2015 1st International Conference on Telematics and Future Generation Networks (TAFGEN)最新文献_第2页

Access control and user authentication concerns in cloud computing environments 云计算环境中的访问控制和用户身份验证问题

2015 1st International Conference on Telematics and Future Generation Networks (TAFGEN) Pub Date : 2015-05-26 DOI: 10.1109/TAFGEN.2015.7289572

M. Ahmadi, M. Chizari, M. Eslami, M. Golkar, Mostafa Vali

引用次数: 7

A steerable 28 GHz array antenna using branch line coupler 一种采用分支线耦合器的可操纵28ghz阵列天线

2015 1st International Conference on Telematics and Future Generation Networks (TAFGEN) Pub Date : 2015-05-26 DOI: 10.1109/TAFGEN.2015.7289579

S. I. Orakwue, R. Ngah, T. A. Rahman, H. M. Al-Khafaji

引用次数: 11

Investigation on the signal performances of pre-, post- and inline compensation of l-band dispersion compensator using Chirped Fiber Bragg grating 啁啾光纤光栅l波段色散补偿器的前补偿、后补偿和在线补偿信号性能研究

2015 1st International Conference on Telematics and Future Generation Networks (TAFGEN) Pub Date : 2015-05-26 DOI: 10.1109/TAFGEN.2015.7289587

N. Md. Yusoff, N. M. Sharif, A. H. Sulaiman, M. A. Mahdi

引用次数: 0

Performance of Adaptive Modulation in alpha-mu fading channel under selection combining diversity 选择组合分集条件下-mu衰落信道的自适应调制性能

2015 1st International Conference on Telematics and Future Generation Networks (TAFGEN) Pub Date : 2015-05-26 DOI: 10.1109/TAFGEN.2015.7289588

A. Andrawes, R. Nordin

{"title":"Performance of Adaptive Modulation in alpha-mu fading channel under selection combining diversity","authors":"A. Andrawes, R. Nordin","doi":"10.1109/TAFGEN.2015.7289588","DOIUrl":"https://doi.org/10.1109/TAFGEN.2015.7289588","url":null,"abstract":"Adaptive Modulation and Diversity technique have been providing high efficiency and quality of service for different applications in wireless communications. Both methods aim to enhance the channel capacity compared to fixed transmission method. Alpha-Mu fading channel covers different fading channels in wireless communications to study the bit error rate or spectral efficiency. In this paper, the use of adaptive transmission with SC diversity is implemented under alpha-mu fading channel. Two different options were presented. The first option deals with the transmission of the data without taking target bit error rate into account, where no transmission under this option, which is good for low data rate services. Buffering the data in bad channel condition and waiting for the next period to send the data is the main target of the second option. The target bit error rate will be considered. In each scenario, bit error rate and spectral efficiency are computed. Simulation results illustrated that the performance of α - μ fading channel can be presented to different fading models. The results show that Nakagami-m fading distribution outperforms the performance of both Rayleigh and Weibull distributions in terms of BER and SE under selection combining diversity.","PeriodicalId":319529,"journal":{"name":"2015 1st International Conference on Telematics and Future Generation Networks (TAFGEN)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125123526","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

Optimality of the HDC rules in cooperative spectrum sensing for Cognitive Radio network 认知无线电网络协同频谱感知中HDC规则的最优性

2015 1st International Conference on Telematics and Future Generation Networks (TAFGEN) Pub Date : 2015-05-26 DOI: 10.1109/TAFGEN.2015.7289569

