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Achieving Full Multiplexing Gain of MIMO Systems Using Adaptive Modulation and Coding 利用自适应调制和编码实现MIMO系统的全复用增益
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.20
Zhendong Zhou, B. Vucetic, Zhuo Chen
{"title":"Achieving Full Multiplexing Gain of MIMO Systems Using Adaptive Modulation and Coding","authors":"Zhendong Zhou, B. Vucetic, Zhuo Chen","doi":"10.1109/AUSWIRELESS.2007.20","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.20","url":null,"abstract":"One of the advantages of multiple-input multiple-output (MIMO) systems is the multiplexing gain over single-input single-output (SISO) systems. We consider adaptive modulation and coding (AMC) as a practical technique in achieving the full multiplexing gain of MIMO systems. The multiplexing gain of AMC MIMO systems is analyzed quantitatively, and a practical way of predicting the multiplexing gain of a generic AMC MIMO system is presented.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"80 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":"114644033","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
The Impact of Different Radio Propagation Models for Mobile Ad hoc NETworks (MANET) in Urban Area Environment 城市环境下不同无线电传播模式对移动自组网(MANET)的影响
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.80
I. Eltahir
{"title":"The Impact of Different Radio Propagation Models for Mobile Ad hoc NETworks (MANET) in Urban Area Environment","authors":"I. Eltahir","doi":"10.1109/AUSWIRELESS.2007.80","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.80","url":null,"abstract":"Network simulation tools are frequently used to analyze performance of MANET protocols and applications. They commonly offer only simple radio propagation models that neglect obstacles of a propagation environment. The radio wave propagation model has a strong impact on the results of the simulation run. This work shows different radio propagation models into a simulation tool. The model is based on data of the simulation area in urban area. Consequently, we obtain different performance evaluation results. This paper gives insights on the effect of different propagation models for MANETs in indoor and outdoor environments and presents the parameters and the results of simulating using network simulator.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"11 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":"127211515","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: 96
Efficient User Selection Algorithms for Wireless Broadcast Channels 无线广播信道的高效用户选择算法
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.29
A. Khan, R. Vesilo, I. Collings
{"title":"Efficient User Selection Algorithms for Wireless Broadcast Channels","authors":"A. Khan, R. Vesilo, I. Collings","doi":"10.1109/AUSWIRELESS.2007.29","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.29","url":null,"abstract":"This paper considers wireless broadcast systems with multi-antenna base stations. Preceding at the transmitter reduces interference between users allowing independent data streams to be sent to multiple users simultaneously. With typically more users than transmit antennas, efficient selection of user subsets is important. The paper compares the effectiveness of several user selection algorithms and identifies situations where they are suboptimal. The impact of zero-forcing (ZF) and dirty paper coding (DPC) precoding are considered. A modification to two current algorithms is proposed that reduces computational time while retaining effectiveness. Simulation is used to assess the modifications and suggest methods of setting parameters. The paper examines the variability of allocated data rates and shows how it affects the performance of weighted alpha rule schedulers, which trade-off efficiency with fairness. It is shown that reducing the variability of allocated rates can have a significant reduction on mean scheduler queue sizes.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"4 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":"125307154","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: 11
A Synchronous Receiver for a DS-CDMA downlink system using FIR based SWLMS Adaptive Filter 基于FIR的SWLMS自适应滤波器的DS-CDMA下行系统同步接收机
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.16
Krishna K Ramakrishnan
{"title":"A Synchronous Receiver for a DS-CDMA downlink system using FIR based SWLMS Adaptive Filter","authors":"Krishna K Ramakrishnan","doi":"10.1109/AUSWIRELESS.2007.16","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.16","url":null,"abstract":"In this paper, a FIR based synchronous DS/CDMA receiver is proposed, employing sliding-window LMS algorithm. This receiver has the capacity to suppress the ISI (inter symbol interference) and combat multipath fading experiencing in both static and dynamic multipath environment. This paper emphasizes the importance of spread spectrum technique (CDMA) and the adaptive algorithms and its performance comparisons. The main objective of this paper is to implement, analyze and compare different FIR based adaptive algorithms like NLMS, DRLMS with respect to SWLMS for ISI equalization. The bit- error rate and the output SNR will be considered as the main performance criteria. Attention will be also given to the computational complexity of the implemented algorithms.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"1 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":"122584592","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
Throughput Performance of Saturated 802.11g Networks 饱和802.11g网络的吞吐量性能
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.82
N. Dao, R. Malaney
{"title":"Throughput Performance of Saturated 802.11g Networks","authors":"N. Dao, R. Malaney","doi":"10.1109/AUSWIRELESS.2007.82","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.82","url":null,"abstract":"In this paper we evaluate the throughput properties of 802.11g networks in the saturated limit. Using a modification to existing analytical models we show how our new results solve previously reported dicrepancies between analytical throughput predictions and measured throughputs. We investigate the performance of saturated 802.11 g networks as a function of various 802.11g PHY parameters, including the transmission rate of ACKframes, the slot size, the use of EIFS (extended inter-frame spacing) and the total PCLP (physical convergence layer protocol) overhead. We also investigate the throughput performance as a function of important MAC layer parameters. An interesting result we find is the how the predicted throughput depends on the Contention Window value and the number of stations. The results reported here will be of value to the ongoing study of multimedia application deployments over high PHY data rate 802.11 g networks.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"1 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":"129576283","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: 14
