle-to-roadside communication. In this paper, we investigate the authentication and privacy issues in VANETs. We explore the Attribute Based Signature (ABS) primitive and its variants. We then select among existing ABS literature, an efficient scheme (the best known) that achieve both traceability and user-privacy (anonymity). Finally, we propose a protocol for VANETs that uses traceable ABS in general context of multi-hop routing.
{"title":"A secure multi-hops routing for VANETs","authors":"Khalid Mrabet, Faissal El Bouanani, H. Ben-Azza","doi":"10.1109/WINCOM.2015.7381299","DOIUrl":"https://doi.org/10.1109/WINCOM.2015.7381299","url":null,"abstract":"Vehicular ad-hoc networks (VANETs) are a promising communication technology. they offers many applications, which will improve traffic management and safety. Nevertheless, those applications have stringent security requirements, as they affect road traffic safety. Security requirement like authentication, privacy and Integrity are crucial to VANETs, as they avoid attacks against vehicle-to-vehicle and vehicle-to-roadside communication. In this paper, we investigate the authentication and privacy issues in VANETs. We explore the Attribute Based Signature (ABS) primitive and its variants. We then select among existing ABS literature, an efficient scheme (the best known) that achieve both traceability and user-privacy (anonymity). Finally, we propose a protocol for VANETs that uses traceable ABS in general context of multi-hop routing.","PeriodicalId":389513,"journal":{"name":"2015 International Conference on Wireless Networks and Mobile Communications (WINCOM)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124723800","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}
Pub Date : 2015-10-01DOI: 10.1109/WINCOM.2015.7381322
Mohamed Ouaskou, M. Lahmer, M. Belkasmi
The security issues of RFID technology have been subject of a large number of research documents for over a decade. Several protocols have been developed to ensure reliable access control, namely a family of lightweight authentication protocols since Hopper and Blum proposed the HB protocol in 2001. Taking into account security and performance aspects, we present a new protocol derived from HB+ in which we add the permutation function, providing more effective resistant execution environment of active attacks and with roughly the same complexity.
{"title":"A variant of HB protocols based on permutation for low-cost RFID","authors":"Mohamed Ouaskou, M. Lahmer, M. Belkasmi","doi":"10.1109/WINCOM.2015.7381322","DOIUrl":"https://doi.org/10.1109/WINCOM.2015.7381322","url":null,"abstract":"The security issues of RFID technology have been subject of a large number of research documents for over a decade. Several protocols have been developed to ensure reliable access control, namely a family of lightweight authentication protocols since Hopper and Blum proposed the HB protocol in 2001. Taking into account security and performance aspects, we present a new protocol derived from HB+ in which we add the permutation function, providing more effective resistant execution environment of active attacks and with roughly the same complexity.","PeriodicalId":389513,"journal":{"name":"2015 International Conference on Wireless Networks and Mobile Communications (WINCOM)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125695956","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}
Pub Date : 2015-10-01DOI: 10.1109/WINCOM.2015.7381298
H. Chaibi, M. Belkasmi, Z. Mohammadi
This work reports on a characterization of the ultra wideband (UWB) outdoor channel based on a channel measurements over a frequency bandwidth of 9 GHz from 3 GHz to 9 GHz. Frequency domain measurements were conducted for line-of-sight (LOS) scenario. Firstly, obtained data measurement are characterized in terms of power distribution in both time and frequency domains. Results show that the power distribution is well fitted by Weibull distribution, and the path loss as well as the frequency dependence is characterized. Secondly, the wavelet-based denoising to improve the estimated Power Delay Profile (PDP) from Ultra Wideband UWB outdoor channel measurements was investigated. Furthermore, we investigated the second order statistics characterization of the indoor UWB measured channels through an Eigen decomposition of the auto-covariance matrix to determine the number of UWB channel DoF. In addition, we will look into the effect of the proposed denoising scheme on the UWB channel Eigen Properties.
{"title":"UWB outdoor channel characterization and modeling based on measurements","authors":"H. Chaibi, M. Belkasmi, Z. Mohammadi","doi":"10.1109/WINCOM.2015.7381298","DOIUrl":"https://doi.org/10.1109/WINCOM.2015.7381298","url":null,"abstract":"This work reports on a characterization of the ultra wideband (UWB) outdoor channel based on a channel measurements over a frequency bandwidth of 9 GHz from 3 GHz to 9 GHz. Frequency domain measurements were conducted for line-of-sight (LOS) scenario. Firstly, obtained data measurement are characterized in terms of power distribution in both time and frequency domains. Results show that the power distribution is well fitted by Weibull distribution, and the path loss as well as the frequency dependence is characterized. Secondly, the wavelet-based denoising to improve the estimated Power Delay Profile (PDP) from Ultra Wideband UWB outdoor channel measurements was investigated. Furthermore, we investigated the second order statistics characterization of the indoor UWB measured channels through an Eigen decomposition of the auto-covariance matrix to determine the number of UWB channel DoF. In addition, we will look into the effect of the proposed denoising scheme on the UWB channel Eigen Properties.","PeriodicalId":389513,"journal":{"name":"2015 International Conference on Wireless Networks and Mobile Communications (WINCOM)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125030245","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：