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2009 Australasian Telecommunication Networks and Applications Conference (ATNAC)最新文献

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Cooperative hybrid cyclic delay diversity scheme in dual-hop wireless networks 双跳无线网络中的协同混合循环时延分集方案
2009 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2009-11-01 DOI: 10.1109/ATNAC.2009.5464715
Yu-Jin Song, Jae-Seon Yoon, Hyoung-Kyu Song
{"title":"Cooperative hybrid cyclic delay diversity scheme in dual-hop wireless networks","authors":"Yu-Jin Song, Jae-Seon Yoon, Hyoung-Kyu Song","doi":"10.1109/ATNAC.2009.5464715","DOIUrl":"https://doi.org/10.1109/ATNAC.2009.5464715","url":null,"abstract":"Cooperative communication has been widely investigated to improve performance of wireless networks. In cooperative wireless system, various MIMO scheme such as OSTBC, CDD and V-BLAST can be easily applied and obtain diversity or multiplexing gain. These schemes cannot obtain diversity and multiplexing gain simultaneously. To guarantee both high throughput and reliable transmission, hybrid STBC can be applied. However, this typical hybrid scheme requires complex structure at the destination and generates a rate loss according to increasing the number of transmit antennas. Moreover, in cooperative wireless system, hybrid STBC is inflexible to choose relays because relays require specific STBC encoder. Therefore, in this paper, we propose the cooperative hybrid CDD scheme which can be easily applied with arbitrary number of relays without any rate loss. Furthermore, a modification is not necessary at the destination although the number of relays is changed.","PeriodicalId":224107,"journal":{"name":"2009 Australasian Telecommunication Networks and Applications Conference (ATNAC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114240866","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
QAM modulations over wavelet based OFDM channel for facial expression recognition 基于小波OFDM信道的QAM调制面部表情识别
2009 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2009-11-01 DOI: 10.1109/ATNAC.2009.5464960
K. Abdullah, S. Lajevardi, Z. M. Hussain
{"title":"QAM modulations over wavelet based OFDM channel for facial expression recognition","authors":"K. Abdullah, S. Lajevardi, Z. M. Hussain","doi":"10.1109/ATNAC.2009.5464960","DOIUrl":"https://doi.org/10.1109/ATNAC.2009.5464960","url":null,"abstract":"Facial expression recognition (FER) has attracted significant interest in the scientific community due to its importance for human centred interfaces. This study compare the effect of different modulation for person-independent facial expression recognition from face images. The image is transmitted based on wavelet based OFDM channel. Then, the higher order local autocorrelation (HLAC) is used for feature extraction and the features are classified using the naive Bayesian (NB) classifier. Six different facial expressions are considered. Experiments carried out on Cohn-Kanade database shows comparable performance between different modulation in received images based on classification accuracy. BER performance is also included to observe when FER is applied to the wavelet based OFDM channel in two different QAM modulations, 4- and 16-QAMs. It is shown that the biorthogonal wavelet family of bior5.5 of 4-QAM outperforms db2 of 4-QAM. When the system uses 16-QAM, the BER result also shows that bior5.5 is better than db2.","PeriodicalId":224107,"journal":{"name":"2009 Australasian Telecommunication Networks and Applications Conference (ATNAC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124703115","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-level virtual ring: a foundation network architecture to support peer-to-peer application in wireless sensor network 多级虚拟环:支持无线传感器网络中点对点应用的基础网络架构
2009 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 1900-01-01 DOI: 10.1109/ATNAC.2009.5464898
Longxiang Gao, Ming Li
{"title":"Multi-level virtual ring: a foundation network architecture to support peer-to-peer application in wireless sensor network","authors":"Longxiang Gao, Ming Li","doi":"10.1109/ATNAC.2009.5464898","DOIUrl":"https://doi.org/10.1109/ATNAC.2009.5464898","url":null,"abstract":"Two main problems prevent the deployment of peer-to-peer application in a wireless sensor network: the index table, which should be distributed stored rather than uses a central server as the director; the unique node identifier, which cannot use the global addresses. This paper presents a multi-level virtual ring (MVR) structure to solve these two problems.","PeriodicalId":224107,"journal":{"name":"2009 Australasian Telecommunication Networks and Applications Conference (ATNAC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127174653","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
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