2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)最新文献_第10页

Performance Comparison of Coded OFDM with DFT-Precoding over Nonlinear Channels 非线性信道上编码OFDM与dft预编码的性能比较

2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB) Pub Date : 2015-11-10 DOI: 10.1109/ICUWB.2015.7324496

Yusaku Yamashita, H. Ochiai

{"title":"Performance Comparison of Coded OFDM with DFT-Precoding over Nonlinear Channels","authors":"Yusaku Yamashita, H. Ochiai","doi":"10.1109/ICUWB.2015.7324496","DOIUrl":"https://doi.org/10.1109/ICUWB.2015.7324496","url":null,"abstract":"Recent wireless communications systems adopt orthogonal frequency-division multiplexing (OFDM) signaling mainly due to its robustness against fading channels with simple receiver structure. However, it results in poor power amplifier (PA) efficiency or otherwise suffers from severe nonlinear distortion since the transmit signals have high peak-to-average power ratio (PAPR). To mitigate this, DFT-precoded OFDM has been adopted in the uplink of the Long Term Evolution (LTE) standard, which virtually forms single-carrier signals and thus generates lower PAPR than the original OFDM. Nevertheless, the insertion of precoding for OFDM generally complicates the design of optimal detection and suboptimal detection is usually employed. Therefore, the DFT- precoded OFDM with suboptimal detection shows performance inferior to the original OFDM over frequency-selective fading channels when both the systems are protected by channel coding. This observation raises a question if the DFT-precoded OFDM system can outperform OFDM when nonlinearity associate with PA is also considered. In this work, we compare the performance of coded OFDM with and without DFT precoding where both PA nonlinearity and frequency selectiveness of channels are taken into account.","PeriodicalId":339208,"journal":{"name":"2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121541383","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

Accurate Stochastic Geometry Modeling and Analysis of mmWave Cellular Networks 毫米波蜂窝网络的精确随机几何建模与分析

2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB) Pub Date : 2015-10-04 DOI: 10.1109/ICUWB.2015.7324419

Wei Lu, M. Renzo

引用次数: 6

Network Coding Parallelization Based on Matrix Operations for Multicore Architectures 基于矩阵运算的多核网络编码并行化

2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB) Pub Date : 2015-10-04 DOI: 10.1109/ICUWB.2015.7324482

Simon Wunderlich, Juan A. Cabrera, F. Fitzek, M. Pedersen

{"title":"Network Coding Parallelization Based on Matrix Operations for Multicore Architectures","authors":"Simon Wunderlich, Juan A. Cabrera, F. Fitzek, M. Pedersen","doi":"10.1109/ICUWB.2015.7324482","DOIUrl":"https://doi.org/10.1109/ICUWB.2015.7324482","url":null,"abstract":"Network coding has the potential to improve the performance of current and future communication systems (including transportation and storage) and is currently even considered for communication architectures between the individual processors on same board or different boards in close proximity. Despite the fact that single core implementations show already comparable coding speeds with standard coding approaches, this paper pushes network coding to the next level by exploiting multicore architectures. The disruptive idea presented in the paper is to break with current software implementations and coding approaches and to adopt highly optimized dense matrix operations from the high performance computation field for network coding in order to increase the coding speed. The paper presents the novel coding approach for multicore architectures and shows coding speed gains on a commercial platform such as the Raspberry Pi2 with four cores in the order of up to one full magnitude. The speed increase gain is even higher than the number of cores of the Raspberry Pi2 since the newly introduced approach exploits the cache architecture way better than by-the-book matrix operations.","PeriodicalId":339208,"journal":{"name":"2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114980183","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: 6

Miniaturization of an UWB Dual-Polarized Antenna 超宽带双极化天线的小型化

2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB) Pub Date : 2015-10-04 DOI: 10.1109/ICUWB.2015.7324474

N. Lorho, Guillaume Lirzin, A. Bikiny, Sebastien Lestieux, A. Chousseaud, T. Razban

引用次数: 6

Emitters and Receivers for Impulse Radio Ultra-Wideband and Their Healthcare Applications 脉冲无线电超宽带发射器和接收器及其医疗保健应用

2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB) Pub Date : 2015-10-04 DOI: 10.1109/ICUWB.2015.7324443

R. Vauché, S. Bourdel, J. Gaubert, N. Dehaese, H. Barthélemy

引用次数: 2

Characterization of a NLOS Off-Body Channel at 2.45 GHz Using Patch Antenna Inside a Mine 矿井内贴片天线对2.45 GHz NLOS离体信道的表征

