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2014 21st International Conference on Telecommunications (ICT)最新文献

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4th order statistics based blind channel estimation for multicarrier transmission 基于四阶统计量的多载波盲信道估计
2014 21st International Conference on Telecommunications (ICT) Pub Date : 2014-05-04 DOI: 10.1109/ICT.2014.6845096
Rabah Maoudj, Iness Ahriz, Adrien Savarit, L. Féty, M. Terré
{"title":"4th order statistics based blind channel estimation for multicarrier transmission","authors":"Rabah Maoudj, Iness Ahriz, Adrien Savarit, L. Féty, M. Terré","doi":"10.1109/ICT.2014.6845096","DOIUrl":"https://doi.org/10.1109/ICT.2014.6845096","url":null,"abstract":"This paper presents a blind channel estimation algorithm for multicarrier systems. The proposed scheme is based on fourth order statistics estimation of received data followed by a Gauss linearization of a non-linear system. The channel estimation is performed over a very short number of symbols in order to stay compliant with the channel coherence time. The proposed approach is well suited to CP-OFDM system transmitting circular M-QAM communication symbols but, being not based on the cyclic prefix properties, it could be applied, with some adjustments, to filterbank multicarrier waveforms transmitting M-OQAM communication symbols. The blind algorithm presented provides finally an increase of the useful throughput and it gives a high flexibility for the waveform usage, avoiding the difficult time and frequency pilot location optimization problem.","PeriodicalId":154328,"journal":{"name":"2014 21st International Conference on Telecommunications (ICT)","volume":"64 15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133985236","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
Impact of VCSEL nonlinearity on Discrete MultiTone modulation: Quasi-static approach VCSEL非线性对离散多音调制的影响:准静态方法
2014 21st International Conference on Telecommunications (ICT) Pub Date : 2014-05-04 DOI: 10.1109/ICT.2014.6845091
F. Barrami, Y. Guennec, E. Novakov, P. Busson
{"title":"Impact of VCSEL nonlinearity on Discrete MultiTone modulation: Quasi-static approach","authors":"F. Barrami, Y. Guennec, E. Novakov, P. Busson","doi":"10.1109/ICT.2014.6845091","DOIUrl":"https://doi.org/10.1109/ICT.2014.6845091","url":null,"abstract":"Vertical-Cavity Surface-Emitting Lasers (VCSELs) represent many advantages for high data rate and low cost communication systems. However, they have a nonlinear transfer function, which could drastically affect the multicarrier modulations performances. The static characteristic is usually used to estimate the VCSEL nonlinearity impact on the Discrete MultiTone (DMT) modulation performances. In this paper, we demonstrate that the use of the static characteristic to model the VCSEL nonlinearity, overestimates the nonlinearity distortions when a large dynamic signal is modulating the VCSEL. In order to correctly estimate the VCSEL impact on the DMT modulation performances, we use the quasi-static characteristic to model the VCSEL nonlinearity. We show that the proposed modeling provides accurate estimations of the nonlinear distortions. The error vector magnitude (EVM) simulation results are very close to the measured EVM.","PeriodicalId":154328,"journal":{"name":"2014 21st International Conference on Telecommunications (ICT)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133179305","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
Composite transmission over large-core polymer optical fibers for in-home networkings 用于家庭网络的大芯聚合物光纤复合传输
2014 21st International Conference on Telecommunications (ICT) Pub Date : 2014-05-04 DOI: 10.1109/ICT.2014.6845090
P. Miao, Lenan Wu
{"title":"Composite transmission over large-core polymer optical fibers for in-home networkings","authors":"P. Miao, Lenan Wu","doi":"10.1109/ICT.2014.6845090","DOIUrl":"https://doi.org/10.1109/ICT.2014.6845090","url":null,"abstract":"To deliver multiple services over a single optical infrastructure, a novel composite transmission approach is proposed for an in-home access network combining multi-band (MB) discrete-Fourier-transform spread (DFT-S) discrete multitone (DMT) and M-ary position phase shift keying modulation (MPPSK). Bit-loading algorithm is introduced to maximize the total bit rate and permits a spectral coexistence between the two schemes. In addition, the optimal used bandwidth and multiband number are investigated in order to maintain strong robustness against fiber nonlinearity while achieving reduced peak-to-average power ratio (PAPR). A composite DMT and two MPPSK channels over 50 m step-index (SI) polymer optical fiber (POF) link has been successfully implemented. The results demonstrate that a total bit rate of 1.122 Gbps with a bit error rate (BER) of 1.2019×10-4 and 2.01×10-3 for DMT and MPPSK are achieved respectively, and what's more, excellent coexistence performance is obtained in the composite transmission. It is a promising technique for future in-home networkings.","PeriodicalId":154328,"journal":{"name":"2014 21st International Conference on Telecommunications (ICT)","volume":"32 Suppl 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134519927","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
A novel coordinated scheduling algorithm for uplink CoMP systems 一种新的上行CoMP系统协调调度算法
2014 21st International Conference on Telecommunications (ICT) Pub Date : 2014-05-04 DOI: 10.1109/ICT.2014.6845116
