16th International Conference on Advanced Communication Technology最新文献_第8页

A low-complexity PS based radix IFFT method for PAPR reduction in OFDM systems OFDM系统中基于低复杂度PS的基数IFFT方法

16th International Conference on Advanced Communication Technology Pub Date : 2014-03-27 DOI: 10.1109/ICACT.2014.6778963

Arttapol Reangsuntea, Pornpawit Boonsrimuang, P. Reangsuntea, P. Boonsrimuang, Hideo Kobayashi

{"title":"A low-complexity PS based radix IFFT method for PAPR reduction in OFDM systems","authors":"Arttapol Reangsuntea, Pornpawit Boonsrimuang, P. Reangsuntea, P. Boonsrimuang, Hideo Kobayashi","doi":"10.1109/ICACT.2014.6778963","DOIUrl":"https://doi.org/10.1109/ICACT.2014.6778963","url":null,"abstract":"We have proposed one of the distortion-less PAPR reduction methods which employs the Permutation Sequence (PS) in the frequency domain with embedded side information. However, the proposed PS method has high computation complexity. To improve the computation complexity for the previous proposed PS method, this paper proposes a low-complexity PS method which can keep the better peak-to-average power ratio (PAPR). In the proposed PS method, the signals at the middle stages of an N-point radix IFFT using decimation in frequency (DIF) is considered for PS processing. This paper shows that the proposed method has a lower multiplicative complexity than conventional PS method with keeping the PAPR reduction performance. The proposed method is called PS based radix IFFT, where DIF-IFFT is assigned through different stages of the IFFT transform. This proposed method can reduce the multiplicative complexity relatively with keeping the similar PAPR reduction to other methods such as C-PTS and C-PS. The proposed method also can reduce the side information as compared with the C-PTS. This paper presents the various computer simulation results to verify the effectiveness of proposed method.","PeriodicalId":6380,"journal":{"name":"16th International Conference on Advanced Communication Technology","volume":"2004 1","pages":"273-278"},"PeriodicalIF":0.0,"publicationDate":"2014-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90324476","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

Design of disaster alerting functionality for digital signage service 数字标牌服务的灾难报警功能设计

16th International Conference on Advanced Communication Technology Pub Date : 2014-03-27 DOI: 10.1109/ICACT.2014.6779035

Miyoung Huh, Wook Hyun, Sung Hei Kim, Shin-Gak Kang

引用次数: 4

A Cloud-Based Cross Language Search engine for Quranic application 基于云的古兰经跨语言搜索引擎

16th International Conference on Advanced Communication Technology Pub Date : 2014-03-27 DOI: 10.1109/ICACT.2014.6778952

Z. Adhoni, H. Al Hamad, A. A. Siddiqi, Zaheer Ahmed Adhonid

引用次数: 6

Reconstruction of data type in obfuscated binary programs 混淆二进制程序中数据类型的重建

16th International Conference on Advanced Communication Technology Pub Date : 2014-03-27 DOI: 10.1109/ICACT.2014.6778988

W. Ding, ZhiMin Gu, Feng Gao

引用次数: 1

Fast channel estimation techniques for LTE downlink systems based on fast linear Toeplitz system solver 基于快速线性Toeplitz系统解算器的LTE下行系统快速信道估计技术

16th International Conference on Advanced Communication Technology Pub Date : 2014-03-27 DOI: 10.1109/ICACT.2014.6779023

Abdelhakim Khlifi, R. Bouallègue

引用次数: 2

Performances analysis of Algebraic Space Time Code under correlated and uncorrelated channels 相关信道和不相关信道下代数空时码的性能分析

16th International Conference on Advanced Communication Technology Pub Date : 2014-03-27 DOI: 10.1109/ICACT.2014.6779181

Inès Ben Hassine, R. Bouallègue

引用次数: 2

SIP-based vertical handover scheme with bicasting 基于sip的双向广播垂直切换方案

16th International Conference on Advanced Communication Technology Pub Date : 2014-03-27 DOI: 10.1109/ICACT.2014.6778914

T. Hemmati, M. H. Y. Moghadam

{"title":"SIP-based vertical handover scheme with bicasting","authors":"T. Hemmati, M. H. Y. Moghadam","doi":"10.1109/ICACT.2014.6778914","DOIUrl":"https://doi.org/10.1109/ICACT.2014.6778914","url":null,"abstract":"Due the complexity of the wireless environments, single technology cannot be efficient to provide demands of mobile users. Hence, in cooperation with heterogeneous wireless technologies, the next generation of wireless systems makes it possible to communicate everywhere. Providing high performance and data rate is what this cooperation has promised to meet. So issues related to the heterogeneity of wireless environment like handover should be addressed. With the appearance of overlapping wireless networks, MNs have to switch their connections between different access technologies having different capabilities and characteristics. In this case, the handover process is more complex and is known as Vertical Handover. In this paper, we focus on the vertical handover management and use an extension of SIP to support vertical handover with bicasting. Delay reduction and SIP signaling messages overhead reduction are the challenges we have tried to improve with our proposed method. To evaluate our proposed method, we use the OPNET Modeler 14.5 and it's Performance for real-time service besides examining the VoIP. Simulation has been performed on UMTS/WLAN networks. The results show that our technique can improve latency and throughput.","PeriodicalId":6380,"journal":{"name":"16th International Conference on Advanced Communication Technology","volume":"52 1","pages":"19-22"},"PeriodicalIF":0.0,"publicationDate":"2014-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79155757","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

Automatic WBAN area recognition using P2P signal strength in office environment 在办公环境下利用P2P信号强度自动识别WBAN区域

