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2008 International Conference on Advanced Technologies for Communications最新文献

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A scheme to compensate for the input multipath channel effect in an interference cancellation repeater for mobile communication systems 一种在移动通信系统干扰消除中继器中补偿输入多径信道效应的方案
2008 International Conference on Advanced Technologies for Communications Pub Date : 2008-10-06 DOI: 10.1109/ATC.2008.4760527
Moohong Lee, Byungjik Keum, Y. S. Shim, Hwang-Soo Lee
{"title":"A scheme to compensate for the input multipath channel effect in an interference cancellation repeater for mobile communication systems","authors":"Moohong Lee, Byungjik Keum, Y. S. Shim, Hwang-Soo Lee","doi":"10.1109/ATC.2008.4760527","DOIUrl":"https://doi.org/10.1109/ATC.2008.4760527","url":null,"abstract":"Conventional interference cancellation (ICAN) techniques are mainly used to prevent feedback oscillation of a radio repeater when the repeaterpsilas gain is larger than the isolation between the transmit and receive antennas of the repeater. Therefore, the output signal distortion of the radio repeater, which is caused by the multipath channel between the repeaterpsilas input antenna and a base station, is not properly compensated. In this paper, a scheme to compensate for the output signal distortion in conventional ICAN repeaters is proposed. The compensation is performed by estimating the input multipath channel, inverting the estimated channel, and compensating the input signal using the inverted channel prior to feedback signal cancellation. The validity of the proposed scheme is confirmed by showing that the output signal quality of a conventional ICAN repeater is considerably improved by this scheme.","PeriodicalId":429449,"journal":{"name":"2008 International Conference on Advanced Technologies for Communications","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134185164","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
A data transmission method in ZigBee networks using power efficient device 一种采用节能设备的ZigBee网络数据传输方法
2008 International Conference on Advanced Technologies for Communications Pub Date : 2008-10-01 DOI: 10.1109/ATC.2008.4760545
D. Yun, S. Cho
{"title":"A data transmission method in ZigBee networks using power efficient device","authors":"D. Yun, S. Cho","doi":"10.1109/ATC.2008.4760545","DOIUrl":"https://doi.org/10.1109/ATC.2008.4760545","url":null,"abstract":"In this paper, we propose the method that reduces the power consumption by decreasing the network traffic on the ZED having the power saving feature. By using the proposed method, in order to recognize the ON-point time period of the ZEDpsilas RF receiver, the parent node does not receive a data request periodically from the ZED. Therefore, the network traffic between the ZED and the parent node is reduced. This method is used to transmit the data efficiently and reliably. Based on the current ZigBee stack application support sub-layer (APS), we present the ZigBee end device data transmission (ZEDDT) method. The simulation results by Network Simulator-2 (NS2) are included in order to demonstrate the validity and the usefulness of the proposed method.","PeriodicalId":429449,"journal":{"name":"2008 International Conference on Advanced Technologies for Communications","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126105620","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: 9
An approach for passive radar using a smart antenna system 一种采用智能天线系统的无源雷达方法
2008 International Conference on Advanced Technologies for Communications Pub Date : 2008-10-01 DOI: 10.1109/ATC.2008.4760572
Tran Cao Quyen, B. G. Duong, P. Fortier, Phan Anh
{"title":"An approach for passive radar using a smart antenna system","authors":"Tran Cao Quyen, B. G. Duong, P. Fortier, Phan Anh","doi":"10.1109/ATC.2008.4760572","DOIUrl":"https://doi.org/10.1109/ATC.2008.4760572","url":null,"abstract":"An antenna without phase center system used for DOA estimation and beam steering was introduced in. In the radar problem, the antenna can receive the signals scattered from a moving target. In this paper, an approach for passive radar using a smart antenna system is introduced. We assume that the primary transmitted signal comes from a known fix voice broadcasting station. The principle of the passive radar are presented.","PeriodicalId":429449,"journal":{"name":"2008 International Conference on Advanced Technologies for Communications","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116385975","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
Implementation of an embedded software modem platform 一个嵌入式软件调制解调器平台的实现
2008 International Conference on Advanced Technologies for Communications Pub Date : 2008-10-01 DOI: 10.1109/ATC.2008.4760596
Seon Gyu Kim, S. Cho
