发布求助
文献互助 智能选刊 最新文献

2011 IEEE GCC Conference and Exhibition (GCC)最新文献

筛选
英文 中文
On the effect of amplifier non-linearity on the capacity of MIMO systems 放大器非线性对MIMO系统容量的影响
2011 IEEE GCC Conference and Exhibition (GCC) Pub Date : 2011-04-19 DOI: 10.1109/IEEEGCC.2011.5752470
I. Ahmad, A. I. Sulyman, A. Alsanie, A. Alasmari
{"title":"On the effect of amplifier non-linearity on the capacity of MIMO systems","authors":"I. Ahmad, A. I. Sulyman, A. Alsanie, A. Alasmari","doi":"10.1109/IEEEGCC.2011.5752470","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2011.5752470","url":null,"abstract":"This paper investigates the effect of nonlinearity on the capacity of MIMO systems and develops a capacity-enhancing MIMO transmission technique suitable for deployments over nonlinear channels. Nonlinearity arises in communication systems in several ways. In this work, we focus on the nonlinearity introduced at the transmitter side by the High Power Amplifier (HPA), the last stage in the communication chain at the transmitter. Water-filling and Eigen beamforming solutions, which are well-known capacity-enhancing techniques in linear MIMO channel are re-examined for the case of nonlinear channels. We show that these algorithms degrade significantly when used over MIMO channels exhibiting nonlinearities, except when the amplifier nonlinear distortions effects are factored into the algorithms. Factoring the HPA effects into the algorithms, the capacity of the resulting nonlinear channel approaches the linear channel case.","PeriodicalId":119104,"journal":{"name":"2011 IEEE GCC Conference and Exhibition (GCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133014416","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: 18
Multicarrier-assisted PU-PIC detector for overloaded CDMA system 用于过载CDMA系统的多载波辅助PU-PIC检测器
2011 IEEE GCC Conference and Exhibition (GCC) Pub Date : 2011-04-19 DOI: 10.1109/IEEEGCC.2011.5752538
M. Choudhry, M. Zubair, I. Qureshi
{"title":"Multicarrier-assisted PU-PIC detector for overloaded CDMA system","authors":"M. Choudhry, M. Zubair, I. Qureshi","doi":"10.1109/IEEEGCC.2011.5752538","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2011.5752538","url":null,"abstract":"Multiple access interference is the major limiting factor for the channel capacity especially when it is desired to have an overloaded code division multiple access system, in which the number of users is larger than the dimension of signal space. To resolve the problem of overloading we exploit the multicarrier communication and a proposed scheme, which uses pseudo-user along with parallel interference cancellation detector. The proposed scheme assumes that spreading code for all the users is the same throughout. Multiple access interference is removed with very little computations and performance in bit error rate is almost user independent.","PeriodicalId":119104,"journal":{"name":"2011 IEEE GCC Conference and Exhibition (GCC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133107049","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
Performance analysis of PWM strategies for cascaded H-bridge three-level inverter 级联h桥三电平逆变器PWM策略的性能分析
2011 IEEE GCC Conference and Exhibition (GCC) Pub Date : 2011-04-19 DOI: 10.1109/IEEEGCC.2011.5752629
S. B. Veeranna, A. R. Beig, U. Yaragatti
{"title":"Performance analysis of PWM strategies for cascaded H-bridge three-level inverter","authors":"S. B. Veeranna, A. R. Beig, U. Yaragatti","doi":"10.1109/IEEEGCC.2011.5752629","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2011.5752629","url":null,"abstract":"Multilevel inverters with various pulse width modulation strategies have established their importance in high power high performance industrial applications, as they can synthesize output waveform with improved harmonic spectrum. This paper presents the performance analysis and comparison of different PWM strategies for cascaded H-bridge three-level inverter in terms of line voltage and motor current THD with their fundamental components. It is shown that harmonic loss minimized optimal-SHEPWM strategy gives better results in terms of voltage THD compared to SPWM, SVPWM and SHEPWM strategies.","PeriodicalId":119104,"journal":{"name":"2011 IEEE GCC Conference and Exhibition (GCC)","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132705471","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
Evolutionary multiobjective optimization for medical classification 医学分类的进化多目标优化
2011 IEEE GCC Conference and Exhibition (GCC) Pub Date : 2011-04-19 DOI: 10.1109/IEEEGCC.2011.5752566
A. Hamdi-Cherif, Chafia Kara-Mohammed
