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An Integrated Wideband Circularly-Polarized 60 GHz Array Antenna with Low Axial-Ratio 低轴比集成宽带圆极化60ghz阵列天线
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.25
J. Kot, N. Nikolic, O. Sevimli
{"title":"An Integrated Wideband Circularly-Polarized 60 GHz Array Antenna with Low Axial-Ratio","authors":"J. Kot, N. Nikolic, O. Sevimli","doi":"10.1109/AUSWIRELESS.2007.25","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.25","url":null,"abstract":"An integrated, circularly-polarized antenna comprising an annular slot and hybrid feed network fabricated on a standard liquid crystal polymer (LCP) substrate is described. The antenna is designed to operate in the WPAN band around 60 GHz. Modeled results for a single element and a 2x2 array are presented. The antenna bandwidth is sufficient to cover the entire WPAN band, and the array antenna has very low axial ratio, better than 0.3 dB across the band.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"1989 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127483421","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 60 GHz diversity LNA in 0.18ìm SiGe 0.18ìm SiGe中的60ghz分集LNA
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.3
J. Howarth, N. Weste
{"title":"A 60 GHz diversity LNA in 0.18ìm SiGe","authors":"J. Howarth, N. Weste","doi":"10.1109/AUSWIRELESS.2007.3","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.3","url":null,"abstract":"A combination low noise amplifier (LNA) and diversity switch (diversity LNA) is presented, allowing the switching between two spatially separated antennas to improve the received SNR in a multipath environment. This 60 GHz diversity LNA has a simulated gain of 14.3 dB and noise figure o f8.9 dB. It is suitable for diversity of reception implementation for a complete system-on-chip (SOC) in the 60 GHz band.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"428 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121884354","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
Variable Accuracy Sensing in Energy-Constrained Wireless Sensor Networks 能量受限无线传感器网络中的变精度传感
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.86
Xiaoxing Guo, M. Frater, M. Ryan
{"title":"Variable Accuracy Sensing in Energy-Constrained Wireless Sensor Networks","authors":"Xiaoxing Guo, M. Frater, M. Ryan","doi":"10.1109/AUSWIRELESS.2007.86","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.86","url":null,"abstract":"Networks comprising large numbers of low-cost, low-power and miniature wireless sensors are used to capture accurate and reliable information of the physical phenomena they are proximate to. However being operated by batteries of finite capacity, energy efficiency is still the major concern in the design of protocols in such networks. In this paper, we first introduce a new sensing scheme that allows variable accuracy to be specified by end users to achieve a trade-off between accuracy and energy efficiency. We then consider the connected active node selection for network lifetime prolongation problem under the proposed scheme by modifying the route weights in a pre-existing algorithm and introduce a new algorithm. The objective of this work is to allow trade-off between accuracy and energy efficiency in a sensor network and use only a subset of sensors to realize a given query, so that energy at inactive ones can be conserved. Extensive experiments show that the proposed sensing scheme and algorithms attain a longer network lifetime by selecting a subset of sensors to provide data at an accuracy determined by end users.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129826233","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 TR-UWB Receiver using Correlation in Frequency Domain 一种基于频域相关的TR-UWB接收机
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.18
Seonkeol Woo, Hoongee Yang, Sunghyun Yang, B. Kang
{"title":"A TR-UWB Receiver using Correlation in Frequency Domain","authors":"Seonkeol Woo, Hoongee Yang, Sunghyun Yang, B. Kang","doi":"10.1109/AUSWIRELESS.2007.18","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.18","url":null,"abstract":"This paper presents a new TR-UWB receiver using correlation in the frequency domain. Correlation is performed on the real and imaginary frequency-components of UWB pulses, respectively and correlation results are combined to enhance the output SNR. Analytical and numerical derivations are presented.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123734475","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
Estimation of Trust Metrics for MANET Using QoS Parameter and Source Routing Algorithms 基于QoS参数和源路由算法的MANET信任度量估计
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.31
D. Umuhoza, J. Agbinya, C. Omlin
{"title":"Estimation of Trust Metrics for MANET Using QoS Parameter and Source Routing Algorithms","authors":"D. Umuhoza, J. Agbinya, C. Omlin","doi":"10.1109/AUSWIRELESS.2007.31","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.31","url":null,"abstract":"Estimation of trust in ad-hoc networks is an inevitable basis for hybrid networks to inter-operate. The contributions in this paper provide a framework for estimating the trust between nodes in an ad hoc network based on quality of service parameters. Probabilities of transit time variation, deleted, multiplied and inserted packets, processing delays are used to estimate and update trust. Functions which facilitate this are provided and evaluated. It has been shown that only two end nodes need to be involved and thereby achieve reduced overhead. The framework proposed is applicable and useful to estimate trust in covert unobservable and anonymous communications.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115793079","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: 25
New Analytical Method to Investigate the Effect of Normalized Doppler rate on the Capacity of MIMO channels Using Karhunen-Loeve Expansion 用Karhunen-Loeve展开研究归一化多普勒速率对MIMO信道容量影响的新分析方法
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.49
N. Rahimian, A. Falahati
