2012 19th International Conference on Telecommunications (ICT)最新文献_第10页

Experimental performance of mobile DVB-T2 in SFN and distributed MISO network 移动DVB-T2在SFN和分布式MISO网络中的实验性能

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221324

M. Tormos, C. Tanougast, A. Dandache, P. Bretillon, P. Kasser

{"title":"Experimental performance of mobile DVB-T2 in SFN and distributed MISO network","authors":"M. Tormos, C. Tanougast, A. Dandache, P. Bretillon, P. Kasser","doi":"10.1109/ICTEL.2012.6221324","DOIUrl":"https://doi.org/10.1109/ICTEL.2012.6221324","url":null,"abstract":"Digital Video Broadcasting-Handheld (DVB-H) and Terrestrial Digital Multimedia Broadcasting (T-DMB) are the most known standards that enable digital television transmissions to handheld or mobile receivers in Europe. The emerging DVB-T2 standard enables a network based on frequency diversity coding (called Alamouti Space-Frequency coding) suitable for multipath propagation environments which presents better performances for fixed reception compared to SFN (Single Frequency Network). In this paper, we present detailed experimental performance results of classical mobile channel (TU6) for DVB-T2. These evaluations are given for different Doppler frequencies in a classical SFN (Single Frequency Network) compared to distributed MISO. Laboratory and field measurements are presented. With the receiver used for our experiments, the results show clearly the quality degradation of received signals for distributed MISO compared to classic SFN. These results are useful for the study and the determination of the current mobile performance of DVB-T2 and network design and may also be useful for upcoming standards such as DVB-NGH (Next Generation Handheld).","PeriodicalId":413534,"journal":{"name":"2012 19th International Conference on Telecommunications (ICT)","volume":"124 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":"131598501","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

Successive refinement of side information using adaptive search area for long duration GOPs in distributed video coding 利用自适应搜索区域对分布式视频编码中长时间GOPs的边信息进行逐次细化

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221275

Abdalbassir Abou-Elailah, F. Dufaux, Marco Cagnazzo, B. Pesquet-Popescu, J. Farah

{"title":"Successive refinement of side information using adaptive search area for long duration GOPs in distributed video coding","authors":"Abdalbassir Abou-Elailah, F. Dufaux, Marco Cagnazzo, B. Pesquet-Popescu, J. Farah","doi":"10.1109/ICTEL.2012.6221275","DOIUrl":"https://doi.org/10.1109/ICTEL.2012.6221275","url":null,"abstract":"In distributed video coding, the reference frames are used to generate a side information at the decoder in order to decode the Wyner-Ziv frame. The quality of side information has a strong impact on the coding efficiency of distributed video coding. The estimation of the side information becomes less accurate when the temporal distance between the neighboring reference frames increases or when the sequence contains fast motion. In this paper, we propose a new method based on successive refinement of the side information by adapting the motion search area after decoding the first DCT band. More specifically, different search areas are initially set, according to the temporal distance between the neighboring reference frames. Furthermore, the size of the search area is adapted to the motion content after decoding the first DCT band by using the partially decoded Wyner-Ziv frame. This adapted search area is used in order to refine the side information after decoding each remaining DCT band. The experimental results show that the proposed technique allows an improvement in rate distortion performance that can reach 0.7 dB for a GOP size of 8, compared to the method where a constant search area is used, and a significant gain up to 3.23 dB, with respect to DISCOVER codec. The improvement in the quality of the final side information reaches 5.6 dB for some frames, compared to constant search area. Moreover, the proposed method reduces significantly the decoding time for all test sequences.","PeriodicalId":413534,"journal":{"name":"2012 19th International Conference on Telecommunications (ICT)","volume":"55 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":"130468595","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

Field measurement based SVC performance analysis over DVB-T2 Lite 基于现场测量的DVB-T2 Lite SVC性能分析

