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Theoretical analysis of subband adaptive array combining cyclic prefix data transmission scheme 子带自适应阵列组合循环前缀数据传输方案的理论分析
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1182507
X. Tran, T. Taniguchi, Y. Karasawa
{"title":"Theoretical analysis of subband adaptive array combining cyclic prefix data transmission scheme","authors":"X. Tran, T. Taniguchi, Y. Karasawa","doi":"10.1109/ICCS.2002.1182507","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1182507","url":null,"abstract":"This paper presents a theoretical analysis of subband adaptive array combining the cyclic prefix transmission scheme (SBAA-CP) in a multipath fading environment. The exact expressions for optimal weights, array outputs and the output signal to interference plus noise ratio (SINR) are derived. The analysis shows that use of the cyclic prefix data transmission scheme can significantly improve the performance of subband adaptive array (SBAA). We also show that if the output SINR is plotted versus the delay of the delay path then the output SINR of SBAA-CP is in effect the SINR of SBAA shifted by C samples to the right.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"356 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115468792","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: 6
A high speed and low complexity integrated framework for JPEG2000 一个高速低复杂度的JPEG2000集成框架
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1182525
T. Tsai, Kuei-Lan Lin
{"title":"A high speed and low complexity integrated framework for JPEG2000","authors":"T. Tsai, Kuei-Lan Lin","doi":"10.1109/ICCS.2002.1182525","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1182525","url":null,"abstract":"This paper presents a high speed and low complexity integrated framework for JPEG2000. It addresses on the combined effects of the quantization and EBCOT modules. Since the EBCOT algorithm contains a high complexity computation and also becomes the bottleneck of JPEG2000, two speed-improved methods for EBCOT algorithm in JPEG2000 encoding system are proposed. These two methods can reduce the clock cycles to enhance the coding speed for pass checking efficiently and still preserve original functionality. In addition, a variable truncating quantization method has been applied to improve the speed for EBCOT. Finally, the computation complexity can be reduced by about 43% of the whole EBCOT.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123089962","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
Novel scheme for efficient and scalable multihoming support in IPv6 在IPv6中有效和可扩展的多宿主支持的新方案
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1183208
K. Kim, C.M. Park, T. Kim, S. Kim
{"title":"Novel scheme for efficient and scalable multihoming support in IPv6","authors":"K. Kim, C.M. Park, T. Kim, S. Kim","doi":"10.1109/ICCS.2002.1183208","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1183208","url":null,"abstract":"The typical motivation for multihoming is to improve reliability and performance. However, being multihomed is intrinsically complicated. Specially, the fundamental to IPv6 is the concept of firm route aggregation, by which that TLA (top level aggregator) will need to announce the aggregate of their space only to other TLA peers. Due to above reason, it requires a fair of amount of thought and careful configuration to deploy multihoming in IPv6. In this paper, we propose a new efficient and scalable multihoming scheme, which is to target for solving the technical and potential problem of multihoming support at the site exit router (RFC 2260). Multihoming supporting at the site exit uses tunneling between the border router of the ISP and the site exit router during link-failure. However, this tunneling may not be established where there do not exist contracts for traffic between ISPs. So, the key feature of our scheme is to establish a tunneling section directly between the site exit router at the multihomed site and the border router of the source site. Though additional functionalities must be included on the border router under our scheme, the proposed scheme not only has better adaptability but also can perform limited load sharing.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123738456","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
A packet discard scheme for loss control in IP networks with MPEG video traffic 在具有MPEG视频流量的IP网络中用于丢失控制的丢包方案
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1182526
M.R. Ito, Y. Bai
{"title":"A packet discard scheme for loss control in IP networks with MPEG video traffic","authors":"M.R. Ito, Y. Bai","doi":"10.1109/ICCS.2002.1182526","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1182526","url":null,"abstract":"An important issue for video transmission over IP networks is preservation of perceived video quality despite packet loss. Packet loss can be detrimental to compressed video. However, reducing packet loss to a very low level is difficult with current loss control techniques. Furthermore, even a very low objective loss probability can still seriously distort perceived video quality. This paper proposes a loss control scheme using video characteristics. It increases maximum loss tolerance for a desired level of video quality, providing better quality at equal loss ratios, as compared to a conventional packet discard scheme. Meanwhile, network efficiency is also improved.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125494250","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: 24
MC-CDMA systems with cyclic shift spreading codes transmit diversity over two-ray Rayleigh fading channels 采用循环移位扩频码的MC-CDMA系统在双射线瑞利衰落信道上传输分集
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1182464
Lin-Lin Fan, Jing Chen
{"title":"MC-CDMA systems with cyclic shift spreading codes transmit diversity over two-ray Rayleigh fading channels","authors":"Lin-Lin Fan, Jing Chen","doi":"10.1109/ICCS.2002.1182464","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1182464","url":null,"abstract":"Transmit diversity is one of the best approaches to combat the fading channels in high data rate wireless systems. We present a new transmit diversity scheme for MC-CDMA systems. It is composed of multiple transmission branches. Each branch transmits the same data symbol synchronously with the same spread code but with different delay. A RAKE receiver is employed in the frequency domain to obtain space diversity gains. Analysis and simulation results show that performance benefits can be achieved compared to conventional MC-CDMA systems in Rayleigh fading channels.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116040203","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
Performance of an adaptive multicarrier CDMA system 自适应多载波CDMA系统的性能
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1183299