2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB) Pub Date : 2015-10-01 DOI: 10.1109/ICUWB.2015.7324423

Moulay El Azhari, M. Nedil, I. Mabrouk, L. Talbi

引用次数: 4

Performance Comparison of Spatial Modulation Detectors under Channel Impairments 信道损伤下空间调制检测器的性能比较

2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB) Pub Date : 2015-10-01 DOI: 10.1109/ICUWB.2015.7324497

E. Soujeri, Georges Kaddoum

{"title":"Performance Comparison of Spatial Modulation Detectors under Channel Impairments","authors":"E. Soujeri, Georges Kaddoum","doi":"10.1109/ICUWB.2015.7324497","DOIUrl":"https://doi.org/10.1109/ICUWB.2015.7324497","url":null,"abstract":"Spatial modulation (SM) is a multiple antenna transmission approach that uses the index of the transmitting antenna for delivering information data. The choice on the transmitting antenna depends on the incoming bit sequence and has a random nature. The receiver estimates the transmitted symbol and the active transmit antenna index and uses both estimations to retrieve the original information bits. For best reception, individual channel links between transmit and receive antenna pairs must be unique. In fact, correct reception totally depends on the uniqueness of channel coefficients. Incorrectly interpreting channel state information at the receiver causes the BER performance to degrade and the detection to fall short. In this paper, we develop a channel model that incorporates both correlated and imperfect channel state information and use this model to study the bit-error-ratio (BER) performance of most widely used SM detectors, namely the minimum mean square error, the maximum likelihood and the optimum detector in flat Rayleigh fading channels to examine the sensitivity these detectors exhibit to the presence of either channel correlation or imperfect channel state information. The capacity of SM system is studied in comparison to other multiple-input multiple-output techniques and the influence of channel impairments on the overall system capacity is observed.","PeriodicalId":339208,"journal":{"name":"2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121688102","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: 11

Opportunistic Open-Access Macro-Femto Networks with Femto Base Station Selection 带有Femto基站选择的机会开放接入宏Femto网络

2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB) Pub Date : 2015-10-01 DOI: 10.1109/ICUWB.2015.7324489

V. Asghari, A. Ghrayeb, S. Affes

{"title":"Opportunistic Open-Access Macro-Femto Networks with Femto Base Station Selection","authors":"V. Asghari, A. Ghrayeb, S. Affes","doi":"10.1109/ICUWB.2015.7324489","DOIUrl":"https://doi.org/10.1109/ICUWB.2015.7324489","url":null,"abstract":"We consider an open-access macrocell-femtocell spectrum-sharing network with multiple femto base stations (FBSs) that are available to opportunistically handle the nearby macro users (MUs) traffic in order to manage the amount of co-channel interference to/from macro and femto systems. In fact, we believe that the co-channel interference can be managed by allowing strong macro interferers to communicate with nearby femtos. In this context, while multiple femtos are available in the area, one important question is: Which femto must be selected to serve the strong MU in order to more efficiently control the co-channel interference? In this regard, we assume that the MU of interest is located near a given number of femtos. Making use of this availability, we investigate a framework for establishing communication between the macro base station (MBS) and the MU of interest via the femto network while considering an appropriate constraint on the interference received at the neighboring MU. Then, we propose utilizing two major selection schemes, namely, emph{partial} and emph{reactive} selections, to find the appropriate FBS that can better match the femto capacity limitations. We also investigate the average bit error probability of the proposed system for both mentioned selection strategies. Finally, illustrative numerical results are shown and the benefits of using cooperative transmission with different selection strategies are discussed.","PeriodicalId":339208,"journal":{"name":"2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127523389","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

Integrated UWB Transmitter and Antenna Design for Interfacing High-Density Brain Microprobes 高密度脑微探针接口的集成超宽带发射机和天线设计

2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB) Pub Date : 2015-10-01 DOI: 10.1109/ICUWB.2015.7324465

H. Bahrami, S. Mirbozorgi, L. Rusch, B. Gosselin

引用次数: 10

Reduced Complexity Iterative Beamforming for a Set of Virtual MIMO Devices 一组虚拟MIMO设备的低复杂度迭代波束形成

2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB) Pub Date : 2015-10-01 DOI: 10.1109/ICUWB.2015.7324505

S. H. Seyedmehdi, G. Boudreau

引用次数: 0