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2015 International Symposium on Wireless Communication Systems (ISWCS)最新文献

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Broadcasting in massive MIMO using OSTBC with reduced dimension 基于降维OSTBC的大规模MIMO广播
2015 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2015-08-01 DOI: 10.1109/ISWCS.2015.7454369
Marcus Karlsson, Emil Björnson, E. Larsson
{"title":"Broadcasting in massive MIMO using OSTBC with reduced dimension","authors":"Marcus Karlsson, Emil Björnson, E. Larsson","doi":"10.1109/ISWCS.2015.7454369","DOIUrl":"https://doi.org/10.1109/ISWCS.2015.7454369","url":null,"abstract":"An analysis of broadcasting in massive MIMO (multiple-input and multiple-output) systems with a limited coherence interval is presented. When broadcasting common information, such as control signals, the base station does not have channel state information to the terminals. We propose that the base station broadcasts this common information using a low dimensional orthogonal space-time block code (OSTBC). This code is mapped onto the large antenna array with the use of a dimension reducing matrix, effectively “shrinking” the channel. The terminal can estimate the effective channel and decode the information, even when the coherence interval is short compared to the number of base station antennas. Different OSTBCs are compared in terms of outage capacity in practical scenarios using estimated CSI. In particular, the trade-off between diversity and rate, when little or no time/frequency diversity is available, is investigated.","PeriodicalId":383105,"journal":{"name":"2015 International Symposium on Wireless Communication Systems (ISWCS)","volume":"211 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114842468","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
Design and deployment of infrastructure-independent D2D networks without centralized coordination 设计和部署独立于基础设施的D2D网络，无需集中协调
2015 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2015-08-01 DOI: 10.1109/ISWCS.2015.7454367
Huan-Bang Li, Lin Shan, T. Matsuda, R. Miura
{"title":"Design and deployment of infrastructure-independent D2D networks without centralized coordination","authors":"Huan-Bang Li, Lin Shan, T. Matsuda, R. Miura","doi":"10.1109/ISWCS.2015.7454367","DOIUrl":"https://doi.org/10.1109/ISWCS.2015.7454367","url":null,"abstract":"We designed and developed a test bed of infrastructure independent wireless network that connects end devices directly without centralized coordination. Various types of end devices are implemented and used for different scenarios. There is neither base station nor access point, so as to avoid the single-point-of-failure. The developed test bed has been deployed successfully in two real fields. It operates independently to provide various community services, while it can be bridged to internet through a connected end device. The test bed can also be used as a complementary network when the infrastructure is out of service due to accident or emergency.","PeriodicalId":383105,"journal":{"name":"2015 International Symposium on Wireless Communication Systems (ISWCS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116973129","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: 3
An optimal transmission policy for energy harvesting systems with continuous curves 连续曲线能量收集系统的最优传输策略
2015 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2015-08-01 DOI: 10.1109/ISWCS.2015.7454375
M. Rezaee, R. Kaboli, M. Mirmohseni, M. Aref
{"title":"An optimal transmission policy for energy harvesting systems with continuous curves","authors":"M. Rezaee, R. Kaboli, M. Mirmohseni, M. Aref","doi":"10.1109/ISWCS.2015.7454375","DOIUrl":"https://doi.org/10.1109/ISWCS.2015.7454375","url":null,"abstract":"Energy harvesting has been developed as an effective technology for communication systems in order to extend the lifetime of these systems. In this work, we consider a single-user energy harvesting wireless communication system, in which both of the arrival data and the harvested energy curves are modeled as continuous functions. Our goal is to find an offline algorithm, which maximizes the amount of data which is transmitted to the receiver node by a given deadline. If more than one scheme exist that transmit the maximum data, we choose the one with minimum utilized energy at the transmitter node.","PeriodicalId":383105,"journal":{"name":"2015 International Symposium on Wireless Communication Systems (ISWCS)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123231359","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
System-level simulations of selected aspects of 5G cellular networks 5G蜂窝网络选定方面的系统级模拟
2015 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2015-08-01 DOI: 10.1109/ISWCS.2015.7454442
K. Bakowski, Marcin Rodziewicz, P. Sroka
