发布求助
文献互助 智能选刊 最新文献

2006 International Zurich Seminar on Communications最新文献

筛选
英文 中文
Network Coding for Efficient Wireless Unicast 高效无线单播的网络编码
2006 International Zurich Seminar on Communications Pub Date : 2006-02-21 DOI: 10.1109/IZS.2006.1649082
D. Lun, M. Médard, R. Koetter
{"title":"Network Coding for Efficient Wireless Unicast","authors":"D. Lun, M. Médard, R. Koetter","doi":"10.1109/IZS.2006.1649082","DOIUrl":"https://doi.org/10.1109/IZS.2006.1649082","url":null,"abstract":"We consider the problem of establishing an efficient unicast connection over a wireless packet network. We show how network coding, combined with distributed flow optimization, gives a practicable approach that promises to significantly outperform the present approach of end-to-end or link-by-link retransmission combined with route optimization, where performance may be measured in terms of energy consumption, congestion, or any other cost that increases with the number of transmissions made by each node. We present a specific coding scheme and specific distributed flow optimization techniques that may be used to form the basis of a protocol","PeriodicalId":405389,"journal":{"name":"2006 International Zurich Seminar on Communications","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130264762","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: 119
General Characterization of Bezout Space-Time Equalizers and Precoder Bezout时空均衡器和预编码器的一般特性
2006 International Zurich Seminar on Communications Pub Date : 2006-02-21 DOI: 10.1109/IZS.2006.1649071
H. Boche, V. Pohl
{"title":"General Characterization of Bezout Space-Time Equalizers and Precoder","authors":"H. Boche, V. Pohl","doi":"10.1109/IZS.2006.1649071","DOIUrl":"https://doi.org/10.1109/IZS.2006.1649071","url":null,"abstract":"This paper gives a general framework for the investigation of Bezout space-time equalizers, not only for finite impulse response (FIR) systems, but for general transfer functions. Necessary and sufficient conditions are given under which a matrix valued transfer function possess a left (or right) inverse with certain desired system theoretical properties (e.g. causality, stability, approximation behavior), and a parametrization of all left inverses is presented. Moreover, sufficient conditions for the existence of the canonical inner-outer factorization are given","PeriodicalId":405389,"journal":{"name":"2006 International Zurich Seminar on Communications","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129995041","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
Diversity-Multiplexing Tradeoff of MIMO Systems with Partial Power Control 部分功率控制下MIMO系统的分集-复用权衡
2006 International Zurich Seminar on Communications Pub Date : 2006-02-21 DOI: 10.1109/IZS.2006.1649091
Thanh Tùng Kim, M. Skoglund
{"title":"Diversity-Multiplexing Tradeoff of MIMO Systems with Partial Power Control","authors":"Thanh Tùng Kim, M. Skoglund","doi":"10.1109/IZS.2006.1649091","DOIUrl":"https://doi.org/10.1109/IZS.2006.1649091","url":null,"abstract":"The tradeoff between the diversity and multiplexing gains that can be simultaneously achieved over a slowly fading multiple-antenna channel with partial transmit side information is characterized in a recursive manner. It is assumed that the information rate grows as the long-term average transmit power increases, but does not adapt to the channel state. Partial power control is shown to be instrumental in achieving the optimal tradeoff over such a system. Our results indicate that the diversity gain can be increased considerably even with coarsely quantized channel state information, especially at low multiplexing gains","PeriodicalId":405389,"journal":{"name":"2006 International Zurich Seminar on Communications","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126270449","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 Multiple User Opportunistic Scheme: The Grassmannian Approach 多用户机会方案:格拉斯曼方法
2006 International Zurich Seminar on Communications Pub Date : 2006-02-21 DOI: 10.1109/IZS.2006.1649098
N. Zorba, A. Pérez-Neira