{"title":"Implementation of an embedded software modem platform","authors":"Seon Gyu Kim, S. Cho","doi":"10.1109/ATC.2008.4760596","DOIUrl":"https://doi.org/10.1109/ATC.2008.4760596","url":null,"abstract":"In this paper we propose hardware architecture of the embedded software modem platform. The hardware platform consist of a single S3C2410 ARM which its operation speed is 200 MHz, three TMS320C6416T DSPs which has a 1GHz clock, a single Stratix II EP2S60F672C5 FPGA which has 900 K gates and two two-channel ADCs and DACs which can support up to 125 MHz sampling rate. The embedded Linux 2.4 is ported on the ARM and the DSP has a transmitter and receiver and two more receivers. There are two DSPs in the receiver to support diverse signal processing algorithms which is required in the next generation communication system receiver. The FIR filter is implemented for over/down-sampling and to eliminate the harmonic elements and the aliasing in the FPGA. Also the host and client USB, RS232 for serial communication and 10 Mbps LAN for TCP/IP communication are contained for external interface. We implement IEEE 802.11a PHY part to verify the effectiveness of the embedded platform architecture. Additionally, we test and verify the platform performance through real-time video, voice and text transmission.","PeriodicalId":429449,"journal":{"name":"2008 International Conference on Advanced Technologies for Communications","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116757533","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
BER performance of decode-and-forward relaying using selection combining over Rayleigh fading channels 瑞利衰落信道上选择组合译码转发中继的误码率性能
2008 International Conference on Advanced Technologies for Communications Pub Date : 2008-10-01 DOI: 10.1109/ATC.2008.4760581
B. N. Quoc, H. Kong, Chien Hoang Dinh, T. Le Tien
{"title":"BER performance of decode-and-forward relaying using selection combining over Rayleigh fading channels","authors":"B. N. Quoc, H. Kong, Chien Hoang Dinh, T. Le Tien","doi":"10.1109/ATC.2008.4760581","DOIUrl":"https://doi.org/10.1109/ATC.2008.4760581","url":null,"abstract":"This paper offers performance analysis of decode-and-forward protocol employing selection combining (SC) at the destination. For an arbitrary number of relays, BER for MPSK of the system is investigated in both independent identically distributed (i.i.d) and independent but not identically distributed (i.n.d.) Rayleigh fading channels. A variety of simulations are performed and show that they match exactly with analytic ones. In addition, our results also show that the optimum number of relays depend not only on channel conditions (operating SNR) but also on modulation scheme which we exploit.","PeriodicalId":429449,"journal":{"name":"2008 International Conference on Advanced Technologies for Communications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129462898","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: 10
Mobile Flexible Networks: The challenges ahead 移动灵活网络:未来的挑战
2008 International Conference on Advanced Technologies for Communications Pub Date : 2008-10-01 DOI: 10.1109/ATC.2008.4760505
M. Debbah
{"title":"Mobile Flexible Networks: The challenges ahead","authors":"M. Debbah","doi":"10.1109/ATC.2008.4760505","DOIUrl":"https://doi.org/10.1109/ATC.2008.4760505","url":null,"abstract":"The general framework of mobile flexible networks is to design self-organizing secure networks where terminals and base stations interact and self-adapt in an intelligent manner without the need of a central controller (or with the right amount of regulation...just enough to let the agents in the network exploit fully the degrees of freedom). Of course, the design depends on the mobility pattern and delay tolerance as in highly mobile environments, exchange of control signaling bears a huge cost whereas for fixed (non-mobile) networks, the designer can dedicate a fraction of the rate (which is negligible in terms of overhead) to optimize the system. One of the big challenges is to find how to optimally split the intelligence between cognitive terminals and cognitive networks. In this paper, we discuss the challenges ahead and provide some research directions to develop the theoretical foundations of these networks.","PeriodicalId":429449,"journal":{"name":"2008 International Conference on Advanced Technologies for Communications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127965028","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: 47
Designing 2.45 GHz meander line antenna for RFID RFID 2.45 GHz弯曲线天线设计
2008 International Conference on Advanced Technologies for Communications Pub Date : 2008-10-01 DOI: 10.1109/ATC.2008.4760621
D. D. Sang
{"title":"Designing 2.45 GHz meander line antenna for RFID","authors":"D. D. Sang","doi":"10.1109/ATC.2008.4760621","DOIUrl":"https://doi.org/10.1109/ATC.2008.4760621","url":null,"abstract":"Summary form only given. This paper presents the design simulation and measured performance of a 2.45 GHz meander line antenna for RFID, are fabricated on a FR-4 PCB substrate. HFSS simulator is used in the design simulation of this antenna structure. Numerical and measured results of the antenna radiation characteristics, including return loss, VSWR and radiation pattern coverage, are presented.","PeriodicalId":429449,"journal":{"name":"2008 International Conference on Advanced Technologies for Communications","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115789322","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 message-passing approach to min-cost distributed clustering in wireless sensor networks 无线传感器网络中最小代价分布式聚类的消息传递方法
