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2007 Wireless Telecommunications Symposium最新文献

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A framework for pipeline infrastructure monitoring using wireless sensor networks 基于无线传感器网络的管道基础设施监测框架
2007 Wireless Telecommunications Symposium Pub Date : 2007-04-26 DOI: 10.1109/WTS.2007.4563333
I. Jawhar, N. Mohamed, K. Shuaib
{"title":"A framework for pipeline infrastructure monitoring using wireless sensor networks","authors":"I. Jawhar, N. Mohamed, K. Shuaib","doi":"10.1109/WTS.2007.4563333","DOIUrl":"https://doi.org/10.1109/WTS.2007.4563333","url":null,"abstract":"Ad hoc and sensor networks is a new area of research which is rapidly growing due to the development of new technologies in inexpensive sensors. These electronic devices have increased capabilities in processing speed, memory, communication and networking [21][22]. Such sensor networks have a vast amount of applications including environmental monitoring, military, ecology, agriculture, inventory control, robotics and health care. This paper discusses the issues and challenges in the use of this new and very promising technology in the protection and monitoring of the critical and essential infrastructures of pipelines carrying oil, gas, water, and other important resources. The paper presents an architectural model that can be used to provide this monitoring and control functions. The model includes an overview of networking and routing protocols that can be used to provide the necessary communications. In addition, the paper provides discussions and recommendations concerning network reliability and the use of different wireless sensor technologies and protocols.","PeriodicalId":296096,"journal":{"name":"2007 Wireless Telecommunications Symposium","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124914364","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: 141
Optimized iterative MAP ARQ for OFDM over rapidly-varying frequency-selective channels 快速变频选择信道OFDM的优化迭代MAP ARQ
2007 Wireless Telecommunications Symposium Pub Date : 2007-04-26 DOI: 10.1109/WTS.2007.4563342
T. Ketseoglou
{"title":"Optimized iterative MAP ARQ for OFDM over rapidly-varying frequency-selective channels","authors":"T. Ketseoglou","doi":"10.1109/WTS.2007.4563342","DOIUrl":"https://doi.org/10.1109/WTS.2007.4563342","url":null,"abstract":"In this paper, we propose an optimized OFDM iterative ARQ receiver, suitable for application in rapidly varying multipath channels. The receiver is an optimized MAP Turbo processor that exploits log likelihood ratio (LLR) information from previously failed transmissions. We show that this configuration achieves very high gains compared to a standard ARQ system by virtue of two co-operative mechanisms: First, by using (log likelihood ratios) LLR from previous decoding trials to improving the expectation maximization (EM) based algorithm channel tracking and LLR calculation during retransmissions and second by combining together the extrinsic detector LLR from previous reception attempts with the newly generated one from the retransmissions of a previously failed packet.","PeriodicalId":296096,"journal":{"name":"2007 Wireless Telecommunications Symposium","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121687469","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
Efficient loop filter design in FPGAs for Phase Lock Loops in high-datarate wireless receivers — theory and case study 高数据率无线接收机锁相环的fpga高效环路滤波器设计-理论与实例研究
2007 Wireless Telecommunications Symposium Pub Date : 2007-04-26 DOI: 10.1109/WTS.2007.4563303
Y. Linn
{"title":"Efficient loop filter design in FPGAs for Phase Lock Loops in high-datarate wireless receivers — theory and case study","authors":"Y. Linn","doi":"10.1109/WTS.2007.4563303","DOIUrl":"https://doi.org/10.1109/WTS.2007.4563303","url":null,"abstract":"In most contemporary phase lock loops (PLLs) used in high-datarate wireless receivers, some or all of the PLL 's components are implemented digitally, in particular the PLL's loop filter. In this paper we develop the theory behind new efficient structures for the implementation of loop filters within FPGAs (field programmable gate arrays) using fixed-point arithmetic. The theory is then investigated via a case study, in which we present FPGA hardware mapping results which show that employing the proposed method results in a decrease of more than 70% in the logic gate count needed as compared to the conventional implementation.","PeriodicalId":296096,"journal":{"name":"2007 Wireless Telecommunications Symposium","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134018706","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
