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2012 19th International Conference on Telecommunications (ICT)最新文献

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Localization in large scale wireless sensor networks 大规模无线传感器网络中的定位
2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221229
H. Safa, F. Yassine
{"title":"Localization in large scale wireless sensor networks","authors":"H. Safa, F. Yassine","doi":"10.1109/ICTEL.2012.6221229","DOIUrl":"https://doi.org/10.1109/ICTEL.2012.6221229","url":null,"abstract":"Wireless Sensor Networks facilitate monitoring physical environments with improved accuracy. Localization has been a major challenge in such networks because without finding the position of the sensor that is reporting sensed data, the reported data will not be useful. In this paper, we survey some of the existing localization techniques and propose a new algorithm for large scale networks that minimizes both localization error and power consumption. We also evaluate the performance of these algorithms using the network simulator (NS-2) measuring several metrics such as energy and localization error while varying a number of simulation parameters such as the number of sensors, the area size, etc. Results show that significant enhancement is obtained with the proposed algorithm.","PeriodicalId":413534,"journal":{"name":"2012 19th International Conference on Telecommunications (ICT)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116946205","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
Dimension estimation based detector for multiple-antenna cognitive radio networks 基于维数估计的多天线认知无线电网络检测器
2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221285
B. Zayen, A. Hayar
{"title":"Dimension estimation based detector for multiple-antenna cognitive radio networks","authors":"B. Zayen, A. Hayar","doi":"10.1109/ICTEL.2012.6221285","DOIUrl":"https://doi.org/10.1109/ICTEL.2012.6221285","url":null,"abstract":"In this paper, a spectrum sensing approach for multiple-antenna cognitive radio networks will be proposed. Specifically, we will apply dimension estimation based spectrum sensing technique using minimum description length (MDL) criteria to sense the presence of primary users signals. Therefore, we consider a cognitive radio network with cognitive user equipped with M received antennas and K (M >; K) primary users and we try to estimate the number of primary users present in this network using MDL criteria. We detect then presence of primary signals for a fixed false alarm probability derived analytically using the distribution of Tracy-Widom of order two. Performance study of the proposed detector using different properties DVB-T systems will be presented. Simulation results show high performances detection even with a very small number of antennas.","PeriodicalId":413534,"journal":{"name":"2012 19th International Conference on Telecommunications (ICT)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126071008","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
On real-time video streaming over LTE networks with mobile-to-mobile cooperation 在LTE网络上的实时视频流与移动到移动的合作
2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221240
E. Yaacoub, Z. Dawy, A. Abu-Dayya
{"title":"On real-time video streaming over LTE networks with mobile-to-mobile cooperation","authors":"E. Yaacoub, Z. Dawy, A. Abu-Dayya","doi":"10.1109/ICTEL.2012.6221240","DOIUrl":"https://doi.org/10.1109/ICTEL.2012.6221240","url":null,"abstract":"Real-time video streaming over LTE networks is investigated in the presence of mobile-to-mobile collaboration. Mobiles are grouped into collaborative clusters using a low-complexity clustering algorithm. In each cluster, collaboration is implemented by having a cluster head multicast the content to other cluster members using a short-range wireless communication technology. The cluster heads receive the data on the long-range LTE links either via unicasting or multicasting. LTE scheduling is taken into account on the long range transmissions. The proposed approach is compared to the non-collaborative scenario. Results show that the proposed approach leads reduced energy consumption, enhanced video quality (reduction of loss distortion), and bandwidth savings.","PeriodicalId":413534,"journal":{"name":"2012 19th International Conference on Telecommunications (ICT)","volume":"233 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122093149","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: 16
Cognitive interference alignment between small cells and a macrocell 小细胞和大细胞之间的认知干扰
2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221210
S. Chatzinotas, B. Ottersten