{"title":"A Multiple User Opportunistic Scheme: The Grassmannian Approach","authors":"N. Zorba, A. Pérez-Neira","doi":"10.1109/IZS.2006.1649098","DOIUrl":"https://doi.org/10.1109/IZS.2006.1649098","url":null,"abstract":"Scheduling in a broadcast (BC) channel based on partial channel state information at the transmitter (CSIT) is carried out in an opportunistic way. In an orthogonal approach, the number of generated beams would be equal to the available base station antennas, but this paper presents a scheme where more beams are generated. The novel scheme follows the Grassmannian line packing approach to guarantee the largest orthogonality among the generated beams. Each of the selected users performs an interference mitigation that partially cancels the multiuser interference terms that arise in this multiplexing scenario. Analytical expressions are derived for the novel scheme and the superior performance of this approach is also demonstrated via simulations for an outdoor wireless scenario. Beside achieving larger system sum rate, we show that this proposal also provides a lower system delay","PeriodicalId":405389,"journal":{"name":"2006 International Zurich Seminar on Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129020800","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: 8
Precoding Schemes for the MIMO-GBC MIMO-GBC的预编码方案
2006 International Zurich Seminar on Communications Pub Date : 2006-02-21 DOI: 10.1109/IZS.2006.1649066
F. Boccardi, F. Tosato, G. Caire
{"title":"Precoding Schemes for the MIMO-GBC","authors":"F. Boccardi, F. Tosato, G. Caire","doi":"10.1109/IZS.2006.1649066","DOIUrl":"https://doi.org/10.1109/IZS.2006.1649066","url":null,"abstract":"The use of M antennas at the base station and of transmitter channel state information can boost the downlink throughput by a factor M (multiplexing gain), even though the receivers have a single antenna and do not cooperate. In this semi-tutorial work, we discuss some low-complexity alternatives to achieve a downlink throughput very close to the optimal sum capacity. We review and compare these alternatives and we show that, in the simple setting of independently fading channels, relatively traditional forms of linear beamforming achieve the best tradeoff between performance and complexity. These results somehow call for a reconsideration of the emphasis that certain recently proposed precoding techniques have enjoyed both in scientific literature and in technology development","PeriodicalId":405389,"journal":{"name":"2006 International Zurich Seminar on Communications","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122530684","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: 69
Appropriate Antenna Patterns For A Compact MIMO Receiver 小型MIMO接收机的合适天线模式
2006 International Zurich Seminar on Communications Pub Date : 2006-02-21 DOI: 10.1109/IZS.2006.1649069
R. Bains, R. Muller
{"title":"Appropriate Antenna Patterns For A Compact MIMO Receiver","authors":"R. Bains, R. Muller","doi":"10.1109/IZS.2006.1649069","DOIUrl":"https://doi.org/10.1109/IZS.2006.1649069","url":null,"abstract":"A compact MIMO receiver is reported previously (R.R. Muller et al., 2005) which uses only a single active receiving antenna and multiple passive elements to achieve spatial diversity. The passive elements are used to construct suitable antenna patterns which can be rotated 360 degrees around to achieve a MIMO effect. This paper discusses some antenna patterns which can be used for this purpose. An example of an antenna with one active dipole and 6 passive dipoles distributed on a circle around it is given. The distance between the active dipole and the passive elements is chosen to be lambda/8, which means that the antenna system will have a diameter of approximately lambda/4. Further the broadband properties of this antenna system is considered in terms of mutual information for different frequencies","PeriodicalId":405389,"journal":{"name":"2006 International Zurich Seminar on Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130648109","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
Buffer sizing theory for bursty TCP flows 突发TCP流的缓冲大小理论
2006 International Zurich Seminar on Communications Pub Date : 2006-02-21 DOI: 10.1109/IZS.2006.1649089
D. Wischik
{"title":"Buffer sizing theory for bursty TCP flows","authors":"D. Wischik","doi":"10.1109/IZS.2006.1649089","DOIUrl":"https://doi.org/10.1109/IZS.2006.1649089","url":null,"abstract":"In a router serving many TCP flows, queues will build up from time to time. The manner in which queues build up depends on the buffer space available and on the burstiness of the TCP traffic. Conversely, the traffic generated by a TCP flow depends on the congestion it sees at queues along its route. In order to decide how big buffers should be, we need to understand the interaction between these effects. This paper reviews the buffer-sizing theory in G. Raina and D. Wischik (2005) and extends it to cope with bursty TCP traffic. This enables us to explain an observation about TCP pacing made in A. Aggarwal et al. (2000)","PeriodicalId":405389,"journal":{"name":"2006 International Zurich Seminar on Communications","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125343139","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: 22
