发布求助
文献互助 智能选刊 最新文献

12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)最新文献

筛选
英文 中文
A new modified genetic algorithm for multiuser detection in DS/CDMA systems 基于改进遗传算法的DS/CDMA系统多用户检测
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-10-01 DOI: 10.1109/PIMRC.2001.965421
M. Shayesteh, M. Menhaj, B. Nobary
{"title":"A new modified genetic algorithm for multiuser detection in DS/CDMA systems","authors":"M. Shayesteh, M. Menhaj, B. Nobary","doi":"10.1109/PIMRC.2001.965421","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965421","url":null,"abstract":"The conventional single user detector in DS-CDMA (direct sequence code division multiple access) systems involves multiple access interference and the near-far effect which cause the limitation of capacity. On the other hand, the computational complexity of the optimum multiuser detector grows exponentially with the number of users. There has been a lot of interest in suboptimal multiuser detectors with less complexity and reasonable performance. In this paper we apply the classic and new modified genetic algorithms for multiuser detection of DS/CDMA signals. It is shown that the classic genetic algorithm (GA) reaches an error floor at high signal to noise ratios while the proposed method has higher performance than the classic one and is comparable to the optimum single user detector with much less complexity than the optimum multiuser detector.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132938994","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
Dynamic channel allocation schemes in mobile radio systems with frequency hopping 跳频移动无线电系统中的动态信道分配方案
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965281
R. Verdone, A. Zanella, Luca Zuliani
{"title":"Dynamic channel allocation schemes in mobile radio systems with frequency hopping","authors":"R. Verdone, A. Zanella, Luca Zuliani","doi":"10.1109/PIMRC.2001.965281","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965281","url":null,"abstract":"In this paper a F-TDMA based mobile radio system using both dynamic channel allocation (DCA) and frequency hopping (FH) is investigated. We propose and evaluate the performance of a new interference adaptive DCA (IA-DCA) algorithm that is suitably designed for a network implementing FH. The results we show in the paper have been achieved by means of a simulation tool which takes propagation, mobility, interference, traffic and channel allocation into account. Moreover, the advantages of using FH are accounted for by using suitable analytical models that give the frame error rate as a function of the carrier-to-interference ratio and the number of hopping frequencies. We compare the performance of our proposal to that of fixed channel allocation (FCA) with and without FH, and the well known IA-DCA schemes investigated in the literature in the absence of FH. The performance results show that interesting synergic effects can be obtained in terms of forced termination and user satisfaction probability by using both DCA and FH in a F-TDMA based mobile radio network.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"519 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123121809","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
Constrained CMA-based multiuser detection under unknown multipath 未知多路径下基于约束cma的多用户检测
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965384
Zhengyuan Xu, Ping Liu
{"title":"Constrained CMA-based multiuser detection under unknown multipath","authors":"Zhengyuan Xu, Ping Liu","doi":"10.1109/PIMRC.2001.965384","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965384","url":null,"abstract":"In this paper, a constant modulus algorithm (CMA) based multiuser detector is proposed under linear constraints. Different from previous work, we explicitly consider the multipath effect. Therefore multiple constraints are incorporated into the optimization problem to mitigate multipath distortions. The algorithm will work well if constraint parameters are properly pre-selected. However, the detector's performance highly depends on the constraints. Thus we jointly update the detector and the constraint vector by minimizing the Godard's cost function with respect to both the detector and the constraint vector. It is shown that under certain conditions in the absence of noise, the algorithm guarantees global convergence. Numerical examples are presented to demonstrate the results.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115737969","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 ultra-wide band channel sounder for mobile communication systems 一种用于移动通信系统的超宽带信道测深器
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965272
T. Takeuchi, Masaya Tamura
{"title":"A ultra-wide band channel sounder for mobile communication systems","authors":"T. Takeuchi, Masaya Tamura","doi":"10.1109/PIMRC.2001.965272","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965272","url":null,"abstract":"A prototype ultra-wideband channel sounder with time delay resolution of 0.5 ns has been developed. The sounder uses the spread spectrum technique based on the classical sliding correlator, however it can measure a power delay profile up to a time delay of 16 /spl mu/s with 5 kchip/s in real time. And also, it has more than 35 dB amplitude dynamic range with a very simple hardware structure.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117132075","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: 13
Software defined radio reconfiguration management 软件定义的无线电重新配置管理
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965498
K. Moessner, S. Gultchev, R. Tafazolli
{"title":"Software defined radio reconfiguration management","authors":"K. Moessner, S. Gultchev, R. Tafazolli","doi":"10.1109/PIMRC.2001.965498","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965498","url":null,"abstract":"Reconfiguration of configurable radio communication platforms contains uncounted difficulties and pitfalls. This paper contributes to the solution of this situation with a proposal of a management architecture capable to prevent mis-configurations and also to ensure reliable reconfiguration of terminals. An introduction to reconfiguration management and its requirements is followed by a description of our reconfiguration management architecture (RMA). Later parts contain an outline of the mechanisms used to implement parts of the RMA.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117141378","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
Design of a high-speed MC-CDMA system for broadband mobile radio communications 用于宽带移动无线电通信的高速MC-CDMA系统设计