{"title":"Cognitive interference alignment between small cells and a macrocell","authors":"S. Chatzinotas, B. Ottersten","doi":"10.1109/ICTEL.2012.6221210","DOIUrl":"https://doi.org/10.1109/ICTEL.2012.6221210","url":null,"abstract":"Small cells have attracted large interest lately in the research community, mainly due to easy and quick deployment. In addition, a large number of small cells is in general more energy efficient than macrocells since less power is required to combat path loss and get across the wireless medium. However, in current network configurations these two types of cells have to coexist over the same spectrum because existing cellular systems are mainly based on macrocells and additional bandwidth for small cell deployments is scarce and too expensive to acquire. In this context, this contribution investigates an underlay cognitive communication technique which exploits interference alignment across multiple antennas in order to mitigate the interference of small cell User Terminals (UTs) towards the macrocell Base Station (BS). More specifically, three techniques for aligning interference are investigated, namely static, coordinated and un-coordinated. The system performance is evaluated and compared based on sum-rate capacity, primary rate protection ratio and primary to secondary rate ratio.","PeriodicalId":413534,"journal":{"name":"2012 19th International Conference on Telecommunications (ICT)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116845078","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: 28
Optimum configuration for discrete multi-tone transmission over polymer optical fiber 聚合物光纤上离散多音传输的最佳配置
2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221284
Linning Peng, S. Haese, M. Hélard
{"title":"Optimum configuration for discrete multi-tone transmission over polymer optical fiber","authors":"Linning Peng, S. Haese, M. Hélard","doi":"10.1109/ICTEL.2012.6221284","DOIUrl":"https://doi.org/10.1109/ICTEL.2012.6221284","url":null,"abstract":"High bit rate transmission over polymer optical fiber (POF) attracts great interests recently. This paper investigates the discrete multi-tone (DMT) transmission over 50-meter step-index POF (SI-POF) based on an experimental system. The system adopts a digital storage oscilloscope (DSO) and processes the data off-line, which is the most common solution in the POF researches. We first study the problem of effective number of bits (ENOB) in the DSO's analog-to-digital converter (ADC). Then we investigate the optimum configuration of the DMT transmission in terms of subcarrier number selection, clipping and ADC quantization effect mitigation. The proposed method of selecting optimum configuration can be easily applied to any other DMT over POF systems.","PeriodicalId":413534,"journal":{"name":"2012 19th International Conference on Telecommunications (ICT)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117005578","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
Resource allocation in OFDM two-hop cooperative relaying cellular networks OFDM两跳协同中继蜂窝网络中的资源分配
2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221255
Yan Long Wang, Yongyu Chang, Dacheng Yang
{"title":"Resource allocation in OFDM two-hop cooperative relaying cellular networks","authors":"Yan Long Wang, Yongyu Chang, Dacheng Yang","doi":"10.1109/ICTEL.2012.6221255","DOIUrl":"https://doi.org/10.1109/ICTEL.2012.6221255","url":null,"abstract":"This paper studies the resource allocation problem in orthogonal frequency division multiple access (OFDMA) cooperative relaying cellular systems. Most existing work on resource allocation does not fully consider all the influential factors for such systems. In the paper, we formulate the optimization problem for resource allocation, including relay selection, subcarrier assignment, and power allocation under a total power constraints and users' quality of serves (QoS) requirements. Since the optimal solution is complex to obtain, a suboptimal solution by making continuous relaxation and solving the dual problem is proposed. Numerical results show that our proposed algorithm can achieve superior capacity performance and low otage probability due to allocating the subcarriers and the power efficiently.","PeriodicalId":413534,"journal":{"name":"2012 19th International Conference on Telecommunications (ICT)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124577015","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
Improved performance analysis based on a novel hybrid access algorithm in femtocell networks 基于新型混合接入算法的改进飞蜂窝网络性能分析
2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221223
Linyan Li, Wei Zheng, Haijun Zhang, X. Wen, Deli Liu
{"title":"Improved performance analysis based on a novel hybrid access algorithm in femtocell networks","authors":"Linyan Li, Wei Zheng, Haijun Zhang, X. Wen, Deli Liu","doi":"10.1109/ICTEL.2012.6221223","DOIUrl":"https://doi.org/10.1109/ICTEL.2012.6221223","url":null,"abstract":"As the most potential way to improve the overall performance of the next generation wireless networks, femtocell has attracted much attention from vendors. To femtocell, hybrid access mode is a comprise access mode that operates between close access mode and open access mode. With this kind of access mode, not only the pre-registered users are able to access it, un-registered users could also gain benefits as long as there is available resources. In this paper, we propose a novel access control algorithm based on hybrid access mode. Simulation results show that this algorithm can decrease the outage rate of macro users without causing too much signaling overhead.","PeriodicalId":413534,"journal":{"name":"2012 19th International Conference on Telecommunications (ICT)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129436698","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
