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2009 International Conference on Wireless Networks and Information Systems最新文献

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Hybrid Indoor Location Estimation System Using Image Processing and WiFi Strength 基于图像处理和WiFi强度的混合室内位置估计系统
2009 International Conference on Wireless Networks and Information Systems Pub Date : 2009-12-28 DOI: 10.1109/WNIS.2009.92
K. Hattori, Ryousuke Kimura, N. Nakajima, T. Fujii, Y. Kado, Bing Zhang, T. Hazugawa, K. Takadama
{"title":"Hybrid Indoor Location Estimation System Using Image Processing and WiFi Strength","authors":"K. Hattori, Ryousuke Kimura, N. Nakajima, T. Fujii, Y. Kado, Bing Zhang, T. Hazugawa, K. Takadama","doi":"10.1109/WNIS.2009.92","DOIUrl":"https://doi.org/10.1109/WNIS.2009.92","url":null,"abstract":"Recently, the service of cellular phone which is dependent on the location is spreading widely. Various techniques are suggested for the location estimation in indoor, however, indoor location estimation techniques have many subjects with a cost and an aspect of the accuracy. To deal with these subjects, we propose a quite new hybrid indoor location estimation method for paying attention to a smart phone with built-in wifi and camera. The proposal method is able to realized both highly accuracy of indoor location estimation and low cost by using the two-dimensional marker, wifi base stations, and the radio wave strength of adhoc communications. Verified by using simulation was able to demonstrate the effectiveness.","PeriodicalId":280001,"journal":{"name":"2009 International Conference on Wireless Networks and Information Systems","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129807871","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
Channel Estimation in Time and Frequency Domain in OFDM Systems OFDM系统时频域信道估计
2009 International Conference on Wireless Networks and Information Systems Pub Date : 2009-12-28 DOI: 10.1109/WNIS.2009.31
Z. Taheri, M. Ardebilipour, M. Mohammadi
{"title":"Channel Estimation in Time and Frequency Domain in OFDM Systems","authors":"Z. Taheri, M. Ardebilipour, M. Mohammadi","doi":"10.1109/WNIS.2009.31","DOIUrl":"https://doi.org/10.1109/WNIS.2009.31","url":null,"abstract":"In Orthogonal Frequency Division Multiplexing (OFDM) systems over fading channels, channel estimation is carried out by transmitting pilot symbols in different patterns. The process consists of two steps. First, the estimation of channel at pilot frequencies is done based on LS criteria. Then, this estimation is interpolated using linear interpolation, cubic interpolation, and spline interpolation. In this paper, we propose a two dimensional (2-D) pilot-aided channel estimator for OFDM systems, whose purpose is to reduce bit error rate by using different pilot arrangement in fast fading channels. The major concept behind the proposed scheme is to estimate the channel in time and frequency domain. So we first obtain the channel frequency response of a number of subcarriers via before-mentioned interpolators in time domain. Next, using this estimations and the channel responses, which obtained in pilot frequencies we estimate the channel in frequency domain and achieve the channel in all frequencies. Consequently, using the fewer pilots, the more accurate channel estimation will be obtained. We have compared the performance of our proposed 2-D channel estimator with conventional channel estimators.","PeriodicalId":280001,"journal":{"name":"2009 International Conference on Wireless Networks and Information Systems","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128278915","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 High-performance Pseudo-random Number Generator Based on FPGA 基于FPGA的高性能伪随机数发生器
2009 International Conference on Wireless Networks and Information Systems Pub Date : 2009-12-28 DOI: 10.1109/WNIS.2009.67
Ding Jun, Li Na, Guo Yixiong, Yang Jun
{"title":"A High-performance Pseudo-random Number Generator Based on FPGA","authors":"Ding Jun, Li Na, Guo Yixiong, Yang Jun","doi":"10.1109/WNIS.2009.67","DOIUrl":"https://doi.org/10.1109/WNIS.2009.67","url":null,"abstract":"This article mainly describes a way of designing an efficient pseudo-random number generator. Combining that the cellular automaton has many characteristics, such as simple rules of the component units, the local connectivity of units, the high degree of parallelism in information processing, and the complicated global characteristics, we use the rule 30 of one-dimensional cellular automaton to drive the state change. Finally, the pseudo-random numbers produced from the generator are tested the performance. And the results show that this design can be better applied to cryptography to ensure information technology and network security[1].","PeriodicalId":280001,"journal":{"name":"2009 International Conference on Wireless Networks and Information Systems","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127447694","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