Yinxiang Zhang, Pengxiang Hu
{"title":"A novel coordinated scheduling algorithm for uplink CoMP systems","authors":"Yinxiang Zhang, Pengxiang Hu","doi":"10.1109/ICT.2014.6845116","DOIUrl":"https://doi.org/10.1109/ICT.2014.6845116","url":null,"abstract":"As a key technology adopted by LTE-A, coordinated multipoint (CoMP) transmission and reception differs from other conventional techniques in the exploitation of inter-cell interference (ICI) to improve spectral efficiency, especially at the cell-edge. While most of previous studies concentrate on downlink CoMP aspects, this paper deals with the coordinated scheduling in uplink CoMP. A scheduling metric based on nullspace projection and average throughput is created to support the proposed coordinated scheduling algorithm. The novel approach is compared with conventional coordinated scheduling strategies in terms of sum rate, fairness, and complexity. Extensive systemlevel simulation shows that the proposed scheme achieves a better tradeoff between system capacity and throughput fairness while reducing the performance-complexity significantly.","PeriodicalId":154328,"journal":{"name":"2014 21st International Conference on Telecommunications (ICT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130963537","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
Improving the capacity of future IEEE 802.11 high efficiency WLANs 提高未来IEEE 802.11高效无线局域网的容量
2014 21st International Conference on Telecommunications (ICT) Pub Date : 2014-05-04 DOI: 10.1109/ICT.2014.6845128
Imad Jamil, L. Cariou, J. Hélard
{"title":"Improving the capacity of future IEEE 802.11 high efficiency WLANs","authors":"Imad Jamil, L. Cariou, J. Hélard","doi":"10.1109/ICT.2014.6845128","DOIUrl":"https://doi.org/10.1109/ICT.2014.6845128","url":null,"abstract":"In future's high density Wireless Local Area Networks (WLANs), to improve the overall throughput, we envision the optimization of the MAC protocols and mechanisms. Traditionally, it's clear in the literature that Transmit Power Control (TPC) is chosen as one of the most powerful tools for optimizing MAC protocols. However, the TPC is not always possible to implement due to hardware and licensing limitations on one hand, and on the other, its unbalanced use results in starvation situations. In the same context, the Clear Channel Assessment (CCA) threshold adaptation is proving its effectiveness. This adaptation is preferable to TPC that behaves aggressively towards transmitters having lower transmit power. In this paper we show that CCA adaptation mechanism may be used effectively to optimize the spatial reuse in dense WLAN deployments. For a dense IEEE 802.11n network topology, our simulations show a global gain of 190% in aggregate throughput compared to the current bound assumed by the present MAC protocol.","PeriodicalId":154328,"journal":{"name":"2014 21st International Conference on Telecommunications (ICT)","volume":"183 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134152974","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: 33
M2M communications in cellular network deployments using LTE 蜂窝网络部署中使用LTE的M2M通信
2014 21st International Conference on Telecommunications (ICT) Pub Date : 2014-05-04 DOI: 10.1109/ICT.2014.7575074
R. Ratasuk, N. Mangalvedhe, Amitava Ghosh
{"title":"M2M communications in cellular network deployments using LTE","authors":"R. Ratasuk, N. Mangalvedhe, Amitava Ghosh","doi":"10.1109/ICT.2014.7575074","DOIUrl":"https://doi.org/10.1109/ICT.2014.7575074","url":null,"abstract":"With the widespread deployment of LTE 4G systems and large number of connected devices due to the Internet of Things, M2M services using LTE is under consideration by many cellular operators. In LTE Rel-12, low cost M2M devices with material cost comparable to EGPRS devices are being introduced. In addition, coverage enhancement techniques, which would be required to support M2M, will be standardized in Rel-13. In this paper, we will present an overview of M2M communication using LTE. We will cover the basics of LTE and show that LTE can be used to efficiently serve human and machine traffic. In addition, capacity results for some representative M2M services will be provided and their impact on human traffic will be discussed. Finally, M2M analysis using a real-world deployment scenario will be presented.","PeriodicalId":154328,"journal":{"name":"2014 21st International Conference on Telecommunications (ICT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133540150","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
On enhanced multimedia broadcast multicast service for 4G 4G增强型多媒体广播组播业务研究
2014 21st International Conference on Telecommunications (ICT) Pub Date : 2014-05-04 DOI: 10.1109/ICT.2014.6845105
Carlos Reis, A. Correia, N. Souto, M. Silva
{"title":"On enhanced multimedia broadcast multicast service for 4G","authors":"Carlos Reis, A. Correia, N. Souto, M. Silva","doi":"10.1109/ICT.2014.6845105","DOIUrl":"https://doi.org/10.1109/ICT.2014.6845105","url":null,"abstract":"The enhanced multimedia broadcast multicast service (eMBMS) was originally introduced in long term evolution (LTE) release 9 and has been improved in releases 10 and 11. The goal of eMBMS is to improve the coverage of high data rates and cell-edge throughput of broadcast services. In this paper we analyze this service that in spite of not being widely deployed has received increased importance due to the availability of new smart phones and tablet devices creating conditions to become eMBMS more attractive. The performance results indicate that the use of soft frequency reuse in single frequency network is essential for improving eMBMS throughput and coverage.","PeriodicalId":154328,"journal":{"name":"2014 21st International Conference on Telecommunications (ICT)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133684184","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