T. Lok
{"title":"Performance of an adaptive multicarrier CDMA system","authors":"T. Lok","doi":"10.1109/ICCS.2002.1183299","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1183299","url":null,"abstract":"An adaptive multicarrier CDMA system is considered. In this system, each user is given a number of codes. Each code essentially creates a different transmission channel for the corresponding user. Each user uses one of the code channels to transmit a data symbol in each symbol interval. At the receiver, the noise and interference level at each code channel is monitored. If the noise and interference level at an available code channel is lower than that in the current code channel, a procedure, called code handoff, would be executed at allowed instants, i.e., the user would switch to the better code channel. Only power control and code handoff, which can be readily implemented, are required in the system. Analysis shows that interference power can be significantly reduced. With suitable choices of the codes, the effects of fading can also be alleviated. Simulations also show that the proposed system performs better than ordinary multicarrier CDMA systems.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122899597","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
A hybrid semantic scene-based error resilient system 基于混合语义场景的纠错系统
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1183278
J. Kuo, Chien-Wu Tsai, Ja-Ling Wu
{"title":"A hybrid semantic scene-based error resilient system","authors":"J. Kuo, Chien-Wu Tsai, Ja-Ling Wu","doi":"10.1109/ICCS.2002.1183278","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1183278","url":null,"abstract":"We propose a hybrid semantic scene-based error resilient system for H.263-based video. which can provide us an experimental platform for verifying the error robustness of H.263-based video with different arrangements. The scene-based error resilience approach is designed to improve the insufficiency of conventional error concealment schemes due to the occurrence of scene or shot change. This system gives us a lot of significant information about the effect of different combinations of error resilient techniques under different error conditions. In addition, some new error resilient techniques are proposed. The goal of this experimental system is to provide a developing assistant tool for constructing an error robust H.263-based video communication application.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114253073","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
HVS based wavelet watermarking with bit data embedded in color images 基于HVS的彩色图像嵌入位数据的小波水印
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1182523
M. Saito, M. Kino, S. Wada
{"title":"HVS based wavelet watermarking with bit data embedded in color images","authors":"M. Saito, M. Kino, S. Wada","doi":"10.1109/ICCS.2002.1182523","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1182523","url":null,"abstract":"In this paper, a wavelet-based perceptual watermarking considering human visual system (HVS) that is proposed by Barni et al. (see IEEE Trans. Image Processing., vol.10, no.5, p.783-791, 2001) for monotone images without embedding bit data is extended. In our method, an arbitrary length of bit data (binary pattern) can be embedded in brightness component of color images still keeping the perceptual quality of image. Pseudo random number (PN) sequence is introduced as a key to produce a watermarking code. The availability increases compared with the conventional methods. The robustness of our computationally efficient watermark extraction method to the attacks such as JPEG compression, cropping and color tone modification is shown in simulations.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114392133","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
A comparative study of MIMO capacity with different antenna topologies 不同天线拓扑结构下MIMO容量的比较研究
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1182511
Liang Xiao, Lin Dal, H. Zhuang, Shidong Zhou, Yan Yao
{"title":"A comparative study of MIMO capacity with different antenna topologies","authors":"Liang Xiao, Lin Dal, H. Zhuang, Shidong Zhou, Yan Yao","doi":"10.1109/ICCS.2002.1182511","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1182511","url":null,"abstract":"Multiple input/multiple output (MIMO) is a hot topic in wireless communication and has a great advantage in its capacity. We investigate the influence of antenna topology on MIMO capacity and by comparing three topology schemes we find that selecting a proper antenna topology increases the capacity evidently. Three schemes under study are the traditional point-to-point concentrated antenna topology (CON), the multipoint-to-point distributed antenna topology (DIS) and the clustered antenna topology (CLUSTER). We explore their average capacity under different antenna number and power allocation methods. Simulation results show that DIS and CLUSTER excel the traditional concentrated MIMO structure in capacity.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129616206","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: 6
A distributed admission control model for class-based networks using edge-to-edge QoS and SLS monitoring 使用边缘到边缘QoS和SLS监控的基于类的网络的分布式准入控制模型
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1182450
S. R. Lima, P. Carvalho, Alexandre Santos, V. Freitas
{"title":"A distributed admission control model for class-based networks using edge-to-edge QoS and SLS monitoring","authors":"S. R. Lima, P. Carvalho, Alexandre Santos, V. Freitas","doi":"10.1109/ICCS.2002.1182450","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1182450","url":null,"abstract":"The advent of class-based networks has brought new needs for network traffic control in order to assure a certain QoS level. Despite the existing proposals, achieving a generic admission control (AC) strategy for traffic entering these networks is still an open issue. This paper provides new insights on how AC shall be accomplished proposing an encompassing AC model for multi-service class-based networks, which covers both intra-domain and end-to-end operation, without requiring changes in the network core and complex AC signaling. For each service type, AC is distributed and based on both on-line edge-to-edge monitoring of relevant QoS parameters and SLSs utilization. Service monitoring, performed at egress nodes, provides adequate metrics to ingress nodes which take implicit or explicit AC decisions based on service-de pendent criteria. Although being oriented to flow AC. the model can easily be applied to SLS AC. SLS auditing and SLS traffic conditioning are tasks also covered.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128387437","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: 6
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