发布求助
文献互助 智能选刊 最新文献

2012 29th National Radio Science Conference (NRSC)最新文献

筛选
英文 中文
B1. Nanotechnology in RF and microwave applications: Review article B1。纳米技术在射频和微波中的应用:综述
2012 29th National Radio Science Conference (NRSC) Pub Date : 2012-04-10 DOI: 10.1109/NRSC.2012.6208501
A. Attiya
{"title":"B1. Nanotechnology in RF and microwave applications: Review article","authors":"A. Attiya","doi":"10.1109/NRSC.2012.6208501","DOIUrl":"https://doi.org/10.1109/NRSC.2012.6208501","url":null,"abstract":"In this paper detailed discussions are introduced for possible applications of nanotechnology and nano-materials in RF, microwave and optical applications. The proposed discussions include different nano-materials like carbon nanotube, graphene sheets, nanowires, nano-particles of noble metals like Ag and Au, and nano-ferrite materials. On the other hand, the proposed applications include nano-antennas, passive microwave circuits, microwave transistors, flexible conducting sheets, RF conducting ink, RF absorbers and RF shielding.","PeriodicalId":109281,"journal":{"name":"2012 29th National Radio Science Conference (NRSC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121264095","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
C11. An efficient Fractional Fourier Transform approach for digital image watermarking C11。一种有效的分数阶傅里叶变换数字图像水印方法
2012 29th National Radio Science Conference (NRSC) Pub Date : 2012-04-10 DOI: 10.1109/NRSC.2012.6208529
E. Elshazly, M. Ashour, E. M. ElRabaie, A. M. Abbas
{"title":"C11. An efficient Fractional Fourier Transform approach for digital image watermarking","authors":"E. Elshazly, M. Ashour, E. M. ElRabaie, A. M. Abbas","doi":"10.1109/NRSC.2012.6208529","DOIUrl":"https://doi.org/10.1109/NRSC.2012.6208529","url":null,"abstract":"The paper presents an efficient approach for digital image watermarking based on the Fractional Fourier Transform (FRFT). In this approach, a watermark in the form of a PN sequence is embedded in the coefficients of the FRFT implemented on the image in the spatial domain or in transform domain. The FRFT is used in this paper as a means of security. The objective of using other transform domains prior to the FRFT is to make use of the details in these transforms domains. Before extraction of the watermark image, we intentionally attack the watermarked image with different common image processing attacks to test the robustness of the proposed algorithms. The proposed Discrete Wavelet Transform Fractional Fourier Transform (DWT-FRFT) algorithm gives best robustness over the other algorithms under these attacks.","PeriodicalId":109281,"journal":{"name":"2012 29th National Radio Science Conference (NRSC)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125507387","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
B17. Planar inverted-F antenna array performance for smart handsets including the interaction with a human hand-head B17。智能手机的平面倒f天线阵列性能，包括与人的手-头的交互
2012 29th National Radio Science Conference (NRSC) Pub Date : 2012-04-10 DOI: 10.1109/NRSC.2012.6208517
A. Montaser, K. Mahmoud, H. Elmikati
{"title":"B17. Planar inverted-F antenna array performance for smart handsets including the interaction with a human hand-head","authors":"A. Montaser, K. Mahmoud, H. Elmikati","doi":"10.1109/NRSC.2012.6208517","DOIUrl":"https://doi.org/10.1109/NRSC.2012.6208517","url":null,"abstract":"In this paper the interaction of the planar inverted-F antenna array, mounted on a mobile handset, with a human hand-head phantom is investigatedin the 1.9 GHz band. The hybrid approach involving the particle swarm optimization (PSO) and Nelder-Mead (NM) algorithm is considered to optimize the complex excitations of the adaptive array elements in a mutual coupling environment for different beamforming synthesis. Firstly, the effect of the human hand-head on the handset radiation characteristics is studied. Then, the spatial peak specific absorption rate (SAR) values of 4-element antenna arrays for mobile handsets in the vicinity of a human hand-head are evaluated numerically for different scenarios. The antenna is analyzed completely using finite difference time domain (FDTD)while the interaction is performed using the CST Microwave Studio software.","PeriodicalId":109281,"journal":{"name":"2012 29th National Radio Science Conference (NRSC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128626017","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: 2
C16. An efficient iris localization algorithm C16。一种高效的虹膜定位算法
2012 29th National Radio Science Conference (NRSC) Pub Date : 2012-04-10 DOI: 10.1109/NRSC.2012.6208534
M. Essam, M. Fikri, M. Elnaby, F. El-Samie