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965310
A. Madhukumar, F. Chin
{"title":"Design of a high-speed MC-CDMA system for broadband mobile radio communications","authors":"A. Madhukumar, F. Chin","doi":"10.1109/PIMRC.2001.965310","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965310","url":null,"abstract":"This paper is concerned with a new method to enhance the bandwidth efficiency of an MC-CDMA system by using a residue number based representation for information symbols. The residues are mapped into a set of orthogonal sequences and are transmitted in parallel. To increase the data rate further, a modified residue representation scheme is used with significantly lesser number of orthogonal sequences. A multicarrier modulation scheme is used for both transmission and reception of residue channels. The issues involved in the design of an enhanced RNS based MC-CDMA architecture is discussed and the performance of the system is evaluated in a frequency selective Rayleigh fading channel via extensive simulations.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124935107","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
Performance comparison of transport control protocols over mobile ad hoc networks 移动自组网中传输控制协议的性能比较
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965325
Dong Sun, H. Man
{"title":"Performance comparison of transport control protocols over mobile ad hoc networks","authors":"Dong Sun, H. Man","doi":"10.1109/PIMRC.2001.965325","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965325","url":null,"abstract":"In mobile ad hoc networks, researches have been concentrated on the implementations and performance comparisons of routing protocols. Little attention was paid to the performance of the end-to-end TCP connection. We study the route breakages caused by mobility and their effects on the performance in different TCP implementations (e.g. Tahoe, Reno, NewReno and Sack). Our performance simulation shows that current TCP implementations can not guarantee a stable performance because they are impossible to distinguish a packet loss caused by congestion or by route breakage. A new metric, weighted route length is introduced in the comparison of TCP performance in the mobile ad hoc network. We demonstrate that TCP Sack generally performs better than Reno, NewReno and Tahoe. The effects of interactions among routing, MAC and TCP protocol are also discussed. This paper presents the simulation results of four TCP implementations and provides comparisons based on some important performance metrics (throughput, goodput, transfer time) and multimedia QoS measurement (average packet delay).","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115253770","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: 15
High-throughput, high-performance OFDM via pseudo-orthogonal carrier interferometry coding 高吞吐量，高性能的OFDM通过伪正交载波干涉编码
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965328
D. Wiegandt, C. Nassar
{"title":"High-throughput, high-performance OFDM via pseudo-orthogonal carrier interferometry coding","authors":"D. Wiegandt, C. Nassar","doi":"10.1109/PIMRC.2001.965328","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965328","url":null,"abstract":"OFDM (orthogonal frequency division multiplexing) is susceptible to poor probability of error performance in fading channels. To enhance OFDM's performance, many architectures utilize channel coding. The addition of coding, adds both redundancy and frequency diversity, but comes at a cost of reduced overall throughput (typically by a factor of 2). This paper introduces a novel carrier interferometry phase coding to enhance the performance in OFDM systems without bandwidth expansion or decreased throughput. It is shown that at a bit error rate of 10/sup 3/, this method gains 14 dB over OFDM, equaling the performance of COFDM. A system is now available demonstrating the benefits of coded OFDM, which maintains the throughput of OFDM. The cost is one of increased receiver complexity.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122329528","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
TCP/IP header compression: proposal and performance investigation on a WCDMA air interface TCP/IP报头压缩:WCDMA空中接口的提议和性能研究
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965395
M. Rossi, A. Giovanardi, M. Zorzi, G. Mazzini
{"title":"TCP/IP header compression: proposal and performance investigation on a WCDMA air interface","authors":"M. Rossi, A. Giovanardi, M. Zorzi, G. Mazzini","doi":"10.1109/PIMRC.2001.965395","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965395","url":null,"abstract":"Two TCP/IP header compression (HC) schemes for wireless networks are proposed and investigated on a WCDMA air interface. These novel schemes are compared with the classical ones by means of a TCP/IP New Reno simulator taking as input WCDMA channel traces. These channel traces are derived by using a simulator built according to the UMTS standard requirements. The RLC (radio link control) level operates in transparent mode, while overhead is added to simulate the presence of a MAC level. Some new performance metrics are introduced to evaluate the performance of HC schemes.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114036050","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
Packet transmission strategies to provide quality of service in a TDD-TD/CDMA system 在TDD-TD/CDMA系统中提供服务质量的分组传输策略
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965279
J. Pérez-Romero, R. Agustí, O. Sallent, F. Casadevall
{"title":"Packet transmission strategies to provide quality of service in a TDD-TD/CDMA system","authors":"J. Pérez-Romero, R. Agustí, O. Sallent, F. Casadevall","doi":"10.1109/PIMRC.2001.965279","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965279","url":null,"abstract":"This paper presents some packet transmission mechanisms dealing with the provision of quality of service (QoS) over the radio interface in a TDD-TD/CDMA scenario such as the one considered for the UTRA TDD proposal in the UMTS system. To this extent, two different multiple access protocols are proposed for such an environment, based on the ISMA and DSA++ approaches, and they are complemented by a polling mechanism that allows a reduction in the access time. A scheduling algorithm is also considered in order to prioritise transmissions to guarantee the specific QoS requirements for the different services.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129520042","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
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：481959085
Book学术官方微信