Notice of Violation of IEEE Publication PrinciplesThe Research on Mutual Exclusion Algorithm in Distributed System 分布式系统中互斥算法的研究
2009 International Conference on Wireless Networks and Information Systems Pub Date : 2009-12-28 DOI: 10.1109/WNIS.2009.15
Chengjun Wang
{"title":"Notice of Violation of IEEE Publication PrinciplesThe Research on Mutual Exclusion Algorithm in Distributed System","authors":"Chengjun Wang","doi":"10.1109/WNIS.2009.15","DOIUrl":"https://doi.org/10.1109/WNIS.2009.15","url":null,"abstract":"Systems involving multiple processes are often most easily programmed using critical regions. When a process has to read or update certain shared data structures, it first enters a critical region to achieve mutual exclusion and ensure that no other process will use the shared data structures at the same time. In single-processor systems, critical regions are protected using semaphores, monitors, and similar constructs. In this paper, we will research how critical regions and mutual exclusion can be implemented in distributed systems.","PeriodicalId":280001,"journal":{"name":"2009 International Conference on Wireless Networks and Information Systems","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129116319","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 Comparison between Space-time Blocks Codes and Trellis Codes under Maximum Likelihood Sequence Estimator 在极大似然序列估计下空时分组码与格子码的比较
2009 International Conference on Wireless Networks and Information Systems Pub Date : 2009-12-28 DOI: 10.1109/WNIS.2009.75
Jingping Liu, Huichang Zhao
{"title":"The Comparison between Space-time Blocks Codes and Trellis Codes under Maximum Likelihood Sequence Estimator","authors":"Jingping Liu, Huichang Zhao","doi":"10.1109/WNIS.2009.75","DOIUrl":"https://doi.org/10.1109/WNIS.2009.75","url":null,"abstract":"In multiple input and multiple output (MIMO) system, the channel code is very important and complex compare single antenna system. Space-time codes (STC) were proposed to solve the problem. In space-time codes family the space-time block code and space-time trellis code are applied in many cases. In this paper we proposed the maximum likelihood detector used in space-time trellis codes system, and compare the difference between these two kinds of codes under maximum likelihood sequence estimator, get which situation is better to these two kinds of STC.","PeriodicalId":280001,"journal":{"name":"2009 International Conference on Wireless Networks and Information Systems","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126798509","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
Design and Simulation of a FPGA-Based Demodulator for Low-bit Remote Subcarrier Signal 基于fpga的低比特远程副载波信号解调器的设计与仿真
2009 International Conference on Wireless Networks and Information Systems Pub Date : 2009-12-28 DOI: 10.1109/WNIS.2009.34
Gao Cuidong, Zhao Qi
{"title":"Design and Simulation of a FPGA-Based Demodulator for Low-bit Remote Subcarrier Signal","authors":"Gao Cuidong, Zhao Qi","doi":"10.1109/WNIS.2009.34","DOIUrl":"https://doi.org/10.1109/WNIS.2009.34","url":null,"abstract":"This paper mainly introduced a FPGA-based design model for low-bit Remote Subcarrier. This demodulation method is designed to accomplish carrier synchronization and bit synchronization quickly and effectively. It can achieve synchronization in FPGA which refer to the theory of software wireless. We should validate the arithmetic whether can satisfy the need for feasibility and reliability. The Simulation results of the design model show the model can meet the demodulation request.","PeriodicalId":280001,"journal":{"name":"2009 International Conference on Wireless Networks and Information Systems","volume":"11 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120911400","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
Analysis of the Framework for Financial Decision Support System 财务决策支持系统框架分析
2009 International Conference on Wireless Networks and Information Systems Pub Date : 2009-12-28 DOI: 10.1109/WNIS.2009.66
Minli Zhang, Y. Gu, Junwu Zhu
{"title":"Analysis of the Framework for Financial Decision Support System","authors":"Minli Zhang, Y. Gu, Junwu Zhu","doi":"10.1109/WNIS.2009.66","DOIUrl":"https://doi.org/10.1109/WNIS.2009.66","url":null,"abstract":"Financial decisions play a critical role in today's enterprise financial management activities. Therefore, the study of financial decision support system (FDSS) is of great significance since the right business decisions can greatly improve the enterprise decision effects. Considering the above issue, we present a framework for the financial decision support system in this paper.","PeriodicalId":280001,"journal":{"name":"2009 International Conference on Wireless Networks and Information Systems","volume":"79A 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121162626","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
