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Space-time decoding using a modified LMMSE algorithm 使用改进的LMMSE算法进行时空解码
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407265
M. Sandell
{"title":"Space-time decoding using a modified LMMSE algorithm","authors":"M. Sandell","doi":"10.1109/ISWCS.2004.1407265","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407265","url":null,"abstract":"Iterative decoding has been proposed to improve the performance of multiple-input, multiple-output (MIMO) systems, where extrinsic information is passed between the space-time decoder and the channel decoder. A linear minimum mean-squared error (LMMSE) estimator accepting a priori information has been proposed as an equaliser for single antenna systems and in this paper we discuss its use as a space-time decoder. We also derive a novel modification, called the self-iterating LMMSE decoder, and present simulation results. It is shown that this modified LMMSE decoder can achieve huge gains over the conventional LMMSE decoder. Also both LMMSE decoders can supply a significant gain with iterative decoding, and with enough diversity and iterations, their performance approach that of the optimal decoder.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124319239","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
Cross-layer routing in wireless mesh networks 无线网状网络中的跨层路由
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407261
L. Iannone, R. Khalili, Kave Salamatian, S. Fdida
{"title":"Cross-layer routing in wireless mesh networks","authors":"L. Iannone, R. Khalili, Kave Salamatian, S. Fdida","doi":"10.1109/ISWCS.2004.1407261","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407261","url":null,"abstract":"Routing in wireless network is challenging because of the unpredictable behavior of the medium and the proactive effect of interference. In order to exploit all the advantages that the wireless medium offers, new routing metrics must be explored. These metrics should come from a cross-layer approach in order to make the routing layer aware of the local issues of the underling layers. In the present paper, we explore three primitive physical layer parameters: interference, packet success rate, and data rate. We define the metrics so that the routing level can correctly find paths that offer: low levels of generated interference, reliability in terms of packet success rate, and highest available transmission rate. We prove that for cross-layer based routing, if the metrics are well designed, the problem is NP-complete.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124782618","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: 123
Guaranteeing quality of service in mobile radio networks by means of link adaptation algorithms 利用链路自适应算法保证移动无线网络的服务质量
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407235
J. Gozálvez, M. López-Benítez, Ó. Lázaro
{"title":"Guaranteeing quality of service in mobile radio networks by means of link adaptation algorithms","authors":"J. Gozálvez, M. López-Benítez, Ó. Lázaro","doi":"10.1109/ISWCS.2004.1407235","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407235","url":null,"abstract":"Link adaptation has been proven to be an efficient technique to enhance the performance of mobile communication systems. The design of link adaptation has mainly concentrated on improving throughput performance. Although this design strategy can be considered appropriate for best effort services, multimedia services have important constraints in terms of transmission delay and error rates that can be tolerated without considerable degradation in the quality of service that the user might experience. In this context, this paper presents link adaptation algorithms that are able to control the experienced error rate and also to trade-off between throughput and error rate. The proposed algorithms are evaluated for real-time H.263 video transmissions in a packet-switched mobile radio network based on the GPRS standard.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124857229","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
Personal trusted device in personal communications 个人通信中的个人信任设备
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407275
J. Porras, Pekka Jäppinen, P. Hiirsalmi, Arto Hämäläinen, S. Saalasti, R. Koponen, S. Keski-Jaskari
{"title":"Personal trusted device in personal communications","authors":"J. Porras, Pekka Jäppinen, P. Hiirsalmi, Arto Hämäläinen, S. Saalasti, R. Koponen, S. Keski-Jaskari","doi":"10.1109/ISWCS.2004.1407275","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407275","url":null,"abstract":"In this paper an approach to personal communications through the concept of personal trusted device is presented. The personal trusted device based architecture consists of separate layers, connectivity, middleware and applications. At the moment most of the effort has been put into the connectivity layer. The proposed architecture is verified through three applications: access control system, guidance system and fitness system.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124860554","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
BerlinTainment - an agent-based serviceware framework for context-aware services BerlinTainment——一个基于代理的服务软件框架，用于上下文感知服务
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407246
J. Wohltorf, R. Cissée, A. Rieger, Heiko Scheunemann
{"title":"BerlinTainment - an agent-based serviceware framework for context-aware services","authors":"J. Wohltorf, R. Cissée, A. Rieger, Heiko Scheunemann","doi":"10.1109/ISWCS.2004.1407246","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407246","url":null,"abstract":"In the near future, providers of mobile services will face increasing competition. Therefore, the ability to design, develop and deploy reliable context-aware services fast and easily will become essential. We introduce an agent-based serviceware framework assisting service providers in developing innovative services, thus reducing the time-to-market of the respective applications. The realized serviceware framework offers personalization, location awareness and device independence within each single service. We describe the utilization of the different modules of the framework as well as prototypical application services in the entertainment domain based on the framework developed within the BerlinTainment project.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124410790","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: 28
Handover performance with HIP and MIPv6 与HIP和MIPv6的切换性能
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407262
P. Jokela, T. Rinta-aho, Tony Jokikyyny, J. Wall, Martti Kuparinen, Heikki Mahkonen, Jan Melén, T. Kauppinen, J. Korhonen