{"title":"Evolutionary multiobjective optimization for medical classification","authors":"A. Hamdi-Cherif, Chafia Kara-Mohammed","doi":"10.1109/IEEEGCC.2011.5752566","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2011.5752566","url":null,"abstract":"We propose a computational environment based on evolutionary algorithm for medical classification. We use evolutionary multiobjective optimization (EMO) to solve a general medical minimization problem. As an example, we simultaneously minimize three objectives, namely the number of genes responsible for cancer classification while reducing the number of misclassifications in both testing and learning data sets for real patients. Results quality is reported against three genetic operators namely selection, crossover and mutation, each of which offering three different methods. Our implementation gives comparable results to more sophisticated methods, such as NGSAII-like ones, with far less computational efforts.","PeriodicalId":119104,"journal":{"name":"2011 IEEE GCC Conference and Exhibition (GCC)","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128637603","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
A cross-layer based multipath routing protocol for IEEE 802.11E WLAN 用于IEEE 802.11E WLAN的基于跨层的多路径路由协议
2011 IEEE GCC Conference and Exhibition (GCC) Pub Date : 2011-04-19 DOI: 10.1109/IEEEGCC.2011.5752600
S. M. Saheb, A. Bhattacharjee, A. Vallavaraj, R. Kar
{"title":"A cross-layer based multipath routing protocol for IEEE 802.11E WLAN","authors":"S. M. Saheb, A. Bhattacharjee, A. Vallavaraj, R. Kar","doi":"10.1109/IEEEGCC.2011.5752600","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2011.5752600","url":null,"abstract":"In spite of many enhancement mechanisms are introduced to achieve QoS support in IEEE 802.11e WLAN based on Hybrid Coordination Function Controlled Channel Access (HCCA), performance evaluation results in multi-hop networks show that HCCA still suffers from significant throughput degradation and high delay at high load conditions. In this context, the route quality plays a vital role in the success of application delivery and QoS support. This paper proposes a design of a cross-layer based multipath routing protocol for IEEE 802.11e WLAN. In this proposed approach, initially multiple disjoint paths are determined. Then a total cost metric is estimated based on the Traffic Contention Time, Average Transmission Delay and Signal Fading Value. From the multiple disjoint paths, the path with minimum total cost is selected as best path and the data is transmitted through this path. The simulation results show that the proposed protocol achieves better delivery ratio and throughput with reduced delay.","PeriodicalId":119104,"journal":{"name":"2011 IEEE GCC Conference and Exhibition (GCC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129382914","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
Dynamic Generated Material for E-Learners (DGML) 电子学习者动态生成材料(DGML)
2011 IEEE GCC Conference and Exhibition (GCC) Pub Date : 2011-04-19 DOI: 10.1109/IEEEGCC.2011.5752498
A. Bentiba, M. Zemerly, O. A. Hammadi, S. Sharif, M. Naqbi
{"title":"Dynamic Generated Material for E-Learners (DGML)","authors":"A. Bentiba, M. Zemerly, O. A. Hammadi, S. Sharif, M. Naqbi","doi":"10.1109/IEEEGCC.2011.5752498","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2011.5752498","url":null,"abstract":"E-learning websites with online assessments for learners are very abundant. However, few of these websites provide learners with materials that assist them to strengthen their weak areas. Our Dynamic Generated Material for E-Learners (DGML) system, is a dynamic e-learning system that measures the learner's knowledge in a subject and generates from a database some learning materials from the sections where the learner scores low in quizzes. As a real application, we implemented DGML for DC course in electricity. DGML is a web based system. It was tested successfully whether hosted on Linux or on Microsoft Windows. Also the system was tested successfully using major web browsers and on two mobile platforms, the Nokia N97 and the iPhone.","PeriodicalId":119104,"journal":{"name":"2011 IEEE GCC Conference and Exhibition (GCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121902818","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
Multi-junction solar cell designs 多结太阳能电池设计
2011 IEEE GCC Conference and Exhibition (GCC) Pub Date : 2011-04-19 DOI: 10.1109/IEEEGCC.2011.5752551
M. Emziane, A. Sleiman
