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2009 International Conference on Advanced Technologies for Communications最新文献

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Candidates for estimating carrier frequency offset in MIMO systems 候选估计载波频率偏移在MIMO系统
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349369
Ngoc Dung Tran, Thanh-Nga Mai, V. Y. Vu, D. Pham, Xuan Quynh Nguyen
{"title":"Candidates for estimating carrier frequency offset in MIMO systems","authors":"Ngoc Dung Tran, Thanh-Nga Mai, V. Y. Vu, D. Pham, Xuan Quynh Nguyen","doi":"10.1109/ATC.2009.5349369","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349369","url":null,"abstract":"In wireless communication, the mismatch between the transmit and receive oscillators and Doppler effect result in carrier frequency offset (CFO) which has a big effect on communication systems. Estimation of frequency offset is becoming an important, urgent, and practical issue needed to be cared for, especially in multiple input - multiple output (MIMO) systems. The fact shows that an inaccurate frequency offset estimate will reduce the accuracy of other system parameter estimates, which diminishes the expected spectral efficiency of the MIMO antenna system. Regarding to this problem, two algorithm candidates are presented to estimate carrier frequency offset exactly in a MIMO system in this paper. While the first one focus on matrix algorithm, the second one which is more complicated is a subspace-based approach called MUSIC (MUtilple SIgnal Classification) to overcome the limit of DFT resolution.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129224604","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 fiber-based limiter at 170 Gbit/s for all-optical regeneration 基于光纤的限速器，速率为170 Gbit/s，用于全光再生
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349263
T. Nguyen, M. C. e Silva, M. Gay, L. Bramerie, T. Chartier, J. Simon, J. Fatome, C. Finot
{"title":"A fiber-based limiter at 170 Gbit/s for all-optical regeneration","authors":"T. Nguyen, M. C. e Silva, M. Gay, L. Bramerie, T. Chartier, J. Simon, J. Fatome, C. Finot","doi":"10.1109/ATC.2009.5349263","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349263","url":null,"abstract":"We report the numerical and experimental studies of a spectrally filtered fiber-based optical limiter at 170 Gbit/s. The device, including less than 1 km-long of highly nonlinear optical fiber and a 3 nm-width filter, exhibits good performance at an average input power of 14.5 dBm. No power penalty has been observed and a strong robustness against optical noise has been demonstrated.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126395425","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
An Analytical method for calculating the limitation of beam scanning in Uniform Linear Array (ULA) 均匀线阵(ULA)中波束扫描极限的解析计算方法
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349450
Xuan Viet Tran, V. Pham
{"title":"An Analytical method for calculating the limitation of beam scanning in Uniform Linear Array (ULA)","authors":"Xuan Viet Tran, V. Pham","doi":"10.1109/ATC.2009.5349450","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349450","url":null,"abstract":"The limitation of beam scanning in a Uniform Linear Array (ULA) is determined as a maximum range of scanning; within that the sidelobe of the pattern still not be exceed the certain level. There are some calculations for this purpose by numeric method; these are convenient for some practical applications. This paper presents a new approach to calculate the above limitation by analytical method. The simple analytical formula is obtained and the comparison of derived results by two methods is presented.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121044050","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
Network traffic simulation based on Network Processor 基于网络处理器的网络流量仿真
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349452
Shuai Yuan, Gang Zhou, B. Tian, Yi Jin1
{"title":"Network traffic simulation based on Network Processor","authors":"Shuai Yuan, Gang Zhou, B. Tian, Yi Jin1","doi":"10.1109/ATC.2009.5349452","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349452","url":null,"abstract":"Achievements of network traffic simulation provide realistic, feasible and accurate methods of measuring bandwidth, latency, jitter and so on. However as the development of networking technology, traditional manners are becoming insufficient to provide high bandwidth matching the real network, nor accurate statistics characteristic such as self-similarity. In this paper we propose the Network Traffic Simulation platform based on Network Processor (NTS-NP). The platform has achieved: 1) high bandwidth and real-time traffic generation; 2) high precision of self-similarity of the flow, which is now considered to be one of the basic characteristics of network traffic. In our platform, Cavium OCTEON CN3860 is chosen as the core in order to gain the ability of high speed packets assembling and transmitting, and direct control of the interface hardware. ON/OFF aggregation model is implemented to generate self-similarity and a discrete-event driven based algorithm is proposed to improve the traditional implementation of the model. We estimate the Hurst parameter of synthetic traffic by R/S statistics method and wavelet estimator. The validation of the platform is also empirically discussed and proved.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"14 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122480572","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
Performance of STBC MIMO-OFDM using pilot-aided channel estimation and adaptive pre-distortion 基于导频辅助信道估计和自适应预失真的STBC MIMO-OFDM性能研究
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349319
T. D. Tuyen, T.D. Tan, T. A. Vu, H. Tue
{"title":"Performance of STBC MIMO-OFDM using pilot-aided channel estimation and adaptive pre-distortion","authors":"T. D. Tuyen, T.D. Tan, T. A. Vu, H. Tue","doi":"10.1109/ATC.2009.5349319","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349319","url":null,"abstract":"In this paper, we focus on MIMO-OFDM systems that simultaneously perform channel estimation, space-time coding and adaptive pre-distortion in order to combat additive noise, multipath fading and nonlinear effect of HPA. The performance improvement is confirmed by simulations. Results show that the proposed MIMO-OFDM scheme is quite robust in simulation environments.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131378216","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
Security analysis of certificate authentication in Chinese WLAN standard 中国WLAN标准中证书认证的安全性分析