{"title":"System-level simulations of selected aspects of 5G cellular networks","authors":"K. Bakowski, Marcin Rodziewicz, P. Sroka","doi":"10.1109/ISWCS.2015.7454442","DOIUrl":"https://doi.org/10.1109/ISWCS.2015.7454442","url":null,"abstract":"This paper presents a system-level simulation approach developed at the Poznan University of Technology for the evaluation of selected aspects of next generation wireless systems. The details of the considered environment and propagation models are given, as well as several important aspects of the simulator implementation methodology. Selected use cases of the presented simulation platform are demonstrated in relation to different research topics in the area of next generation wireless systems. The achieved simulation results show that the problems related to the development of modern wireless systems require detailed and precise modeling of the environment in order to accurately validate system performance.","PeriodicalId":383105,"journal":{"name":"2015 International Symposium on Wireless Communication Systems (ISWCS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121880540","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
Nonparametric estimation of information causality between analog narrowband signals 窄带模拟信号间信息因果关系的非参数估计
2015 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2015-08-01 DOI: 10.1109/ISWCS.2015.7454361
Simona Poilinca, G. Abreu
{"title":"Nonparametric estimation of information causality between analog narrowband signals","authors":"Simona Poilinca, G. Abreu","doi":"10.1109/ISWCS.2015.7454361","DOIUrl":"https://doi.org/10.1109/ISWCS.2015.7454361","url":null,"abstract":"In this paper we address the dimensionality problem regarding information causality estimation and propose a new method to approximate directed information by identifying and eliminating superfluous calculations. Using only the most informational components we reduce conditional mutual information terms while capturing all the instantaneous or lagged dependencies between stochastic signals. Our method is tested on simulated analog narrowband signals with varying causal relationships.","PeriodicalId":383105,"journal":{"name":"2015 International Symposium on Wireless Communication Systems (ISWCS)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121400294","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
Artificial Intelligence-based 5G network capacity planning and operation 基于人工智能的5G网络容量规划与运营
2015 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2015-08-01 DOI: 10.1109/ISWCS.2015.7454338
J. Pérez-Romero, O. Sallent, R. Ferrús, R. Agustí
{"title":"Artificial Intelligence-based 5G network capacity planning and operation","authors":"J. Pérez-Romero, O. Sallent, R. Ferrús, R. Agustí","doi":"10.1109/ISWCS.2015.7454338","DOIUrl":"https://doi.org/10.1109/ISWCS.2015.7454338","url":null,"abstract":"The highly demanding requirements envisaged for future 5G networks together with the required support of new customers from vertical industries (e.g. e-health, automotive, energy) pose a big challenge for operators in 5G on how to balance investments, user experience and profitability. There will be the need to revisit the actual methodologies of network planning and operation, fully exploiting cognitive capabilities that embrace knowledge and intelligence to achieve a proper understanding of the network usage in multiple dimensions. In this respect, this paper presents a vision on how these planning and operation processes can rely on the inclusion of Artificial Intelligence (AI) concepts that will allow devising models to characterize the impact of many correlated inputs on specific operator objectives and to drive decisions for different processes.","PeriodicalId":383105,"journal":{"name":"2015 International Symposium on Wireless Communication Systems (ISWCS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121422287","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
Implementation and performance evaluation of an FBMC-based PMR system for broadband PPDR applications 宽带PPDR应用中基于fbmc的PMR系统的实现与性能评估
2015 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2015-08-01 DOI: 10.1109/ISWCS.2015.7454411
Oriol Font-Bach, N. Bartzoudis, David López Bueno, M. Payaró
{"title":"Implementation and performance evaluation of an FBMC-based PMR system for broadband PPDR applications","authors":"Oriol Font-Bach, N. Bartzoudis, David López Bueno, M. Payaró","doi":"10.1109/ISWCS.2015.7454411","DOIUrl":"https://doi.org/10.1109/ISWCS.2015.7454411","url":null,"abstract":"In this paper, an experimental performance evaluation is carried out within a Professional Mobile Radio / Public Protection and Disaster Relief (PMR/PPDR) communication scenario that features two related key enablers for the evolution towards broadband transmission in those systems: (i) the use of post-OFDM modulations (ii) an efficient use of the spectrum via spectrum sharing among the legacy narrowband tranmissions and the newly proposed broadband transmission. The real-time experimental laboratory setup was assembled to operate in conditions as realistic as possible by combining hardware prototypes for the broadband transmitters, commercial PMR terminals and a radio channel emulator (providing mobile channels conditions based on the Extended Pedestrian A specifications). The experimental results show that co-existence in a shared spectrum scenario is possible and that the performance degradation is kept at a low level, as long as the broadband transmission is making use of spectrally agile post-OFDM modulations such as filterbank multicarrier (FBMC).","PeriodicalId":383105,"journal":{"name":"2015 International Symposium on Wireless Communication Systems (ISWCS)","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125729764","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