Unified protocol stack architecture for 4G mobile terminals to support multiple radio access technologies 统一的4G移动终端协议栈架构，支持多种无线接入技术
2007 Wireless Telecommunications Symposium Pub Date : 2007-04-26 DOI: 10.1109/WTS.2007.4563322
S. Anand, R. Tyagi
{"title":"Unified protocol stack architecture for 4G mobile terminals to support multiple radio access technologies","authors":"S. Anand, R. Tyagi","doi":"10.1109/WTS.2007.4563322","DOIUrl":"https://doi.org/10.1109/WTS.2007.4563322","url":null,"abstract":"The next generation mobile handhelds need to focus on seamless Mobility and session continuity when the subscribers move frequently across different radio access networks. This paper presents a generic radio access abstraction layer (GRAAL) outlining the additional functionalities required at the mobile terminal that can decide on the fly for selecting the best radio access network according to the users choice and applications preferences. The proposed GRAAL will enable subscribers to benefit from high throughput and to maintain session continuity during roaming across several mobile networks.","PeriodicalId":296096,"journal":{"name":"2007 Wireless Telecommunications Symposium","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134286704","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
A point-process analysis of Spencer’s space-time extension of the IEEE 802.15.3a UWB channel model IEEE 802.15.3a超宽带信道模型Spencer时空扩展的点过程分析
2007 Wireless Telecommunications Symposium Pub Date : 2007-04-26 DOI: 10.1109/WTS.2007.4563319
Kei Hao, J. A. Gubner
{"title":"A point-process analysis of Spencer’s space-time extension of the IEEE 802.15.3a UWB channel model","authors":"Kei Hao, J. A. Gubner","doi":"10.1109/WTS.2007.4563319","DOIUrl":"https://doi.org/10.1109/WTS.2007.4563319","url":null,"abstract":"Considerable progress has recently been made in the theoretical analysis of the IEEE 802.15.3 a UWB channel model by treating it as a two-dimensional Poisson cluster process. Unfortunately, this only accounts for multipath arrival times and gains, not arrival angles. In this paper, it is shown that Spencer's extension of the channel model, which also accounts for arrival angles, can be accommodated in the cluster point process framework. Using this framework, closed-form expressions are derived for several quantities, including the power delay-angle profile and detectable-path delay-angle profile.","PeriodicalId":296096,"journal":{"name":"2007 Wireless Telecommunications Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132008946","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
FER regression analysis of DS-UWB-based WPAN 基于ds - uwb的WPAN的FER回归分析
2007 Wireless Telecommunications Symposium Pub Date : 2007-04-26 DOI: 10.1109/WTS.2007.4563335
F. Rango, F. Veltri, P. Fazio, A. Santamaria, M. Tropea, S. Marano
{"title":"FER regression analysis of DS-UWB-based WPAN","authors":"F. Rango, F. Veltri, P. Fazio, A. Santamaria, M. Tropea, S. Marano","doi":"10.1109/WTS.2007.4563335","DOIUrl":"https://doi.org/10.1109/WTS.2007.4563335","url":null,"abstract":"Ultra-Wideband (UWB) technology is at present defined as any wireless transmission scheme that occupies a fractional bandwidth ges20%, or more than 500 MHz of absolute bandwidth. In this paper we have considered an UWB system, based on Direct Sequence - UWB (DS-UWB) proposal standard, in an indoor multipath environment modeled in accordance with IEEE 802.15 channel modeling subcommittee. Performance are evaluated in terms of frame error rate (FER) vs. transmitter-receiver distance and frame size and finally a polynomial regression analysis is carried out on simulation results in order to obtain a closed formula to describe, for different scenarios, the FER as a function of data rates, frame size and distance between transmitter and receiver.","PeriodicalId":296096,"journal":{"name":"2007 Wireless Telecommunications Symposium","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132323392","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
Small and medium enterprises and the mobile revolution: Looking forward 中小企业与移动革命:展望
2007 Wireless Telecommunications Symposium Pub Date : 2007-04-26 DOI: 10.1109/WTS.2007.4563293
K. Passerini, K. Patten, Michael R. Bartolacci
