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Selective Detection for MIMO-OFDM Transmission MIMO-OFDM传输的选择性检测
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.70
H. Suzuki, I. Collings, G. Lam, M. Hedley
{"title":"Selective Detection for MIMO-OFDM Transmission","authors":"H. Suzuki, I. Collings, G. Lam, M. Hedley","doi":"10.1109/AUSWIRELESS.2007.70","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.70","url":null,"abstract":"We present a novel technique for the detection of spatially multiplexed transmitted symbols in uncoded multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system. The method, termed selective detection, observes errors caused by a simple zero- forcing (ZF) on different OFDM sub-carriers, and selectively performs list sphere detection (LSD) on sub-carriers with larger errors. Compared with the full-complexity LSD, the proposed algorithms could significantly reduce the receiver complexity at a small signal-to-noise ratio (SNR) loss. For example, simulation results for a MIMO-OFDM system using four transmitters and four receivers with 16 quadrature amplitude modulation (16-QAM) show that 93% of SNR gain that can be achieved by the use of LSD over ZF can be realised if only 33% of sub-carriers are intelligently selected for LSD.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"229 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":"132231551","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
An Open IMS Testbed for exploring Wireless Service Evolution and Network Architecture Evolution towards SAE and LTE 面向SAE和LTE的无线业务演进和网络架构演进的开放式IMS测试平台
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.26
N. Blum, F.C. de Gouveia, T. Magedanz
{"title":"An Open IMS Testbed for exploring Wireless Service Evolution and Network Architecture Evolution towards SAE and LTE","authors":"N. Blum, F.C. de Gouveia, T. Magedanz","doi":"10.1109/AUSWIRELESS.2007.26","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.26","url":null,"abstract":"Modern telecommunication networks and classical roles of operators are subject to fundamental changes. Standardization bodies and Industry are specifying and integrating next generation network (NGN) infrastructures and NGN services based on an all IP paradigm. The Internet Engineering Task Force (IETF), European Telecommunications Standards Institute (ETSI), Third Generation Partnership Project (3GPP), 3GPP2 and Open Mobile Alliance (OMA) are working on technological issues to enable services using Internet technology and service orientated architectures (SOA). Furthermore, first thoughts on the architectural and bearer evolution of NGN is taking place under the notion of long term evolution (LTE) and system architecture evolution (SAE). This paper reports about our approach of extending the existing IP multimedia subsystem (IMS) Playground @ FOKUS towards a LTE/SAE testbed and two prototypic services, a single network agnostic voicemail application and a 3G circuit-switched to packet-switched handover scenario as a proof-of-concept for the environment.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"134 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":"132312440","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: 8
Millimetre Wave 3D Imaging for Industrial Applications 工业应用的毫米波3D成像
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.45
G. Brooker, R. Hennessey, M. Bishop, C. Lobsey, A. Maclean
{"title":"Millimetre Wave 3D Imaging for Industrial Applications","authors":"G. Brooker, R. Hennessey, M. Bishop, C. Lobsey, A. Maclean","doi":"10.1109/AUSWIRELESS.2007.45","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.45","url":null,"abstract":"Within the next few years, improvements in graphic rendering and the application of millimetre wave radar technology will, together, allow operators of industrial processes in poor visibility environments to control their machines remotely. At the ACFR, we have been developing the 3D radar systems and displays to make this a reality in the mining industry. This paper discusses the principles involved in generating such images, and gives a number of examples of systems that have been implemented in the field.","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":"123116720","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
A Novel Proportional Fair Scheduling Algorithm for HSDPA in UMTS Networks 一种新的UMTS网络HSDPA比例公平调度算法
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.9
A. Haider, R. Harris
{"title":"A Novel Proportional Fair Scheduling Algorithm for HSDPA in UMTS Networks","authors":"A. Haider, R. Harris","doi":"10.1109/AUSWIRELESS.2007.9","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.9","url":null,"abstract":"A utility function based perspective of packet scheduling in HSDPA is described and a new hybrid proportional fair scheduling algorithm has been developed. This algorithm employs a ratio of the instantaneous channel quality indicator to its mean value and an exponentially weighted moving average of the data rate to be transmitted at the base station (Node-B). Performance of the new algorithm has been compared with round robin, maximum carrier to interference ratio and proportional fair throughput schemes, under pedestrian A, vehicular A and vehicular B environments. The new algorithm has shown higher levels of total cell throughput than round robin and proportional fair throughput schedulers. Furthermore, it is shown that it has good fairness properties that are comparable with the round robin scheduler, and it exhibits low values of the mean end-to-end packet delay.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"20 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":"114589647","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: 41
Proactive Cellular Network Faults Prediction Through Mobile Intelligent Agent Technology 基于移动智能代理技术的主动蜂窝网络故障预测
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.62
O. P. Kogeda, J. Agbinya
{"title":"Proactive Cellular Network Faults Prediction Through Mobile Intelligent Agent Technology","authors":"O. P. Kogeda, J. Agbinya","doi":"10.1109/AUSWIRELESS.2007.62","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.62","url":null,"abstract":"Cellular network faults prediction models using mobile intelligent agent are presented in this paper. Cellular networks are uncertain and dynamic in their behaviours and therefore we use different artificial intelligent techniques to develop platform independent, autonomous, reasoning and robust agents that can report on any unforeseen anomaly within the cellular network service provider. The specific design and implementation is done using Java agent development framework (JADE). The partial results obtained from the experiments conducted are presented and discussed in this paper.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"36 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":"114486550","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
