2007 3rd IEEE/IFIP International Conference in Central Asia on Internet最新文献_第6页

Joint frame and frequency synchronization for MIMO OFDM systems with ZCZ sequences 具有ZCZ序列的MIMO OFDM系统的联合帧和频率同步

2007 3rd IEEE/IFIP International Conference in Central Asia on Internet Pub Date : 2007-12-12 DOI: 10.1109/CANET.2007.4401715

M. Akbari, M. Ahmadian, S. Salari

{"title":"Joint frame and frequency synchronization for MIMO OFDM systems with ZCZ sequences","authors":"M. Akbari, M. Ahmadian, S. Salari","doi":"10.1109/CANET.2007.4401715","DOIUrl":"https://doi.org/10.1109/CANET.2007.4401715","url":null,"abstract":"Repeat of preamble is a usual method for time and frequency synchronization in a large group of multicarrier systems. The essential drawback of this method is reduction of maximum estimated frequency offset range with increasing the length of preamble. Recently, Zhang et al. proposed a method for joint frame synchronization and carrier frequency offset estimation scheme in OFDM systems. To the best knowledge of the authors, no extend of this method for MIMO-OFDM systems have been presented in the literature yet. In this paper we propose a new extension of joint frame and frequency synchronization of MIMO-OFDM systems with the preamble we name it \"Mirror preamble\". Increase the maximum carrier frequency offset acquisition range up to one half of the total bandwidth of all subcarriers is a desire result obtained from mirror preamble. In this paper we have used Zero Correlation Zone (ZCZ) sequences in the proposed preamble structure and to the contrary of Zhang et al. that neglected the effects of dispersive multi-path channel in their analysis, we have a discussion about reduction of these effects in the methods based mirror preamble.","PeriodicalId":413993,"journal":{"name":"2007 3rd IEEE/IFIP International Conference in Central Asia on Internet","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114862181","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

Model of broadband associative switching network 宽带联合交换网络模型

2007 3rd IEEE/IFIP International Conference in Central Asia on Internet Pub Date : 2007-12-12 DOI: 10.1109/CANET.2007.4401702

S. A. Sadchikova, Aleksey V. Son, V. M. Son

引用次数: 2

Optimization of the spectral and power efficiency of m-ary channels in wireless and mobile systems 无线和移动系统中千兆信道频谱和功率效率的优化

2007 3rd IEEE/IFIP International Conference in Central Asia on Internet Pub Date : 2007-12-12 DOI: 10.1109/CANET.2007.4401665

A. Markhasin, A. Kolpakov, V. Drozdova

引用次数: 5

Telecommunication services diffusion in cis: dynamics of competition and complementarity among telecommunication services 独联体的电信服务扩散:电信服务之间的竞争动态和互补性

2007 3rd IEEE/IFIP International Conference in Central Asia on Internet Pub Date : 2007-12-12 DOI: 10.1109/CANET.2007.4401678

N. Mahamatov, Jongsu Lee, Min-Kyu Lee

{"title":"Telecommunication services diffusion in cis: dynamics of competition and complementarity among telecommunication services","authors":"N. Mahamatov, Jongsu Lee, Min-Kyu Lee","doi":"10.1109/CANET.2007.4401678","DOIUrl":"https://doi.org/10.1109/CANET.2007.4401678","url":null,"abstract":"This paper aims at presenting an analysis of the telecommunication services diffusion process in Commonwealth of Independent States (CIS). Also to investigate diffusion dynamics and to analyze complementarity and competition trends among technologies. To identify the most important factors associated with Telecommunication services diffusion, determinants and their influences in the diffusion among the CIS countries. The Telecommunication services in this analysis include: Internet, mobile cellular phone and fixed telephone services. Present study assigns Internet service as well as fixed telephone and mobile phone service to the category of telecommunications services by incorporating the effects of the Internet in the telecommunications service market. In this paper we apply modified diffusion models to telecommunication growth in CIS countries. Empirical analysis presents - telecommunication services in CIS are mostly complementary to each other. Analyses of estimation results and factors associated with ICT diffusion dynamism can play significant role to provide policy recommendations for these countries and for other developing countries to achieve the desired pervasiveness of the information communication technologies.","PeriodicalId":413993,"journal":{"name":"2007 3rd IEEE/IFIP International Conference in Central Asia on Internet","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122999525","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

Simulation and assessment of WiMAX network performance in different environments 不同环境下WiMAX网络性能的仿真与评估

2007 3rd IEEE/IFIP International Conference in Central Asia on Internet Pub Date : 2007-12-12 DOI: 10.1109/CANET.2007.4401681

M. Shafik, H.M. El Badawy, G. Selim

引用次数: 2

PAPR reduction in the OFDM system employing tone reservation based on FFT/IFFT 基于FFT/IFFT音调保留的OFDM系统中PAPR的降低

2007 3rd IEEE/IFIP International Conference in Central Asia on Internet Pub Date : 2007-12-04 DOI: 10.1109/ISCIT.2007.4391991

Gang Yang, Zhengjie Yang

引用次数: 11

To a technique of optimization of information safety in networks and systems of telecommunication 电信网络和系统的信息安全优化技术

2007 3rd IEEE/IFIP International Conference in Central Asia on Internet Pub Date : 2007-09-01 DOI: 10.1109/CANET.2007.4401680

H. Nigmatov, D. Abdukadirov, D. Abdukadirova, D. Shaykhutdinova, F. Rakhimova

引用次数: 1

Mathematical model of a photodiode and photo receiving device on the field-effect transistor with p-n controlling junction as a current amplifier 以pn控制结作为电流放大器的场效应晶体管上光电二极管和光接收器件的数学模型

2007 3rd IEEE/IFIP International Conference in Central Asia on Internet Pub Date : 2007-09-01 DOI: 10.1109/CANET.2007.4401699

N. Yunusov, R.K. Atametov, S. Yuldasheva

引用次数: 0