16th International Conference on Advanced Communication Technology Pub Date : 2014-03-27 DOI: 10.1109/ICACT.2014.6778965

Joonyoung Jung, Dong-oh Kang, C. Bae

{"title":"Automatic WBAN area recognition using P2P signal strength in office environment","authors":"Joonyoung Jung, Dong-oh Kang, C. Bae","doi":"10.1109/ICACT.2014.6778965","DOIUrl":"https://doi.org/10.1109/ICACT.2014.6778965","url":null,"abstract":"The distance estimation between mobile devices is a fundamental issue for a lot of applications of indoor wireless body area network (WBAN). The RSSI have been used to estimate the distance based on the received signal strength from another mobile device. Theoretically, the signal strength is inversely proportional to squared distance, and there is a known radio propagation model that is used to convert the signal strength into distance. However, in real environments, it is hard to measure distance using RSSI because of noises, obstacles, and the type of antenna. Distance estimation using RSSI in real-world applications is still questionable because of inaccuracy. However, RSSI could become the most used technology of distance estimation from the cost/precision viewpoint because of low cost. Mobile devices need to recognize each other in office environment automatically. However, distance estimation using the RSSI of Bluetooth is difficult because of large deviation of RSSI value. This paper provides the experimental results of RSSI measurement between mobile devices in office environment. And it applies the Low Pass Filter (LPF) to reduce the deviation of RSSI value. This paper shows that the distance estimation to recognize WBAN area is possible clearly when Bluetooth RSSI LPF data are used.","PeriodicalId":6380,"journal":{"name":"16th International Conference on Advanced Communication Technology","volume":"41 1","pages":"282-285"},"PeriodicalIF":0.0,"publicationDate":"2014-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78376456","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 confident email system based on a new correspondence model 基于新通信模型的自信电子邮件系统

16th International Conference on Advanced Communication Technology Pub Date : 2014-03-27 DOI: 10.1109/ICACT.2014.6779010

Laurent Cailleux, A. Bouabdallah, J. Bonnin

{"title":"A confident email system based on a new correspondence model","authors":"Laurent Cailleux, A. Bouabdallah, J. Bonnin","doi":"10.1109/ICACT.2014.6779010","DOIUrl":"https://doi.org/10.1109/ICACT.2014.6779010","url":null,"abstract":"Despite all the current controversies, the success of the email service is still valid. The ease of use of its various features contributed to its widespread adoption. In general, the email system provides for all its users the same set of features controlled by a single monolithic policy. Such solutions are efficient but limited because they grant no place for the concept of usage which denotes a user's intention of communication: private, professional, administrative, official, military. The ability to efficiently send emails from mobile devices creates new interesting opportunities. We argue that the context (location, time, device, operating system, access network...) of the email sender appears as a new dimension we have to take into account to complete the picture. Context is clearly orthogonal to usage because a same usage may require different features depending of the context. It is clear that there is no global policy meeting requirements of all possible usages and contexts. To address this problem, we propose to define a correspondence model which for a given usage and context allows to derive a correspondence type encapsulating the exact set of required features. With this model, it becomes possible to define an advanced email system which may cope with multiple policies instead of a single monolithic one. By allowing a user to select the exact policy coping with her needs, we argue that our approach reduces the risk-taking allowing the email system to slide from a trusted one to a confident one.","PeriodicalId":6380,"journal":{"name":"16th International Conference on Advanced Communication Technology","volume":"74 1","pages":"489-492"},"PeriodicalIF":0.0,"publicationDate":"2014-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78145755","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

Gain and bandwidth improvements for distributed Raman amplifier in UW-WDM communication systems UW-WDM通信系统中分布式拉曼放大器增益和带宽的改进

16th International Conference on Advanced Communication Technology Pub Date : 2014-03-27 DOI: 10.1109/ICACT.2014.6779190

F. Mustafa, A. Khalaf, F. A. Elgeldawy

{"title":"Gain and bandwidth improvements for distributed Raman amplifier in UW-WDM communication systems","authors":"F. Mustafa, A. Khalaf, F. A. Elgeldawy","doi":"10.1109/ICACT.2014.6779190","DOIUrl":"https://doi.org/10.1109/ICACT.2014.6779190","url":null,"abstract":"Fiber Raman amplifiers in ultra wideband wavelength division multiplexing (UW-WDM) systems have recently received much more attention because of their greatly extended bandwidth and distributed amplification with the installed fiber as gain medium. It has been shown that the bandwidth of the amplifier can be further increased and gain spectrum can be tailored by using pumping with multiple wavelengths. In this paper, the distributed multi-pumping Raman amplifier has been studied and analyzed by testing two designed model of amplifier to obtain the gain of maximum flatness and bandwidth. Also we have investigated the effects of many parameters on the gain and bandwidth of Raman amplifier such as: pumping wavelength, offset wavelength, the relative refractive index difference and the number and location of the cascaded units used in the amplifier model design. The models is analyzed where six and eight Raman pumping of special pumping power and pumping wavelengths are lunched in the forward direction where each model is analyzed by two different way. The gain is computed over the spectral optical wavelengths (1.45μm ≤ λ signal ≤ 1.65μm). The differential gain of each unit of the amplifier is obtained according to the straight line-exponential model of a small maximum constant gain of 7.4×10-14 m/W over an optical wavelength interval of 16 nm.","PeriodicalId":6380,"journal":{"name":"16th International Conference on Advanced Communication Technology","volume":"88 1","pages":"329-336"},"PeriodicalIF":0.0,"publicationDate":"2014-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78367399","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