Risk and Vulnerability Assessment of Secure Autonomic Communication Networks 安全自主通信网络的风险与脆弱性评估
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.67
F. Chiang, J. Agbinya, R. Braun
{"title":"Risk and Vulnerability Assessment of Secure Autonomic Communication Networks","authors":"F. Chiang, J. Agbinya, R. Braun","doi":"10.1109/AUSWIRELESS.2007.67","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.67","url":null,"abstract":"Risk and vulnerability analysis (RVA) aims at identifying the weaknesses of the networks that may be exploited to compromise the normal functions, such as service deployment, file system access permissions, applications activations and so on. Autonomic communication networks (ACNs) are recently proposed as business-objective driven high-level self-managed telecommunication networks with the adaptation capability to cope with increasing dynamics. Adaptation capability termed as adaptability becomes the premise of realizing thorough autonomy. As a theoretic foundation, we firstly propose an innovative object-oriented management information base (0:MIB). Secondly, a new information-theoretic security awareness strategy inspired from human immune system is proposed to reconfigure file access right, which has a direct relation with adaptability. The experimental results validate this methodology and find out a statistical bound for operators to set a vulnerability level of warning in practice.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"21 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":"130131887","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
Load-Pull Analysis of Outphasing Class-E Power Amplifier 缺相e类功率放大器的负载-拉力分析
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.42
K. Tom, V. Bassoo, M. Faulkner, T. Lejon
{"title":"Load-Pull Analysis of Outphasing Class-E Power Amplifier","authors":"K. Tom, V. Bassoo, M. Faulkner, T. Lejon","doi":"10.1109/AUSWIRELESS.2007.42","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.42","url":null,"abstract":"In this paper, we discuss a load-pull analysis technique to charaterize the efficiency performance of class-E amplifier in an outphasing power combining scheme. Class-E amplifier has the potential to deliver high efficiency. Class-E amplifier is not an ideal current or voltage source as is required for the traditional analysis of outphasing structures. It requires a phase modulated input signal and has a non-linear transfer characteristic which is a function of load impedance. Here we define an operating load locus based on the load-pull analysis which can be used to predict the non-linear transfer function, efficiency, output power, input drive phase and many other factors associated with the outphasing class-E amplifier. This scheme could also be used to characterize any amplifier class in an outphasing structure.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"93 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":"132022862","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: 8
Performance of MB-OFDM UWB Systems with Extra Diversity 具有额外分集的MB-OFDM UWB系统的性能
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.58
J. Kim, Eu-Suk Shim, Hyun Yang, Hyoung-Kyu Song, Y. You
{"title":"Performance of MB-OFDM UWB Systems with Extra Diversity","authors":"J. Kim, Eu-Suk Shim, Hyun Yang, Hyoung-Kyu Song, Y. You","doi":"10.1109/AUSWIRELESS.2007.58","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.58","url":null,"abstract":"This paper presents the performance of ultra-wideband multi-band orthogonal frequency division multiplexing (UWB MB-OFDM) systems with extra diversity. To fully obtain diversity gain in the current MB-OFDM system when time-domain spreading (TDS) and frequency-domain spreading (FDS) are adopted, two consecutive OFDM symbols are designed to be cyclic shifted each other. Simulation results show that the MB-OFDM using additional frequency diversity outperforms conventional MB-OFDM.","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":"125368480","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
Improved Pilot Symbol-Assisted Estimation of Integer Frequency Offset for OFDM 改进的导频符号辅助OFDM整数频偏估计
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.38
Eu-Suk Shim, Hyun Yang, J. Kim, Hyoung-Kyu Song
{"title":"Improved Pilot Symbol-Assisted Estimation of Integer Frequency Offset for OFDM","authors":"Eu-Suk Shim, Hyun Yang, J. Kim, Hyoung-Kyu Song","doi":"10.1109/AUSWIRELESS.2007.38","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.38","url":null,"abstract":"This paper deals with a simple way of estimating the integer frequency offset (IFO) of orthogonal frequency division multiplexing (OFDM) system. By modifying the conventional maximum likelihood (ML) estimator to have two-stage estimation strategy, the IFO estimator is derived. Simulations indicate that the proposed IFO estimator works robustly when compared to ML estimator.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"60 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":"126788825","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
Optimal Adaptive Hyperbolic Companding for OFDM OFDM的最优自适应双曲扩展
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.52
D. Lowe, Xiaojing Huang
{"title":"Optimal Adaptive Hyperbolic Companding for OFDM","authors":"D. Lowe, Xiaojing Huang","doi":"10.1109/AUSWIRELESS.2007.52","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.52","url":null,"abstract":"In this paper, we derive and analyze a companding algorithm based on the hyperbolic tangent and inverse hyperbolic tangent functions for use in orthogonal frequency division multiplexing (OFDM) transceivers. Probability density functions (PDFs) that approximate the transmitted and received OFDM signals in the presence of additive white Gaussian noise (AWGN) are derived and used to analyze the degree of companding relative to the signal-to-noise ratio (SNR) and clipping level. A set of optimal companding linearity coefficients for the multi-band OFDM (MB-OFDM) ultra-wideband (UWB) standard are presented.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"28 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":"126151691","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: 22
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