{"title":"Handover performance with HIP and MIPv6","authors":"P. Jokela, T. Rinta-aho, Tony Jokikyyny, J. Wall, Martti Kuparinen, Heikki Mahkonen, Jan Melén, T. Kauppinen, J. Korhonen","doi":"10.1109/ISWCS.2004.1407262","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407262","url":null,"abstract":"Mobility management in the current Internet is designed to work with mobile IPv4 and, when IPv6 is available, with mobile IPv6. These solutions are based on the current architecture in the Internet, where the IP address represents both the locator and the identifier of the node. In the IETF, identity and location information separation has raised a lot of discussion and new ideas have emerged to separate these. Host identity protocol is one candidate that can be used for this separation. It introduces also a new way of handling mobility management taking advantage on the mentioned identity and location separation.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126322735","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: 44
Reliable transmission with low complexity Reed-Solomon block turbo codes 可靠传输低复杂度里德-所罗门块涡轮码
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407236
R. Zhou, A. Picart, R. Pyndiah, A. Goalic
{"title":"Reliable transmission with low complexity Reed-Solomon block turbo codes","authors":"R. Zhou, A. Picart, R. Pyndiah, A. Goalic","doi":"10.1109/ISWCS.2004.1407236","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407236","url":null,"abstract":"We show here that low complexity Reed-Solomon (RS) block turbo codes (BTC) based on Q-ary symbol and bit concatenation can both achieve reliable transmission at less than 1 dB from Shannon limit using quadrature phase shift keying (QPSK) over additive white Gaussian noise (AWGN) channel. These near Shannon performances are due to a proper choice of RS component codes in the construction of RS product codes. RS-BTC based on Q-ary symbol concatenation has a great advantage in terms of block size over those based on bit concatenation. Compared to Bose-Chaudhuri-Hocquenghem (BCH) BTC of similar code rate, its smaller memory size is worth noting from the practical point of view.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125953281","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
System performance evaluation of GERAN flexible layer one concept GERAN柔性层一概念的系统性能评价
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407227
J. Hulkkonen, M. Moisio
{"title":"System performance evaluation of GERAN flexible layer one concept","authors":"J. Hulkkonen, M. Moisio","doi":"10.1109/ISWCS.2004.1407227","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407227","url":null,"abstract":"The flexible layer one (FLO) concept for GERAN (GSM/EDGE radio access network) is part of the 3GPP release 6 standard. The advantage of FLO is that physical layer is configured at call setup, and thereby the link parameters can be optimized for the performance requirements of the service. This greatly improves service performance in GERAN and thus enables seamless continuity of new services across 3GPP radio access technologies. In this paper, we evaluate the network level gains of the GERAN FLO concept. Network capacity is evaluated using dynamic high-resolution system simulator. We assume a typical GSM/EDGE network with high traffic density and tight frequency plan. Network performance is evaluated for adaptive multi-rate speech, voice over IP, and real-time multimedia services. Simulation results show significant network capacity gain for the usage of FLO concept in GSM/EDGE networks.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"09 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127309529","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
On the iterative decoding of concatenated partial unit memory codes structures 串接部分单元存储器码结构的迭代译码
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407233
L. Fagoonee, B. Honary
{"title":"On the iterative decoding of concatenated partial unit memory codes structures","authors":"L. Fagoonee, B. Honary","doi":"10.1109/ISWCS.2004.1407233","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407233","url":null,"abstract":"The aim of this paper is to describe in detail the iterative decoding algorithm used during the implementation of concatenated partial unit memory (PUM) code structures, such as turbo and woven turbo constructions based on PUM codes. Previous published research by the authors have shown that such concatenated PUM code structures have better distance properties and performance than equivalent structures based on convolutional codes. The decoding algorithm presented is based on the max-log MAP algorithm used for classical turbo codes with component convolutional codes. Unlike the trellis of a convolutional code, the trellis of PUM codes is characterised by parallel branches between state pairs and multiple input branch labels. We show how the original max-log MAP algorithm is adapted to cope with the unusual trellis structure of PUM codes. The proof that our algorithm performs satisfactorily is illustrated by the relative performance, for different iterations, of turbo and woven turbo structures based on PUM codes, which approach the Shannon limit.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132097268","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 evaluation of channel estimation techniques for a proposed '4G' MC-CDMA based system in a time varying channel 时变信道中基于“4G”MC-CDMA系统信道估计技术的性能评估
1st International Symposium onWireless Communication Systems, 2004. Pub Date : 2004-09-20 DOI: 10.1109/ISWCS.2004.1407206
M. A. Cooper, A. Dowler, S. Armour, J. McGeehan
{"title":"Performance evaluation of channel estimation techniques for a proposed '4G' MC-CDMA based system in a time varying channel","authors":"M. A. Cooper, A. Dowler, S. Armour, J. McGeehan","doi":"10.1109/ISWCS.2004.1407206","DOIUrl":"https://doi.org/10.1109/ISWCS.2004.1407206","url":null,"abstract":"This paper investigates the performance of channel estimation techniques applied to a proposed fourth generation (4G) multi carrier - code division multiple access (MC-CDMA) system. Coherent detection requires a per-sub band estimation of the channel frequency response for each coded orthogonal frequency division multiplexing (COFDM) symbol. This paper compares the performance of a number of pilot symbol assisted modulation (PSAM) methods for achieving such estimates. Performance results are characterised by bit-error-rate (BER), data throughput (DT) and mean-squared error (MSE) for ETSI UTRA specified channel environments. It is shown that in an indoor environment, FFT filtering provides superior data throughput performance, whereas in a high Doppler vehicular environment, a reduced complexity Wiener filter is able to offer the best performance.","PeriodicalId":122977,"journal":{"name":"1st International Symposium onWireless Communication Systems, 2004.","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129240429","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
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