2008 International Conference on Advanced Technologies for Communications Pub Date : 2008-10-01 DOI: 10.1109/ATC.2008.4760547
H. Ngo, Tran Minh Tam, Young-Koo Lee, Sungyoung Lee
{"title":"A message-passing approach to min-cost distributed clustering in wireless sensor networks","authors":"H. Ngo, Tran Minh Tam, Young-Koo Lee, Sungyoung Lee","doi":"10.1109/ATC.2008.4760547","DOIUrl":"https://doi.org/10.1109/ATC.2008.4760547","url":null,"abstract":"Clustering is an effective approach to hierarchically organizing network topology for efficient data aggregation in wireless sensor networks (WSNs). In this paper, we present a new approach to energy-efficient, distributed clustering in WSNs using the recent modeling and computational methodology of factor graphs and message-passings. We first formulate the sensor clustering as an optimization problem that minimizes the total data transmission cost weighted by node residual energy. We then derive simplified, localized, min-sum recursive message-passing rules which can elect a near-optimal set of cluster heads. We show through simulations that the proposed algorithm quickly achieves a good approximation of the minimum cost found by a centralized algorithm, and effectively prolongs the network lifetime compared to a popular sensor clustering algorithm.","PeriodicalId":429449,"journal":{"name":"2008 International Conference on Advanced Technologies for Communications","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131560353","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
Effects of sun transit and rainfall on satellite communication links 太阳过境和降雨对卫星通信链路的影响
2008 International Conference on Advanced Technologies for Communications Pub Date : 2008-10-01 DOI: 10.1109/ATC.2008.4760567
X. Vuong
{"title":"Effects of sun transit and rainfall on satellite communication links","authors":"X. Vuong","doi":"10.1109/ATC.2008.4760567","DOIUrl":"https://doi.org/10.1109/ATC.2008.4760567","url":null,"abstract":"Satellite communication links are affected by sun transit and rainfall, among others. These affects must be taken into accounts in satellite link design and operation. This talk describes the effects and techniques to quantify and alleviate the effects. Sun transit causes satellite link outage and occurs when the pointing angles from the receive earth station to the satellite and to the sun are so nearly coincident that additional noise power presented by the sun causes the demodulator to operate below its Eb/No-threshold. In general a sun transit outage cannot be avoided and occurs around the spring and fall equinoxes for a few minutes a day and for several days; its occurrence, however, can be predicted in advance with an accuracy of less than a minute by the Vuong & Forsey technique. Rainfall attenuates and depolarizes the carrier; it also raises the antenna temperature of a receive earth station. Its affects are more pronounced at Ku-band and higher frequencies, at heavy rain zones such as Vietnam and at low elevation angles. Rain attenuation statistics can be predicted from various models with the most popular ones being ITU's and Crane's. The combined effects of uplink rainfall and downlink rainfall to a satellite communication link can be estimated accurately and simply by the Vuong & Vuong technique. Rainfall affects can be alleviated through design satellite links with high link margins, use of ALC (automatic level control) available with a satellite transponder, UPC (uplink power control) which can be equipped to a transmit earth station, adaptive data rate or adaptive FEC (forward error correction) coding rate, among others.","PeriodicalId":429449,"journal":{"name":"2008 International Conference on Advanced Technologies for Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130970027","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
Optimum wavelet thresholding based on structural similarity quality assessment for FFT-OFDM 基于结构相似度评价的FFT-OFDM优化小波阈值
2008 International Conference on Advanced Technologies for Communications Pub Date : 2008-10-01 DOI: 10.1109/ATC.2008.4760614
N. Al-Hinai, K. Al-Mawali, A. Sadik, Z. M. Hussain
{"title":"Optimum wavelet thresholding based on structural similarity quality assessment for FFT-OFDM","authors":"N. Al-Hinai, K. Al-Mawali, A. Sadik, Z. M. Hussain","doi":"10.1109/ATC.2008.4760614","DOIUrl":"https://doi.org/10.1109/ATC.2008.4760614","url":null,"abstract":"Transmission of compressed image data over Gaussian wireless channel using OFDM scheme is addressed. A wavelet thresholding technique based on automatic image quality assessment of image, which was proved to be highly conformed with the human visual evaluation, is utilized to obtain an optimum trade-off between the compression ratio and image quality.","PeriodicalId":429449,"journal":{"name":"2008 International Conference on Advanced Technologies for Communications","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133364563","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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