{"title":"Multi-junction solar cell designs","authors":"M. Emziane, A. Sleiman","doi":"10.1109/IEEEGCC.2011.5752551","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2011.5752551","url":null,"abstract":"In this paper the designs of multi-junction solar cells for very high energy conversion efficiencies are reviewed. We highlight the importance of the concept of multi-junction solar devices and its superiority compared to other photovoltaic technologies. We present different types of multi-junction structures, and address the different electrical configurations used in various multi-junction designs.","PeriodicalId":119104,"journal":{"name":"2011 IEEE GCC Conference and Exhibition (GCC)","volume":"6 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125924175","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
Two methods for autoregressive estimationin noise 噪声条件下的两种自回归估计方法
2011 IEEE GCC Conference and Exhibition (GCC) Pub Date : 2011-04-19 DOI: 10.1109/IEEEGCC.2011.5752587
L. Weruaga
{"title":"Two methods for autoregressive estimationin noise","authors":"L. Weruaga","doi":"10.1109/IEEEGCC.2011.5752587","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2011.5752587","url":null,"abstract":"The maximum-likelihood(ML) and the expectation-maximization criteria have been previously used in the problem of autoregressive estimation in noise. This paper presents a thorough comparative study of these techniques. Despite these criteria lead in both cases to apparently similar algorithms, the methodological differences and connections between both approaches are explored. Their performance, speed of convergence, and robustness of the solution are assessed with the help of simulated experiments. Further research work at increasing robustness in the ML approach is finally proposed.","PeriodicalId":119104,"journal":{"name":"2011 IEEE GCC Conference and Exhibition (GCC)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123707407","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
Undecryptable symmetric encryption 不可解密的对称加密
2011 IEEE GCC Conference and Exhibition (GCC) Pub Date : 2011-04-19 DOI: 10.1109/IEEEGCC.2011.5752504
T. Martin
{"title":"Undecryptable symmetric encryption","authors":"T. Martin","doi":"10.1109/IEEEGCC.2011.5752504","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2011.5752504","url":null,"abstract":"Cryptography is necessary where the confidentiality of information needs to be protected, but it often not sufficient. There are many cases where a persistent attacker can obtain the secret keys in use on a system, no matter how much the system tries to prevent this (e.g. cold-boot attacks, DRM circumvention). On the other hand, there are many systems where information needs to be stored and protected, but not understood by (i.e. available to) the recording device. This includes sensors, video recorders, CCTV, networking equipment, etc. By the nature of symmetric encryption, they have more access than they need. Asymmetric encryption could be used to prevent this, but is impractical for large volumes of data. We present a solution that allows a device to symmetrically encrypt data without itself being able to decrypt it, and nor can any attacker that compromises the device.","PeriodicalId":119104,"journal":{"name":"2011 IEEE GCC Conference and Exhibition (GCC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125312582","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
Lung cancer detection by using artificial neural network and fuzzy clustering methods 肺癌检测采用人工神经网络和模糊聚类方法
2011 IEEE GCC Conference and Exhibition (GCC) Pub Date : 2011-04-19 DOI: 10.1109/IEEEGCC.2011.5752535
F. Taher, R. Sammouda
{"title":"Lung cancer detection by using artificial neural network and fuzzy clustering methods","authors":"F. Taher, R. Sammouda","doi":"10.1109/IEEEGCC.2011.5752535","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2011.5752535","url":null,"abstract":"The early detection of the lung cancer is a challenging problem, due to the structure of the cancer cells. This paper presents two segmentation methods, Hopfield Neural Network (HNN) and a Fuzzy C-Mean (FCM) clustering algorithm, for segmenting sputum color images to detect the lung cancer in its early stages. The manual analysis of the sputum samples is time consuming, inaccurate and requires intensive trained person to avoid diagnostic errors. The segmentation results will be used as a base for a Computer Aided Diagnosis (CAD) system for early detection of lung cancer which will improves the chances of survival for the patient. The two methods are designed to classify the image of N pixels among M classes. In this study, we used 1000 sputum color images to test both methods, and HNN has shown a better classification result than FCM, the HNN succeeded in extracting the nuclei and cytoplasm regions.","PeriodicalId":119104,"journal":{"name":"2011 IEEE GCC Conference and Exhibition (GCC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114544380","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: 117
首页 上一页 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：604180095
Book学术官方微信