{"title":"New Analytical Method to Investigate the Effect of Normalized Doppler rate on the Capacity of MIMO channels Using Karhunen-Loeve Expansion","authors":"N. Rahimian, A. Falahati","doi":"10.1109/AUSWIRELESS.2007.49","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.49","url":null,"abstract":"In this paper the effect of normalized Doppler rate fN on the capacity of MIMO channels with any arbitrary fading spectrum in fast fading environment is investigated. A channel with land mobile fading spectrum with the autocorrelation function introduced by Jake is considered for simulations. Normalized Doppler rate fN is actually the product of the actual Doppler rate fD and the duration of the transmitted symbol T. The discrete version of Karhunen-Loeve expansion is utilized to produce a complex Gaussian process in which each of its instant values is correlated to past values based on an arbitrary autocorrelation function. This expansion is also used to expand the channel matrix with each entry being a complex Gaussian process. This is a computationally efficient technique for statistical simulations to evaluate the ergodic capacity and can be used to avoid lengthy numerical computations.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"363 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114774432","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
Reliability Issues in a SIP based Location Tracking Architecture 基于SIP的位置跟踪体系结构中的可靠性问题
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.66
Z. Shah, R. Malaney
{"title":"Reliability Issues in a SIP based Location Tracking Architecture","authors":"Z. Shah, R. Malaney","doi":"10.1109/AUSWIRELESS.2007.66","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.66","url":null,"abstract":"In this work reliability issues regarding a new SIP-based architecture for location tracking are investigated. This new architecture works across different positioning technologies (particle filters and GPS) and provides optimal position tracking in real time for an outdoor mobile user. A new adaptive SIP retransmission timer is proposed that is designed specifically for real time location tracking in an outdoor environment. This new retransmission timer is aligned with the motion model of the mobile user. We extend the architecture to allow other location based network information, such as that residing in quality of service (QoS) aware servers, to be seamlessly incorporated. The architecture we propose here, builds on our already deployed GPS-assisted particle filter tracking algorithms and our position-based QoS presence system.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134148046","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
Multi-hop Networking With Space Reuse in IEEE 802.15.3 UWB WPANs IEEE 802.15.3 UWB wpan中空间复用的多跳网络
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.48
Jung-Shian Li, Hung-Cheng Kao, Sen-Yo Cheng
{"title":"Multi-hop Networking With Space Reuse in IEEE 802.15.3 UWB WPANs","authors":"Jung-Shian Li, Hung-Cheng Kao, Sen-Yo Cheng","doi":"10.1109/AUSWIRELESS.2007.48","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.48","url":null,"abstract":"Multi-hop extension is fulfilled by constructing child or neighbor piconets in IEEE 802.15.3 standard. This approach does not consider the multi-channel capability in the physical layer. The scalability of the design is limited. This paper discusses how to construct a multi-piconet network and improve the performance of UWB multi-hop WPANs in the existing 802.15.3 standard based on a bridge device (BDEV). BDEV is a member of all interconnected piconets. The coverage extension by BDEVs follows the 802.15.3 standard and it takes benefit from the space reuse. BDEV with only one network interface is cheap and simple to extend a flexible construction of ad hoc networking of WPANs. Furthermore, a distributed scheduling scheme on BDEV is proposed to improve the delay performance. Through detailed simulations, the proposed distributed BDEV scheduling scheme are shown to be effective to extend network coverage.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127359187","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
Evaluate Voting System Reliability Using the Monte Carlo simulation and Artificial Neural Network 用蒙特卡罗模拟和人工神经网络评价投票系统的可靠性
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.32
W. Yeh, Chia-Yen Yu, Chien-Hsing Lin
{"title":"Evaluate Voting System Reliability Using the Monte Carlo simulation and Artificial Neural Network","authors":"W. Yeh, Chia-Yen Yu, Chien-Hsing Lin","doi":"10.1109/AUSWIRELESS.2007.32","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.32","url":null,"abstract":"The threshold voting system (TVS) is a generalization of k-out-of-n systems. It is widely used in human organization systems, technical decision-making systems, fault-tolerant systems, mutual exclusion in distributed systems, and replicated databases. The TVS comprises of n units, each of which provides a binary decision (0 or 1), or abstains from voting. The system output is 1 if the cumulative weight of all 1-opting units is at least a pre-specified fraction tau of the cumulative weight of all non-abstaining units. Otherwise, the system output is 0. In this study, an intuitive Monte Carlo simulation (MCS) was first developed to estimate the TVS reliability value. Then a new artificial neural network (called MCS-ANN) and a response surface methodology (called MCS-RSM) with the box-Behnken design (BBD) were created to find the approximated reliability function from the reliability estimated by MCS. The effectiveness of these two approaches were also compared using a benchmark TVS.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128990711","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: 4
A Study of Different Angles for Higher Order Rotation Spreading Matrix for BSOFDM in UWB Channels 超宽带信道中BSOFDM高阶旋转扩频矩阵不同角度的研究
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.13
I. Raad, Xiaojing Huang, R. Raad
{"title":"A Study of Different Angles for Higher Order Rotation Spreading Matrix for BSOFDM in UWB Channels","authors":"I. Raad, Xiaojing Huang, R. Raad","doi":"10.1109/AUSWIRELESS.2007.13","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.13","url":null,"abstract":"This paper presents a study into different angles for higher order rotation spreading matrix developed for BSOFDM. It was shown previously that for block size M = 2 that the angle a = pi/3 achieved the best result in terms of BER in UWB channels. It was discovered that this was no longer the case when the higher order rotation spreading matrix was used for larger M sized blocks and that other angles produced better results which proves that the rotation spreading matrix advantage over existing spreading matrices such as the Hadamard is its flexibility to be adapted to different communication systems.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123960328","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
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