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221325

K. Nybom, S. Gronroos, J. Björkqvist

{"title":"Field measurement based SVC performance analysis over DVB-T2 Lite","authors":"K. Nybom, S. Gronroos, J. Björkqvist","doi":"10.1109/ICTEL.2012.6221325","DOIUrl":"https://doi.org/10.1109/ICTEL.2012.6221325","url":null,"abstract":"The DVB-T2 standard introduces the possibility to use several physical streams in one transmission multiplex. These streams can be transmitted using different modulation and physical layer code rates, providing unequal error protection. The Scalable Video Coding (SVC) extension of H.264 provides video content where video with different quality can be partitioned into separate bit streams. When applying SVC in a DVB-T2 system, the base layer bit stream of the video can be broadcasted with high error protection, whereas enhancement layers, e.g. high definition, can be transmitted with lower error protection, but with higher bandwidth utilization. In this paper, broadcasting of SVC in a DVB-T2 Lite system is explored. Given equal bandwidth utilization and video quality constraints, the broadcasting of SVC video is compared to the simulcasting of separately coded H.264/AVC video streams. The study is based on a time series of real world measured signal strengths combined with DVB-T2 Lite physical layer simulations, and the results indicate that broadcasting of SVC provides an overall better end-user experience as compared to simulcasting of AVC video.","PeriodicalId":413534,"journal":{"name":"2012 19th International Conference on Telecommunications (ICT)","volume":"66 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":"131318686","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

Timing synchronisation method for MIMO-OFDM system using orthogonal preamble MIMO-OFDM系统的正交前导定时同步方法

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221286

A. Rachini, A. Beydoun, F. Nouvel, B. Beydoun

引用次数: 10

A spatial diversity reception of binary signal transmission over Rayleigh fading channels with correlated impulse noise 具有相关脉冲噪声的瑞利衰落信道上二进制信号传输的空间分集接收

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221215

Khodr A. Saaifan, W. Henkel

引用次数: 1

Enhanced spatial multiplexing for rate-2 MIMO of DVB-NGH system DVB-NGH系统中速率为2的MIMO增强空间复用

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221323

S. Moon, W. Ko, David Vargas, D. G. Serrano, M. D. Nisar, V. Pauli

引用次数: 16

SINR based network selection strategy in integrated heterogeneous networks 综合异构网络中基于SINR的网络选择策略

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221276

Ahmad Jabban, Y. Nasser, M. Hélard

引用次数: 14

Statistical decision making method for cognitive radio 认知无线电的统计决策方法

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221311

S. Bourbia, Daniel Le Guennec, K. Grati, A. Ghazel

引用次数: 5

Sparse signal processing using iterative method with adaptive thresholding (IMAT) 自适应阈值迭代稀疏信号处理

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221328

F. Marvasti, M. Azghani, P. Imani, P. Pakrouh, Seyed Javad Heydari, A. Golmohammadi, A. Kazerouni, M. M. Khalili

{"title":"Sparse signal processing using iterative method with adaptive thresholding (IMAT)","authors":"F. Marvasti, M. Azghani, P. Imani, P. Pakrouh, Seyed Javad Heydari, A. Golmohammadi, A. Kazerouni, M. M. Khalili","doi":"10.1109/ICTEL.2012.6221328","DOIUrl":"https://doi.org/10.1109/ICTEL.2012.6221328","url":null,"abstract":"Classical sampling theorem states that by using an anti-aliased low-pass filter at the Nyquist rate, one can transmit and retrieve the filtered signal. This approach, which has been used for decades in signal processing, is not good for high quality speech, image and video signals where the actual signals are not low-pass but rather sparse. The traditional sampling theorems do not work for sparse signals. Modern approach, developed by statisticians at Stanford (Donoho and Candes), give some lower bounds for the minimum sampling rate such that a sparse signal can be retrieved with high probability. However, their approach, using a sampling matrix called compressive matrix, has certain drawbacks: Compressive matrices require the knowledge of all the samples, which defeats the whole purpose of compressive sampling! Moreover, for real signals, one does not need a compressive matrix and we shall show in this invited paper that random sampling performs as good as or better than compressive sampling. In addition, we show that greedy methods such as Orthogonal Matching Pursuit (OMP) are too complex with inferior performance compared to IMAT and other iterative methods. Furthermore, we shall compare IMAT to OMP and other reconstruction methods in term of complexity and show the advantages of IMAT. Various applications such as image and speech recovery from random or block losses, salt & pepper noise, OFDM channel estimation, MRI, and finally spectral estimation will be discussed and simulated.","PeriodicalId":413534,"journal":{"name":"2012 19th International Conference on Telecommunications (ICT)","volume":"40 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":"133809739","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: 36

Measurements of large-scale variations caused by vehicular traffic in small-cells 在小单元中测量由车辆交通引起的大尺度变化

2012 19th International Conference on Telecommunications (ICT) Pub Date : 2012-04-23 DOI: 10.1109/ICTEL.2012.6221313

L. Maviel, A. Cordonnier, Y. Lostanlen, J. Gorce

引用次数: 5