A Residual and Sampling Frequency Offset Estimation Scheme for Multiband OFDM 一种多频带OFDM残差和采样频偏估计方法
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.11
J. Kim, Hyun Yang, Eu-Suk Shim, Hyoung-Kyu Song, Y. You
{"title":"A Residual and Sampling Frequency Offset Estimation Scheme for Multiband OFDM","authors":"J. Kim, Hyun Yang, Eu-Suk Shim, Hyoung-Kyu Song, Y. You","doi":"10.1109/AUSWIRELESS.2007.11","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.11","url":null,"abstract":"In this paper, a residual frequency offset (RFO) and sampling frequency offset (SFO) estimator is proposed for ultra- wideband multi-band orthogonal frequency division multiplexing (UWB MB-OFDM) systems. The proposed scheme uses a time-domain spreaded data samples which is provided in MB-OFDM system. To demonstrate the efficiency of the proposed RFO and SFO estimator, comparisons are made with other existing estimator.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"1 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":"128467962","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
MAGNA: Middleware for dynamic and resource constrained sensor networks MAGNA:动态和资源受限传感器网络的中间件
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.43
S. Sinha, Z. Chaczko
{"title":"MAGNA: Middleware for dynamic and resource constrained sensor networks","authors":"S. Sinha, Z. Chaczko","doi":"10.1109/AUSWIRELESS.2007.43","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.43","url":null,"abstract":"Traditionally sensor networks have been typically enterprise architecture driven, where a dedicated server is used to collect data and record in a database for analysis and historical reference. While modern day computing capabilities allow drilling through megabytes of information, it is not always the most cost- effective solution. The other alternative is the use of smart sensors, whereby each node is capable of routing data to any destination using a HTTP server. This not only escalates the cost of each node but also imposes severe strain on the network - thus necessitating developers and architects to evaluate the impact of swarming and \"lazy routing\". The notion of the proposed middleware solution (MAGNA) is to bring about context-based processing and intelligent data capture and/or filter right up to the sensor nodes through the use of powerful \"sub-net\" controllers. The paper will explore the application of MAGNA as a platform capable of offering ambient intelligence in a typical sensor network environment, integrating everyday appliances and our life-style together. In doing so, two primary methodologies will be discussed on which MAGNA is essentially based, namely the soft systems methodology and the banking model approach.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"42 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":"124139730","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
Interactive Protection System for Operator Training Simulator Using New Wavelet Techniques 基于新小波技术的操作员训练模拟器交互保护系统
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.40
M. Eissa, Z. Chaczko, E. Alrahali
{"title":"Interactive Protection System for Operator Training Simulator Using New Wavelet Techniques","authors":"M. Eissa, Z. Chaczko, E. Alrahali","doi":"10.1109/AUSWIRELESS.2007.40","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.40","url":null,"abstract":"An increase in complexity of relays and power systems makes the relay settings and the process of coordination quite difficult. The changes of operating conditions in power systems also adversely affect the installed relays. There is a strong requirement to avoid protection relay maloperation and to ensure continuing optimal relay coordination and operation. It is rather difficult to determine which of the protective relays will operate as specified or whether the coordination of the relays is maintained due to complexity of the system. This paper introduces a reliable and secure interactive framework system for investigation, calculation of relay settings and relay coordination using wavelet based techniques. The interactive system allows an engineer in the control room to assign the location, the type of fault and the relay data set pattern; then the operating time of the protective devices is generated. The system framework introduces a dynamic, interactive transient of the relay models for the power system.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"38 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":"127887935","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
Mobile Network Monitoring Information System 移动网络监控信息系统
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.47
Rodrigo M. S. Gonçalves, B.M.G. Miranda, F. Cercas
{"title":"Mobile Network Monitoring Information System","authors":"Rodrigo M. S. Gonçalves, B.M.G. Miranda, F. Cercas","doi":"10.1109/AUSWIRELESS.2007.47","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.47","url":null,"abstract":"This article presents a model to implement an information system to monitor mobile networks using key performance indicators (KPIs). The proposed model encloses not only the KPI calculations but the translation, importing and presentation of data. It also addresses more advanced topics such as system configuration, node dependencies and routing. A description of the system's implementation is also presented, from two perspectives: high-level components and technology-related issues. The paper finishes with the presentation of a system application: monitoring a KPI using a data plot generated by the system.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"24 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":"125449192","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
QoS Performance Analysis of Multi-Radio Multi-Hop Wi-Fi Chain Network 多无线多跳Wi-Fi链网络的QoS性能分析
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.64
D. Chieng, S.W. Tan, R. Rahim, A. Ting
{"title":"QoS Performance Analysis of Multi-Radio Multi-Hop Wi-Fi Chain Network","authors":"D. Chieng, S.W. Tan, R. Rahim, A. Ting","doi":"10.1109/AUSWIRELESS.2007.64","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.64","url":null,"abstract":"Wi-Fi mesh networking (WMN) has emerged as a promising technology for providing cost-effective ubiquitous broadband coverage. Despite the many advantages that this technology can offer, various questions still remain on its performance. In this paper, we analyze the performance of WMN basic building block, i.e. the multi-hop chain network using the emerging multi-radio system. Quality of service (QoS) performances of two popular multimedia applications; Voice/UDP and Web/TCP with varying client densities, hop counts, etc, are investigated.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"16 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":"134369331","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
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