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Socio-inspired Design Models for Software Systems Infrastructure 软件系统基础设施的社会启发设计模型
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.73
M. Caroly, Z. Chaczko
{"title":"Socio-inspired Design Models for Software Systems Infrastructure","authors":"M. Caroly, Z. Chaczko","doi":"10.1109/AUSWIRELESS.2007.73","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.73","url":null,"abstract":"This paper outlines our charitable model, the technical challenges that drove the concept behind this model and the rationale behind its design. Social models such as the benefactor/beneficiary model of multi-agent distributed storage middlewarecan be successfully applied to many areas as a means of automating a wide variety of resource distribution challenges in both traditional and future distributed systems. An environment populated with many redundant components can benefit from a charitable entity, allowing wasted resources to be efficiently distributed to the network on a voluntary manner.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"3 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":"132249996","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
W-Band GaAs Schottky Diode MMIC mixers for Multi-Gigabit Wireless Communications 用于多千兆无线通信的w波段GaAs肖特基二极管MMIC混频器
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.88
V. Dyadyuk, J. Archer, L. Stokes
{"title":"W-Band GaAs Schottky Diode MMIC mixers for Multi-Gigabit Wireless Communications","authors":"V. Dyadyuk, J. Archer, L. Stokes","doi":"10.1109/AUSWIRELESS.2007.88","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.88","url":null,"abstract":"This paper describes the design and measured performance of wideband sub-harmonically pumped mixers suitable for the millimeter-wave multi-gigabit wireless communication systems. It represents the first development of W-band mixers using a commercial Schottky diode process published so far.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"295 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":"116096475","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
Power Allocation for MMSE Feedback Precoder on Multi-Antenna Broadcast Channels 多天线广播信道中MMSE反馈预编码器的功率分配
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.59
Kuan Lun Huang, Jinhong Yuan
{"title":"Power Allocation for MMSE Feedback Precoder on Multi-Antenna Broadcast Channels","authors":"Kuan Lun Huang, Jinhong Yuan","doi":"10.1109/AUSWIRELESS.2007.59","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.59","url":null,"abstract":"In this paper, we study the minimum-mean-squared- error feedback precoder (MMSE-FBP) for the multiple-input multiple-output (MIMO) Gaussian broadcast channel (BC). It has recently been shown that MMSE-FBP can achieve higher sum capacity than zero-forcing and MMSE precoders, however, it still leaves a gap to the MIMO BC sum capacity. We propose two new schemes involving dynamic power allocation among users. These new schemes build on top of the MMSE-FBP structure and are able to achieve the MIMO BC sum capacity. We also discuss how our new schemes compare with an existing one and demonstrate how the transmitter and receivers can be simplified if the system is operating in mid to high SNR region.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"37 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":"121992446","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
Sensors Localisation Methods in the COSA Framework COSA框架下的传感器定位方法
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.71
Z. Chaczko, J. Nikodem, R. Klempous, M. Nikodem
{"title":"Sensors Localisation Methods in the COSA Framework","authors":"Z. Chaczko, J. Nikodem, R. Klempous, M. Nikodem","doi":"10.1109/AUSWIRELESS.2007.71","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.71","url":null,"abstract":"This paper reports on experiences in simulating distributed localisation in a cooperative oriented sensors actuators network. We built and tested three different modules of a simulator: creation of constellations, node position approximation and modeling of error propagation in the network. In our approach we modelled neighbourhood as a local abstraction moderated by two global aspects: average position inaccuracy value and error propagation immunity.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"57 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":"124064620","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
Complementary Channel Estimation and Synchronization for OFDM OFDM互补信道估计与同步
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.28
D. Lowe, Xiaojing Huang
{"title":"Complementary Channel Estimation and Synchronization for OFDM","authors":"D. Lowe, Xiaojing Huang","doi":"10.1109/AUSWIRELESS.2007.28","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.28","url":null,"abstract":"In this paper, we present a new type of packet preamble for orthogonal frequency division multiplexing (OFDM) systems that is based on a complementary sequence pair. It is shown how this approach permits a receiver to dynamically choose between frequency-domain equalization (FDE) and time-domain equalization (TDE). With FDE offering a low-complexity zero-forcing (ZF) equalization and TDE facilitating easy minimum mean square error (MMSE) estimation, it is concluded that a spectrally-flattened complementary sequence pair offers an outstanding combination of flexibility and performance.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"27 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":"129892712","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
Performance Analysis of Adaptive Modulation System with Optimal Turbo Coded V-BLAST Technique corresponding to each MIMO 各MIMO对应的最优Turbo编码V-BLAST自适应调制系统性能分析
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.53
Kyunghwan Lee, Sangjin Ryoo, Kwangwook Choi, Changhyeon Chae, Daewon Choi, Myeungseuk Kang, M. Kang, T. Jung, I. Hwang, Cheolsung Kim
{"title":"Performance Analysis of Adaptive Modulation System with Optimal Turbo Coded V-BLAST Technique corresponding to each MIMO","authors":"Kyunghwan Lee, Sangjin Ryoo, Kwangwook Choi, Changhyeon Chae, Daewon Choi, Myeungseuk Kang, M. Kang, T. Jung, I. Hwang, Cheolsung Kim","doi":"10.1109/AUSWIRELESS.2007.53","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.53","url":null,"abstract":"In this paper, we propose and analyze an adaptive modulation system with optimal turbo coded V- BLAST (vertical-bell-lab layered space-time) technique that adopts the extrinsic information from MAP (maximum a posteriori) decoder with iterative decoding as a priori probability in two decoding procedures of V-BLAST scheme; the ordering and the slicing. Also, we consider and compare The adaptive modulation system using conventional turbo coded V-BLAST technique that is simply combined V-BLAST scheme with turbo coding scheme and that is decoded by the ML(maximum likelihood) decoding algorithm. In addition, we apply MIMO (multiple input multiple output) schemes to the systems for more performance improvement. The result indicates that the proposed systems achieve a better throughput performance than the conventional systems in the whole SNR range. And in terms of the throughput performance, the suggested system is close proximity to the conventional system using the ML decoding algorithm. In addition, the simulation result shows that the maximum throughput improvement in each MIMO scheme is respectively about 350 kbps, 460 kbps, and 740 kbps. It is suggested that the effect of the proposed decoding algorithm accordingly gets higher as the number of system antenna increases.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"52 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":"127606992","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