Coding for a radio transmission system with spectrum pooling and unequal resource sharing 具有频谱池和不均等资源共享的无线电传输系统编码
2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221303
E. Biglieri, A. Lozano, N. Alrajeh
{"title":"Coding for a radio transmission system with spectrum pooling and unequal resource sharing","authors":"E. Biglieri, A. Lozano, N. Alrajeh","doi":"10.1109/ICTEL.2012.6221303","DOIUrl":"https://doi.org/10.1109/ICTEL.2012.6221303","url":null,"abstract":"We examine a radio transmission system based on spectrum pooling, whereby the spectrum is divided into subchannels, and some users are allowed privileged access to the most reliable unused subchannels. The performance of this system is evaluated by assuming that a powerful error-control code is used, and hence by computing the information outage probability. It is shown that choosing the best channel improves considerably the performance of the privileged users. In addition, the remaining (unprivileged) users are penalized only marginally.","PeriodicalId":413534,"journal":{"name":"2012 19th International Conference on Telecommunications (ICT)","volume":"97 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129739295","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
Improving the tuning of first-order autoregressive model for the estimation of amplify and forward relay channel 改进了一阶自回归模型的调谐，用于放大和前向中继信道估计
2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221314
Soukayna Ghandour-Haidar, L. Ros, J. Brossier
{"title":"Improving the tuning of first-order autoregressive model for the estimation of amplify and forward relay channel","authors":"Soukayna Ghandour-Haidar, L. Ros, J. Brossier","doi":"10.1109/ICTEL.2012.6221314","DOIUrl":"https://doi.org/10.1109/ICTEL.2012.6221314","url":null,"abstract":"This paper deals with the estimation of the Amplify-and-Forward channel. Considering two widely accepted Rayleigh links with Jakes' spectrum, a first-order autoregressive model AR(1) is used to approximate the cascade of both links. A standard estimation algorithm is the Kalman filter. In this paper, we keep the choice of the AR(1)-Kalman filter, but we show that the method usually exploited in the literature to calculate the AR(1)-model parameter presents some disappointing results. We propose other values of the AR(1)-model parameter to improve the channel estimation, based on an off-line minimization of the asymptotic mean square error MSE for a given Doppler and signal to noise ratio. The simulation results show a considerable gain in terms of MSE of the well-tuned Kalman-based channel estimator, especially for the most common scenario of slow-fading channel.","PeriodicalId":413534,"journal":{"name":"2012 19th International Conference on Telecommunications (ICT)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129890384","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
Carrier frequency offset estimation based on data-dependent superimposed training for OFDM systems 基于数据相关叠加训练的OFDM系统载波频偏估计
2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221300
Qinjuan Zhang, Muqing Wu, Qilin Guo, Tingting Zhang, Rui Zhang
{"title":"Carrier frequency offset estimation based on data-dependent superimposed training for OFDM systems","authors":"Qinjuan Zhang, Muqing Wu, Qilin Guo, Tingting Zhang, Rui Zhang","doi":"10.1109/ICTEL.2012.6221300","DOIUrl":"https://doi.org/10.1109/ICTEL.2012.6221300","url":null,"abstract":"In this paper, we propose a solution to the carrier frequency offset (CFO) estimation based on data dependent superimposed training scheme for Orthogonal Frequency Division Multiplexing (OFDM) systems. The proposed CFO estimation can improve the bandwidth efficiency compared with traditional pilot assistant scheme because it consumes no extra bandwidth for the training sequence is superimposed to the data sequence. The simulations demonstrate that the proposed estimator can approach the performance of the pilot assistant scheme very well in terms of MSE and BER with great bandwidth efficiency improvement. Overall, the proposed solution outperforms the traditional pilot assistant scheme.","PeriodicalId":413534,"journal":{"name":"2012 19th International Conference on Telecommunications (ICT)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124208326","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
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