{"title":"Small and medium enterprises and the mobile revolution: Looking forward","authors":"K. Passerini, K. Patten, Michael R. Bartolacci","doi":"10.1109/WTS.2007.4563293","DOIUrl":"https://doi.org/10.1109/WTS.2007.4563293","url":null,"abstract":"Mobile technologies offer new opportunities for small and medium enterprises (SMEs). SMEs that develop a mobility strategy to prepare for the future are taking the first step to becoming \"next-generation SMEs.\" This paper describes specific characteristics and advantages of next-generation small and medium enterprises, and highlights key issues and forward looking opportunities.","PeriodicalId":296096,"journal":{"name":"2007 Wireless Telecommunications Symposium","volume":"967 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123072178","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
An approach to dynamic service provisioning using a device management system 一种使用设备管理系统动态提供服务的方法
2007 Wireless Telecommunications Symposium Pub Date : 2007-04-26 DOI: 10.1109/WTS.2007.4563341
Kyounghee Jung, Injoo Choi, Sang-Woong Jeong
{"title":"An approach to dynamic service provisioning using a device management system","authors":"Kyounghee Jung, Injoo Choi, Sang-Woong Jeong","doi":"10.1109/WTS.2007.4563341","DOIUrl":"https://doi.org/10.1109/WTS.2007.4563341","url":null,"abstract":"Summary form only given. With the current prevalence of content-oriented communication services, the service environment for end-users to learn and to configure one's device has become more complicated and demanding. In particular, the device should be dynamically configured in accordance with the service subscription profile of the user and requires the timely changes in application modification or the user's new senice subscription requests.","PeriodicalId":296096,"journal":{"name":"2007 Wireless Telecommunications Symposium","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121589679","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
Speed and area analysis of memory based FFT processors in a FPGA FPGA中基于内存的FFT处理器的速度和面积分析
2007 Wireless Telecommunications Symposium Pub Date : 2007-04-26 DOI: 10.1109/WTS.2007.4563313
H. Yeh, Gerald Truong
{"title":"Speed and area analysis of memory based FFT processors in a FPGA","authors":"H. Yeh, Gerald Truong","doi":"10.1109/WTS.2007.4563313","DOIUrl":"https://doi.org/10.1109/WTS.2007.4563313","url":null,"abstract":"In this paper we present a trade-off analysis between hardware size and speed performance, measured in clock cycles, concerning fixed-point, memory-based FFT processors designed for FPGA. For OFDM systems using fixed-point FFT processors we also provide bit width requirements for different FFT sizes and digital modulation schemes including QPSK, 16-QAM, 64-QAM, 256-QAM. The information provided is based on six individual FFT processors which were modeled in software using the Java programming language, designed in HDL using Verilog and implemented in hardware using the Xilinx Spartan-3 FPGA.","PeriodicalId":296096,"journal":{"name":"2007 Wireless Telecommunications Symposium","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116334746","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
A low complexity and energy efficient dynamic channel allocation algorithm for multiuser OFDM 一种低复杂度、高能效的多用户OFDM动态信道分配算法
2007 Wireless Telecommunications Symposium Pub Date : 2007-04-26 DOI: 10.1109/WTS.2007.4563310
Adil El Bourichi, H. Yasuura
{"title":"A low complexity and energy efficient dynamic channel allocation algorithm for multiuser OFDM","authors":"Adil El Bourichi, H. Yasuura","doi":"10.1109/WTS.2007.4563310","DOIUrl":"https://doi.org/10.1109/WTS.2007.4563310","url":null,"abstract":"Algorithms for dynamic resource allocation in OFDM based wireless systems, known as Marge Adaptive optimization (MA), aim at reducing the total power consumption of the base station under individual minimum transmit rates for terminals. While it has been shown that using adaptive modulation increases the capacity of the wireless system, most MA algorithms may not be energy efficient when many mobile users are far from the base station because adaptive modulation decisions are left to the end of the algorithm after subcarrier allocation decisions have been already made. The low complexity channel allocation algorithm presented in this paper shows that a better use of adaptive modulation can result in better energy efficiency for both the base station and mobile users, while offering comparative performance with existing solutions.","PeriodicalId":296096,"journal":{"name":"2007 Wireless Telecommunications Symposium","volume":"197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123239174","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
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