{"title":"C16. An efficient iris localization algorithm","authors":"M. Essam, M. Fikri, M. Elnaby, F. El-Samie","doi":"10.1109/NRSC.2012.6208534","DOIUrl":"https://doi.org/10.1109/NRSC.2012.6208534","url":null,"abstract":"Iris localization is an important step in iris recognition systems; all the subsequent steps, iris normalization, feature extraction and matching, depend on its accuracy. Traditional iris localization methods often involve an exhaustive search of a three-dimensional parameter space, which is a time consuming process. This paper presents a coarse-to-fine algorithm to address the computational cost problem, while achieving an acceptable accuracy. The iris gray image is transformed to a binary image using an adaptive threshold obtained from analyzing the image intensity histogram. Morphological processing is then used to extract an initial center point, which is considered as the initial center for both pupil and iris boundaries. Finally, a refinement step is made using an integrodifferential operator to get the final iris and pupil centers and radii. This system proves to be robust against occlusions and intensity variations.","PeriodicalId":109281,"journal":{"name":"2012 29th National Radio Science Conference (NRSC)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134223604","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: 7
K2. Automatic pectoral muscle boundary detection in mammograms using eigenvectors segmentation K2。基于特征向量分割的乳房x线照片胸肌边界自动检测
2012 29th National Radio Science Conference (NRSC) Pub Date : 2012-04-10 DOI: 10.1109/NRSC.2012.6208576
H. Abdellatif, T. Taha, O. Zahran, W. Al-Nauimy, F. El-Samie
{"title":"K2. Automatic pectoral muscle boundary detection in mammograms using eigenvectors segmentation","authors":"H. Abdellatif, T. Taha, O. Zahran, W. Al-Nauimy, F. El-Samie","doi":"10.1109/NRSC.2012.6208576","DOIUrl":"https://doi.org/10.1109/NRSC.2012.6208576","url":null,"abstract":"Mammograms are X-ray images, which are used in breast cancer detection. Automatic pectoral muscle removal on Medio-Lateral Oblique-view (MLO) of mammograms is an essential step for many mammography processing algorithms. Presence of pectoral muscle gives false positive results in automated breast cancer detection. The sizes, the shapes and the intensity contrasts of pectoral muscles change greatly from one MLO view to another. So, the suppression or exclusion of the pectoral muscle from the mammograms is demanded for computer-aided analysis, and this task requires the identification of the pectoral muscle. The main objective of this study is to propose an automated method to efficiently identify the pectoral muscle in MLO mammograms. This work uses a normalized graph cuts segmentation technique for identifying the pectoral muscle edge.","PeriodicalId":109281,"journal":{"name":"2012 29th National Radio Science Conference (NRSC)","volume":"72 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123524752","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: 11
C25. Digital signal classification by compressed cyclostationary features 这件。基于压缩循环平稳特征的数字信号分类
2012 29th National Radio Science Conference (NRSC) Pub Date : 2012-04-10 DOI: 10.1109/NRSC.2012.6208543
S. El Khamy, Amr El Helw, A. Mahdy
{"title":"C25. Digital signal classification by compressed cyclostationary features","authors":"S. El Khamy, Amr El Helw, A. Mahdy","doi":"10.1109/NRSC.2012.6208543","DOIUrl":"https://doi.org/10.1109/NRSC.2012.6208543","url":null,"abstract":"Different classifiers have been adapted for classification of digital signals in low SNR environments in many researches. For efficient performance of signals classifiers and features detectors in real time, limited number of features are required. In this paper we introduce a method to compress the cyclostationary features of digital signals using Discrete Wavelet Transform (DWT). The target is to reach low percentage of classification error with reducing the number of features required. Using the proposed technique, different types of digital signals as BPSK and QPSK signals in three different cognitive radio scenarios have been considered. Simulation results show that the proposed technique can achieve classification accuracy up to 97% with a reduction percentage of 87.5% in the utilized features.","PeriodicalId":109281,"journal":{"name":"2012 29th National Radio Science Conference (NRSC)","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124774336","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: 2
C26. Selective On-Fly Scrambling Algorithm (SOFSA) for CELP coders for secured real-time voice communications C26。用于安全实时语音通信的CELP编码器的选择性飞扰算法(SOFSA)
2012 29th National Radio Science Conference (NRSC) Pub Date : 2012-04-10 DOI: 10.1109/NRSC.2012.6208544
M. Rizk, N. Sadek, M. Eskander
{"title":"C26. Selective On-Fly Scrambling Algorithm (SOFSA) for CELP coders for secured real-time voice communications","authors":"M. Rizk, N. Sadek, M. Eskander","doi":"10.1109/NRSC.2012.6208544","DOIUrl":"https://doi.org/10.1109/NRSC.2012.6208544","url":null,"abstract":"Fast secured speech transmission is certainly essential especially in real-time multimedia applications. This paper proposes an effective, low complexity, Selective On-Fly Scrambling Algorithm (SOFSA) that could be implemented on Code-Excited-Linear-Prediction (CELP) parameters while processing the speech frame in order to provide fast speech security. ITU G.723.1, which is one of the most widely used speech coders in Voice over Internet Protocol (VoIP) applications, is chosen as our test CELP coder. Subjective and objective measurements are used to prove SOFSA's utility in real-time voice applications. Results show that the implementation of SOFSA on selective CELP parameters, especially on high intelligibility density parameters, provides a form of data security without compromising neither the bandwidth of the output nor the speech quality. Thereby the proposed algorithm SOFSA could avoid the use of a separate complex data encryption algorithm with higher processing delay.","PeriodicalId":109281,"journal":{"name":"2012 29th National Radio Science Conference (NRSC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131059291","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