Lightweight Monitoring of Edge-based Admission Control 基于边缘的准入控制轻量级监控
2006 International Zurich Seminar on Communications Pub Date : 2006-02-21 DOI: 10.1109/IZS.2006.1649076
Ignacio Más, Joel Brage, Gunnar Karlsson
{"title":"Lightweight Monitoring of Edge-based Admission Control","authors":"Ignacio Más, Joel Brage, Gunnar Karlsson","doi":"10.1109/IZS.2006.1649076","DOIUrl":"https://doi.org/10.1109/IZS.2006.1649076","url":null,"abstract":"This paper describes a software monitor that can control and police end-to-end admission control schemes. The monitor has low hardware requirements and it is well suited to be implemented in access routers or firewalls. We present a prototype implemented with commodity hardware and open source software which performs protocol compliance monitoring and can log and filter out single misbehaving flows. The protocol monitor can easily be extended to police other end to end protocols such as TCP, ensuring end-to-end QoS service level agreements with end users","PeriodicalId":405389,"journal":{"name":"2006 International Zurich Seminar on Communications","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117155076","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
On the Relation between Lattice-Reduction-Aided Equalization and Partial-Response Signaling 格约简辅助均衡与部分响应信号的关系
2006 International Zurich Seminar on Communications Pub Date : 2006-02-21 DOI: 10.1109/IZS.2006.1649072
R. Fischer, C. Siegl
{"title":"On the Relation between Lattice-Reduction-Aided Equalization and Partial-Response Signaling","authors":"R. Fischer, C. Siegl","doi":"10.1109/IZS.2006.1649072","DOIUrl":"https://doi.org/10.1109/IZS.2006.1649072","url":null,"abstract":"Equalization for channels with intersymbol interference is studied. In particular, we show that the well-known technique of partial-response signaling is the analogon to lattice-reduction-aided equalization of MIMO channels. An algorithm for factorizing the channel transfer function, replacing the lattice reduction in MIMO channels, is derived. It is shown that the proposed schemes offer a good trade-off between complexity and performance. Especially, precoding the partial-response part is worthwhile; only limited channel-state information at the transmitter is required and channel coding can be applied immediately","PeriodicalId":405389,"journal":{"name":"2006 International Zurich Seminar on Communications","volume":"341 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131979174","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: 9
On the use of sounding in wideband channels 关于在宽带信道中探测的使用
2006 International Zurich Seminar on Communications Pub Date : 2006-02-21 DOI: 10.1109/IZS.2006.1649107
Sheng Jing, Lizhong Zheng, M. Médard
{"title":"On the use of sounding in wideband channels","authors":"Sheng Jing, Lizhong Zheng, M. Médard","doi":"10.1109/IZS.2006.1649107","DOIUrl":"https://doi.org/10.1109/IZS.2006.1649107","url":null,"abstract":"In wideband channels, the energy per degree of freedom does not suffice to provide an accurate measurement of the channel over the entire spectrum. However, in the presence of feedback, we may garner information at the sender about some aspects of the channel quality over certain portion of the spectrum. In this paper, we investigate a scheme to capture the effect of such information. We consider channel sounding with a finite amount of energy over a block-fading channel in both time and frequency. The quality of each subchannel is assessed as being the cross-over probability in a BSC. In order to characterize a judicious policy for allocating energy to different subchannels in view of establishing their usefulness for transmission, we use a multi-armed bandit approach. This approach provides us with a cohesive framework to consider the relative costs and benefits of allotting energy for sounding versus transmission, and for repeated sounding of a single channel versus sounding of different channels. In particular, we are able to give a characterization of the number of subchannels that should be probed for capacity maximization in terms of the available transmission energy, the available bandwidth and the fading characteristics of the channel","PeriodicalId":405389,"journal":{"name":"2006 International Zurich Seminar on Communications","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129523392","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信