Optimizing the embedding of cloud network Virtual Infrastructures 优化云网络虚拟基础架构的嵌入
2014 21st International Conference on Telecommunications (ICT) Pub Date : 2014-05-04 DOI: 10.1109/ICT.2014.6845150
J. Soares, S. Sargento
{"title":"Optimizing the embedding of cloud network Virtual Infrastructures","authors":"J. Soares, S. Sargento","doi":"10.1109/ICT.2014.6845150","DOIUrl":"https://doi.org/10.1109/ICT.2014.6845150","url":null,"abstract":"Infrastructure-as-a-Service (IaaS), which is offered by cloud computing, has focused on providing computing and storage resources, considering network mostly as a required communication accessory and not as a resource itself. In other words, the ability to define network resources (e.g. routing/switching elements, bandwidth, delay) is still very limited. However, the need to have more robust solutions is becoming clearer. In this paper we argue that, in a near future, cloud infrastructure services will evolve and allow the definition of complete infrastructures, which we refer to as Virtual Infrastructures (VI), which comprise not only computing resources but also network resources. This paper specifically addresses the VI embedding problem through joint virtualization of computing and network resources. In order to address this problem, an Integer Linear Programming (ILP) formulation with two embedding strategies is proposed. Finally, the performance of the different strategies is carefully evaluated.","PeriodicalId":154328,"journal":{"name":"2014 21st International Conference on Telecommunications (ICT)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133741206","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
A downlink power control heuristic algorithm for LTE networks LTE网络下行功率控制启发式算法
2014 21st International Conference on Telecommunications (ICT) Pub Date : 2014-05-04 DOI: 10.1109/ICT.2014.6845132
Mohamad Yassin, S. Lahoud, M. Ibrahim, K. Khawam
{"title":"A downlink power control heuristic algorithm for LTE networks","authors":"Mohamad Yassin, S. Lahoud, M. Ibrahim, K. Khawam","doi":"10.1109/ICT.2014.6845132","DOIUrl":"https://doi.org/10.1109/ICT.2014.6845132","url":null,"abstract":"The recent development of mobile terminals, the proliferation of mobile applications and the increasing need for mobile data have led to a dense deployment of mobile networks. In this context, the Long Term Evolution (LTE) standard is adopted by a large number of mobile network operators. LTE uses Orthogonal Frequency Division Multiple Access (OFDMA) technique on the downlink of the radio interface along with frequency reuse-1 model. However, Inter-Cell Interference (ICI) and system power consumption will cause limitations in terms of mean user throughput and system performance. Indeed, several recent works focus on the minimization of ICI and power consumption in multi-user OFDMA networks. In this paper, we propose a distributed heuristic power control algorithm that aims at minimizing the total downlink power of an LTE system. We also study the impact of the power control algorithm on ICI and system performance. Simulation results show that the proposed algorithm largely reduces the downlink power consumption without degrading system performance. In addition, it increases the mean throughput for cell-edge users that are mainly affected by ICI problems.","PeriodicalId":154328,"journal":{"name":"2014 21st International Conference on Telecommunications (ICT)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134341923","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: 21
Equalization in hard disk drive read channels 硬盘驱动器读通道中的均衡
2014 21st International Conference on Telecommunications (ICT) Pub Date : 2014-05-04 DOI: 10.1109/ICT.2014.6845145
Nuno Miguel de Figueiredo Garrido, F. Cercas
{"title":"Equalization in hard disk drive read channels","authors":"Nuno Miguel de Figueiredo Garrido, F. Cercas","doi":"10.1109/ICT.2014.6845145","DOIUrl":"https://doi.org/10.1109/ICT.2014.6845145","url":null,"abstract":"This paper presents a comprehensive non-exhaustive comparative study of hard disk drive read-channel equalization techniques used in the readback process of magnetically stored information. The main read channel architectures: partial-response maximum likelihood (PRML) and decision feedback equalization (DFE) based systems, are compared in power consumption, layout area, data signalling rate and data density. This work focuses on the key component of the read channel, presenting a continuous-time analog solution for the pulse-slimming equalizer capable of reducing power consumption and die area by a factor of ten, whilst showing equivalent response to a FIR filter implementation.","PeriodicalId":154328,"journal":{"name":"2014 21st International Conference on Telecommunications (ICT)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123671759","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
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