C3. Teletraffic performance modeling of cellular communication with heavy-tailed distributed cellular dwell time C3。具有重尾分布蜂窝停留时间的蜂窝通信的通信性能建模
2012 29th National Radio Science Conference (NRSC) Pub Date : 2012-04-10 DOI: 10.1109/NRSC.2012.6208521
Fadi H. El-Ghitani, H. El-Badawy, H. El-Hennawy
{"title":"C3. Teletraffic performance modeling of cellular communication with heavy-tailed distributed cellular dwell time","authors":"Fadi H. El-Ghitani, H. El-Badawy, H. El-Hennawy","doi":"10.1109/NRSC.2012.6208521","DOIUrl":"https://doi.org/10.1109/NRSC.2012.6208521","url":null,"abstract":"Cellular dwell time plays an important role in calculating teletraffic performance metrics such as call blocking and forced termination probabilities. However to our knowledge, cellular teletraffic performance had not been calculated under the assumption of heavy-tailed cellular dwell time distribution. In this paper, it will be shown that the heavy-tailed distribution can be fitted into k-phases hyperexponential distribution which allows us to analytically calculate various teletraffic performance metrics.","PeriodicalId":109281,"journal":{"name":"2012 29th National Radio Science Conference (NRSC)","volume":"64 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132777770","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
C45. Classification of OFDM signals using higher order statistics and clustering techniques C45。利用高阶统计和聚类技术对OFDM信号进行分类
2012 29th National Radio Science Conference (NRSC) Pub Date : 2012-04-10 DOI: 10.1109/NRSC.2012.6208563
S. El-Khamy, H. Elsayed, M. Rizk
{"title":"C45. Classification of OFDM signals using higher order statistics and clustering techniques","authors":"S. El-Khamy, H. Elsayed, M. Rizk","doi":"10.1109/NRSC.2012.6208563","DOIUrl":"https://doi.org/10.1109/NRSC.2012.6208563","url":null,"abstract":"In the context of cognitive radio or military applications, it is a crucial task to distinguish various OFDM based systems such as fixed WiMAX and Wi-Fi from each others. This paper presents a novel technique that deals with the classification of OFDM signals using higher order moments and cumulants with different types of classifiers and clustering techniques is proposed. Four classification techniques were considered, namely, Support Vector Machines, K-nearest neighbors, Maximum Likelihood and neural network (NN) classifiers. Two clustering techniques were utilized, namely, Fuzzy K-Means and Fuzzy C-means. Simulation results show that the proposed technique is able to classify different types of OFDM signals in Rayleigh fading and additive white Gaussian noise (AWGN) channels with high accuracy. It is also shown that the NN classifier outperforms the other three considered classifiers.","PeriodicalId":109281,"journal":{"name":"2012 29th National Radio Science Conference (NRSC)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125578119","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: 2
C40. Improved potential field controller for obstacle avoidance in mobile robots C40。移动机器人避障的改进势场控制器
2012 29th National Radio Science Conference (NRSC) Pub Date : 2012-04-10 DOI: 10.1109/NRSC.2012.6208558
Marwa Yousef, H. I. Ali, S. Habashy, E. Saad
{"title":"C40. Improved potential field controller for obstacle avoidance in mobile robots","authors":"Marwa Yousef, H. I. Ali, S. Habashy, E. Saad","doi":"10.1109/NRSC.2012.6208558","DOIUrl":"https://doi.org/10.1109/NRSC.2012.6208558","url":null,"abstract":"In this paper, improved potential field controller suitable for obstacle avoidance is proposed. Genetic algorithms are used to improve the potential field controller by optimizing the forces applied to the robot making the robot path much smoother. A measure of smoothness is used to guide the genetic algorithm optimizer during its search. Of course more smoothing gives less distance and more speed to reach the goal. The optimized controller is simulated on Windows Vista using Matlab Software. Many cases including environments with single obstacle up to three obstacles and multi-knee corridor are simulated. Results are compared to previous work, illustrating the superiority of the proposed work.","PeriodicalId":109281,"journal":{"name":"2012 29th National Radio Science Conference (NRSC)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122193268","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: 2
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信