Error Resilient Transcoding for Wireless Video Transmission 无线视频传输的容错转码
2009 International Conference on Wireless Networks and Information Systems Pub Date : 2009-12-28 DOI: 10.1109/WNIS.2009.39
Xinchen Zhang, M. Huang
{"title":"Error Resilient Transcoding for Wireless Video Transmission","authors":"Xinchen Zhang, M. Huang","doi":"10.1109/WNIS.2009.39","DOIUrl":"https://doi.org/10.1109/WNIS.2009.39","url":null,"abstract":"Video transmission through wireless channels is still a challenging problem on the limitations in bandwidth and the presence of channel errors. Video transcoding, due to its high practical values for a wide range of networked video applications, has become an active research topic. It is typically used to reduce the rate and change the format of the originally encoded video source to match network conditions and terminal capabilities. Error resilient video transcoding can insert error resilient tools in the compressed video to enhance error resilience of the video over wireless channels by increasing bit rate. In this paper, firstly we outline the technical issues and research results related to video transcoding, Then we discuss techniques for reducing the complexity and improving the video quality, such as intra marcoblock refresh, synchronization marker insertion, error concealment, joint optimization, redundant slices, unequal error protection, and so on. To achieve good resilient performance, a experimental video transcoding is designed and established. The results show its improved video quality at the reducing the complexity and the cost of bit rate.","PeriodicalId":280001,"journal":{"name":"2009 International Conference on Wireless Networks and Information Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121040931","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
Modelling a Wireless Sensor Network as a Small World Network 无线传感器网络的小世界网络建模
2009 International Conference on Wireless Networks and Information Systems Pub Date : 2009-12-28 DOI: 10.1109/WNIS.2009.57
S. Chinnappen-Rimer, G. Hancke
{"title":"Modelling a Wireless Sensor Network as a Small World Network","authors":"S. Chinnappen-Rimer, G. Hancke","doi":"10.1109/WNIS.2009.57","DOIUrl":"https://doi.org/10.1109/WNIS.2009.57","url":null,"abstract":"Wireless sensor networks experience a number of problems not found in wired networks, such as limited power resources, location identification and message routing in a wireless medium. Analysis of small world networks have shown that it is possible to transmit information from one node to another node some random distance away within a small number of hops (i.e. small world networks have a small diameter). The objective of this paper is to show that it is possible to model a wireless sensor network as a small world network by using multiple sink nodes to emulate the long edge required in small world networks. The two key areas that would benefit from modelling wireless networks as small world networks are localization and routing.","PeriodicalId":280001,"journal":{"name":"2009 International Conference on Wireless Networks and Information Systems","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121508980","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 New Switching Strategy for Different Transfer Mode in Multi-antenna Systems 多天线系统中不同传输模式下的切换策略
2009 International Conference on Wireless Networks and Information Systems Pub Date : 2009-12-28 DOI: 10.1109/WNIS.2009.33
Teng Zhijun, Yan Juan, He Ping, Zhang Xiaoyu
{"title":"A New Switching Strategy for Different Transfer Mode in Multi-antenna Systems","authors":"Teng Zhijun, Yan Juan, He Ping, Zhang Xiaoyu","doi":"10.1109/WNIS.2009.33","DOIUrl":"https://doi.org/10.1109/WNIS.2009.33","url":null,"abstract":"Due to the problem that the capacity, bit ratio error and other performance index of MIMO system will deteriorate if antenna has stronger correlation, a feasible algorithm based on power control strategy is proposed. The new algorithm analyzes the influence of correlation on system capacity, then uses signal strength as switch strategy between MIMO and SISO system. This makes the system more stable even though in the stronger correlation situation. Simulation proves that the new algorithm is feasible and valid.","PeriodicalId":280001,"journal":{"name":"2009 International Conference on Wireless Networks and Information Systems","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121528013","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
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