Pre-Coordination Mechanism for Fast Handover in WiMAX Networks WiMAX网络快速切换的预协调机制
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.60
Jenhui Chen, Chih-Chieh Wang, Jiann-Der Lee
{"title":"Pre-Coordination Mechanism for Fast Handover in WiMAX Networks","authors":"Jenhui Chen, Chih-Chieh Wang, Jiann-Der Lee","doi":"10.1109/AUSWIRELESS.2007.60","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.60","url":null,"abstract":"The most challenging research issue of investigating broadband wireless access (BWA) technologies is how to support mobility in WiMAX networks smoothly and seamlessly. It is essential that providing continuous services of multimedia streaming data when a mobile subscriber station (MSS) is across a boundary of a serving area to another one. Although the IEEE 802.16e standard is proposed to tackle this difficult problem, the disruption time (DT) of handover is still too long to overcome the maximum delay time of real-time services. To deal with this problem, this paper proposes a pre-coordination mechanism (PCM) for supporting fast handover in WiMAX networks. This goal is achieved by measuring the distance between the BS and the MSS and predicting the time of handover occurs, and thus pre-allocating available resources for handover usages. Simulation results show that the enhanced DT of handover can achieve approximately to 11 milliseconds. The proposed mechanism is fully compatible with the IEEE 802.16e standard.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"19 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120847879","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: 34
Row-splitting design of Low-Density Parity-Check Codes for Gbps wireless transmission Gbps无线传输低密度校验码的分行设计
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.69
Jong-Ee Oh, Minho Cheong, Seokhyun Yoon, Sok-Kyu Lee
{"title":"Row-splitting design of Low-Density Parity-Check Codes for Gbps wireless transmission","authors":"Jong-Ee Oh, Minho Cheong, Seokhyun Yoon, Sok-Kyu Lee","doi":"10.1109/AUSWIRELESS.2007.69","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.69","url":null,"abstract":"In this paper, we propose a design methodology of low-density parity check (LDPC) code for very high speed wireless transmission. To support various code rates with reasonable hardware a row-splitting/combining method is employed in conjunction with shortening. In row-splitting approach, a parity check matrix of a high rate mother LDPC code, saying rate 4/5, is designed first and then successively row-split the mother matrix to obtain lower rate codes. Shortening provides us another degree of freedom for rate and frame length flexibility for concatenation with MIMO system. The code performance is investigated in terms of frame error rate and compared with those of the LDPC code proposed in IEEE 802.16e standard.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"169 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":"121067869","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
GPS Modeling in Frequency Domain GPS频域建模
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.36
Xiaoying Kong
{"title":"GPS Modeling in Frequency Domain","authors":"Xiaoying Kong","doi":"10.1109/AUSWIRELESS.2007.36","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.36","url":null,"abstract":"Although DGPS provides positioning information with high precision, when DGPS is unavailable in some situations, stand-alone GPS has to be used in vehicle navigation. The accuracy of standard GPS is low due to position measurement errors. This paper presents a frequency domain modeling approach to model GPS errors and increase GPS positioning accuracy. This approach models GPS errors using shaping filter. External sensors are employed to reduce GPS errors. This paper also presents an approach to select external sensors to meet the quality requirements of positioning system.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"12 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":"121526454","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: 12
Performance Comparison of Reactive Routing Protocols for Hybrid Wireless Mesh Networks 混合无线网状网络响应路由协议的性能比较
The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007) Pub Date : 2007-08-27 DOI: 10.1109/AUSWIRELESS.2007.55
S. Khan, A. Pirzada, M. Portmann
{"title":"Performance Comparison of Reactive Routing Protocols for Hybrid Wireless Mesh Networks","authors":"S. Khan, A. Pirzada, M. Portmann","doi":"10.1109/AUSWIRELESS.2007.55","DOIUrl":"https://doi.org/10.1109/AUSWIRELESS.2007.55","url":null,"abstract":"Wireless mesh networks have recently gained a lot of popularity due to their rapid deployment and instant communication capabilities. These networks comprise of somewhat static multi-radio Mesh Routers, which essentially provide connectivity between the mobile single-radio mesh clients. Special routing protocols are employed, which facilitate routing between the mesh routers as well as between the mesh routers and the mobile clients. AODV is a well known routing protocol that can discover routes on-the-fly in a mobile environment. The protocol is highly scalable and can support thousands of nodes making it an ideal protocol for wireless mesh networks. However, as the protocol was actually developed for single-radio nodes, it frequently lacks the ability to exploit the potential offered by the mesh routers and, hence, sub-optimal routing takes place in a mesh environment. This paper gives an overview of four variants of the AODV routing protocol that can potentially be used for mesh formation. In order to determine their aptness for application to hybrid wireless mesh networks, this paper presents their characteristics and functionality, and then provides a comparison and discussion of their respective merits and drawbacks.","PeriodicalId":312921,"journal":{"name":"The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless 2007)","volume":"78 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":"131028601","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: 19
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