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349356
Song Yubo, H. Aiqun, Kaizhi Chen
{"title":"Security analysis of certificate authentication in Chinese WLAN standard","authors":"Song Yubo, H. Aiqun, Kaizhi Chen","doi":"10.1109/ATC.2009.5349356","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349356","url":null,"abstract":"The WAI (WLAN Authentication Infrastructure), is the authentication protocol in the Chinese Wireless LAN standard. This protocol, similar as 802.11i, adopts port-based access control and involves three entities in the authentication process. The three entities named in Chinese standard are ASUE (Wireless device), AE (Access Point) and ASE (Authentication Server). The WAI is composed of a mutual public key certificates authentication and a key-exchange agreement. We analyze the certificate authentication of WAI protocol using a finite-state verification tool and find that the authentication protocol can't resist the denial of service attack. Attackers can forge the messages to produce inconsistent keys in peers. Several amendments are discussed in this papers.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"580 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116539970","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
Control of autonomous underwater vehicles using adaptive neural network 基于自适应神经网络的自主水下航行器控制
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349385
P. Nguyen, Y. Jung
{"title":"Control of autonomous underwater vehicles using adaptive neural network","authors":"P. Nguyen, Y. Jung","doi":"10.1109/ATC.2009.5349385","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349385","url":null,"abstract":"This paper presents an application of adaptive neural network to control of autonomous underwater vehicle. Adaptive neural networks by adaptive interaction are designed for controlling heading, depth and speed of the vehicle. Computer simulations are carried out to verify the control system. Good results are obtained under the influence of measurement noise and current.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130018715","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
An efficiently phase-shift frequency domain method for super-resolution image processing 一种有效的超分辨率图像处理相移频域方法
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349335
Cao Bui-Thu, T. Do-Hong, T. Le-Tien, Hoang Nguyen-Duc
{"title":"An efficiently phase-shift frequency domain method for super-resolution image processing","authors":"Cao Bui-Thu, T. Do-Hong, T. Le-Tien, Hoang Nguyen-Duc","doi":"10.1109/ATC.2009.5349335","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349335","url":null,"abstract":"How to reconstruct a high resolution and quality from low resolution images captured from a digital camera is always the top target of any image processing system. Exploit the aliasing feature of sampled images, we propose a new technique to register exactly the motions between images, including rotations and shifts, by using only frequency domain phase-shift method. Based on registered parameters, the precise alignment of input images are done to create a high-resolution by using interpolation methods. It is more exactly when we compare our algorithm to other algorithms in simulation and practical experiments. The visual results of super-resolution images reconstruced by our algorithm are better than that of other algorithms. It is possible to apply our algorithm to increase resolution of digital camera or video systems.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116058221","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: 7
Performance of BCH coding on transmission of compressed images over PLC channels BCH编码在PLC信道上压缩图像传输中的性能
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349348
N. Al-Hinai, Z. M. Hussain, A. Sadik
{"title":"Performance of BCH coding on transmission of compressed images over PLC channels","authors":"N. Al-Hinai, Z. M. Hussain, A. Sadik","doi":"10.1109/ATC.2009.5349348","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349348","url":null,"abstract":"In this paper, we implement Bose-Chaudhuri- Hocquenghen (BCH) coding to study the performance of Power Line Channel (PLC) impaired by impulsive noise and AWGN. Quadrature amplitude modulation (QAM) is employed and orthogonal frequency division multiplexing (OFDM) is used as a transmission scheme. Block truncation coding (BTC) is used for the compression of the image. A comparison is made between uncoded system and BCH coding system. The performance of the system is assessed by the quality of the image for different sizes of BCH encoder, in three different environments. Simulation results showed that with BCH coding, the performance of the PLC system has improved dramatically in all three impulsive scenarios.","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128153590","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
Design and implement of compact UWB bandpass filter with a frequency notch by consisting of coupled Microstrip line structure, DGS and EOS 由耦合微带线结构、DGS和EOS组成的带频率陷波的紧凑型超宽带带通滤波器的设计与实现
2009 International Conference on Advanced Technologies for Communications Pub Date : 2009-12-08 DOI: 10.1109/ATC.2009.5349581
Wei-Yu Zong, Xiaowei Zhu, Chang-Jiang You, Jingqi Wang
{"title":"Design and implement of compact UWB bandpass filter with a frequency notch by consisting of coupled Microstrip line structure, DGS and EOS","authors":"Wei-Yu Zong, Xiaowei Zhu, Chang-Jiang You, Jingqi Wang","doi":"10.1109/ATC.2009.5349581","DOIUrl":"https://doi.org/10.1109/ATC.2009.5349581","url":null,"abstract":"In this paper, an ultra-wideband (UWB) bandpass filter with a frequency notch is designed and implemented. The proposed filter is based on coupled Microstrip line with U-shaped defected ground structure (DGS). By introducing Embedded Open Stubs (EOS) into input and output feed lines, the UWB bandpass filter can get a band-notched characteristic at the appointed frequency band. Several compensatory lines are introduced to compensate the damage bringing by EOS. The test results show that 3 dB pass-band is from 3.1 GHz to 10.6 GHz. The depth of the frequency notch is about −30dB at 5.8 GHz, which is deep enough to choke back interference from other wireless communication systems operating at the same frequency. The insertion loss in the pass-band is less than 1 dB (including the insertion loss of two SMA connectors).","PeriodicalId":311235,"journal":{"name":"2009 International Conference on Advanced Technologies for Communications","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121737146","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: 7
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