W. Saad, M. Ismail, R. Nordin, Ayman A. El-Saleh

{"title":"Optimality of the HDC rules in cooperative spectrum sensing for Cognitive Radio network","authors":"W. Saad, M. Ismail, R. Nordin, Ayman A. El-Saleh","doi":"10.1109/TAFGEN.2015.7289569","DOIUrl":"https://doi.org/10.1109/TAFGEN.2015.7289569","url":null,"abstract":"Cognitive Radio (CR) sensing has been widely considered as a spectrum scanning mechanism that allows secondary users (SUs) or cognitive radio users to use detected spectrum holes caused by primary user (PU) absence. Hard decision combining (HDC) schemes are proposed to combine the sensing decisions of the collaborated users to come out with a global binary decision on the presence or absence PUs. This paper presents an analytical study on the optimality of HDC rules at which the Bayes risk function is minimized. In this work, the sensing performance of energy detection (ED) is also evaluated in two cases; when the estimated noise power is perfectly known at the SU receiver and when noise uncertainty is present at the SU receiver. The sensing performance of the ED and likelihood ratio test (LRT) of local spectrum sensing (SS) is first compared. Then, the performance of cooperative spectrum sensing (CSS) employing k-out-of-N combining rule has been analyzed. A mathematical derivation of an optimal decision combining rule under low Bayes risk has been formulated. Computer results show that the sensing performance of the ED method slightly outperforms the LRT method within the lower range of probability of false alarm. However, the two methods exhibit almost similar sensing performance within the higher range of probability of false alarm. On the other hand, at lower values of probability of detection, the OR combining rule exhibits the best detection performance over the Majority and AND rules. Finally, it has been found that the optimal decision combining rule to achieve lower Bayes risk function is the Majority distributed decision rule.","PeriodicalId":319529,"journal":{"name":"2015 1st International Conference on Telematics and Future Generation Networks (TAFGEN)","volume":"59 11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127580483","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

Joint clipping and amplifying techniques for PAPR reduction in OFDM systems 降低OFDM系统中PAPR的联合裁剪和放大技术

2015 1st International Conference on Telematics and Future Generation Networks (TAFGEN) Pub Date : 2015-05-26 DOI: 10.1109/TAFGEN.2015.7289575

Ali Y. Jaber, L. Latiff, N. Ahmad, A. Abdalla

{"title":"Joint clipping and amplifying techniques for PAPR reduction in OFDM systems","authors":"Ali Y. Jaber, L. Latiff, N. Ahmad, A. Abdalla","doi":"10.1109/TAFGEN.2015.7289575","DOIUrl":"https://doi.org/10.1109/TAFGEN.2015.7289575","url":null,"abstract":"Multicarrier system such as orthogonal frequency division multiplexing (OFDM) are significantly affected by peak-to-average-power ratio (PAPR). Many researchers introduce different techniques to reduce PAPR with tradeoffs of data rate loss and computations of approach. In some cases, the techniques of reduction may lead to increase average power of transmitted signal and degrades the BER performance at the receiver. Hence, proper design of PAPR reduction technique needs to be considered. In this paper, a combination of Clipping Peak and Amplifying Bottom (CPAB) is proposed. The peak of signal is clipped at a threshold A, while the bottom values of signal are amplified to threshold B. The clipping technique was widely accepted method to improve the PAPR statistics. Therefore, joint clipping with amplifying in CPAB will develop PAPR reduction. In addition, PAPR value depends on clipping and amplifying thresholds. The result shows that the clipping factor affected the complementary cumulative distribution function (CCDF) performance more than the amplifying factor in CPAB technique. Thus, by properly select the threshold of A and B, better OFDM system performance is achieved with lower PAPR.","PeriodicalId":319529,"journal":{"name":"2015 1st International Conference on Telematics and Future Generation Networks (TAFGEN)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126857227","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

The algorithm to improve the accuracy of location data of the vehicle in the cloud 该算法提高了云计算中车辆位置数据的准确性

2015 1st International Conference on Telematics and Future Generation Networks (TAFGEN) Pub Date : 2015-05-26 DOI: 10.1109/TAFGEN.2015.7289573

S. Popov, V. Glazunov, M. Kurochkin, M. Chuvatov

引用次数: 1

Indoor path loss model for 4G wireless network at 2.6 GHz 2.6 GHz 4G无线网络的室内路径损耗模型

2015 1st International Conference on Telematics and Future Generation Networks (TAFGEN) Pub Date : 2015-05-26 DOI: 10.1109/TAFGEN.2015.7289589

N. Zulkefly, T. A. Rahman, A. Al-Samman, A. Mataria, C. Leow

引用次数: 4

Multiwavelength SOA fiber ring laser based on bidirectional Lyot filter 基于双向Lyot滤波器的多波长SOA光纤环形激光器

2015 1st International Conference on Telematics and Future Generation Networks (TAFGEN) Pub Date : 2015-05-26 DOI: 10.1109/TAFGEN.2015.7289584

A. Sulaiman, M. A. Bakar, S. Hitam, M. Mahdi, N. M. Yusoff

引用次数: 7

Spectrum sharing using particle swarm optimization 基于粒子群优化的频谱共享

2015 1st International Conference on Telematics and Future Generation Networks (TAFGEN) Pub Date : 2015-05-26 DOI: 10.1109/TAFGEN.2015.7289567

Tareq M. Shami, Ayman A. El-Saleh, M. Y. Alias

引用次数: 0