Transceiver I/Q imbalance and widely-linear spatial processing in large antenna systems 大型天线系统中收发器I/Q不平衡和宽线性空间处理
2015 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2015-08-01 DOI: 10.1109/ISWCS.2015.7454428
Aki Hakkarainen, J. Werner, M. Renfors, K. Dandekar, M. Valkama
{"title":"Transceiver I/Q imbalance and widely-linear spatial processing in large antenna systems","authors":"Aki Hakkarainen, J. Werner, M. Renfors, K. Dandekar, M. Valkama","doi":"10.1109/ISWCS.2015.7454428","DOIUrl":"https://doi.org/10.1109/ISWCS.2015.7454428","url":null,"abstract":"In order to keep the total device costs low, large antenna systems require affordable radio frequency (RF) electronics. Unfortunately, this requirement results in RF impairments and may thus cause performance degradations. In this paper, we show how one of these impairments, namely in-phase/quadrature (I/Q) imbalance, distorts the received signals in an uplink multiuser multiple-input multiple-output (MU-MIMO) system where multiple users are spatially multiplexed into the same time-frequency resource. In addition, we present three receiver (RX) post-processing methods and analyze their performance with different multicarrier scenarios under transceiver I/Q imbalances. The results clearly show that the simple maximum ratio combining (MRC) based RX processing suffers heavily from the presence of multiple spatially multiplexed users, especially in case of I/Q imbalances, and cannot necessarily provide sufficient performance even with the number of RX antennas approaching infinity. In contrast, the linear minimum mean-square error (LMMSE) processing offers more flexible and efficient operation characteristics but is also shown to suffer from performance degradations due to I/Q imbalances. To overcome this problem, we formulate a widely-linear (WL) variant of the MMSE method, called WL-MMSE, which provides good performance also under I/Q imbalances in different multiple access scenarios, and is thus a good candidate for future software defined radios where flexibility is a key concern.","PeriodicalId":383105,"journal":{"name":"2015 International Symposium on Wireless Communication Systems (ISWCS)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130044436","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
Performance of TCP over 802.11ac based WLANs via testbed measurements 通过测试平台测量基于802.11ac的wlan上TCP的性能
2015 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2015-08-01 DOI: 10.1109/ISWCS.2015.7454420
Hakan Alakoca, M. Karaca, Günes Karabulut-Kurt
{"title":"Performance of TCP over 802.11ac based WLANs via testbed measurements","authors":"Hakan Alakoca, M. Karaca, Günes Karabulut-Kurt","doi":"10.1109/ISWCS.2015.7454420","DOIUrl":"https://doi.org/10.1109/ISWCS.2015.7454420","url":null,"abstract":"This paper presents measurement results collected from an IEEE 802.11ac based wireless test-bed to experimentally demonstrate how 802.11ac affects the throughput performance of a WLAN with different Transmission Control Protocol (TCP) variants implemented in Linux kernel. We compare the performance of 802.11ac with 802.11n for both single and multi-hop transmissions in a wireless mesh network (WMN). Our first observation is that the single-hop performance of 802.11ac outperforms 802.11n, however, as the number of transmission hops increases 802.11ac does not have a significant advantage over 802.11n. In addition, our measurement results show that the best throughput performance with the minimum standard deviation is achieved by TCP CUBIC and TCP BIC for multi-hop transmission. Lastly, we present the results on the behavior of congestion window (CW) with each TCP variant, and observe that the convergence time of the CW is smaller with 802.11ac for both single hop and multi-hop scenarios.","PeriodicalId":383105,"journal":{"name":"2015 International Symposium on Wireless Communication Systems (ISWCS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125827668","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
Lossless source coding for a Heegard-Berger problem with two sources and degraded reconstruction sets 具有两个源和退化重构集的Heegard-Berger问题的无损编码
2015 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2015-08-01 DOI: 10.1109/ISWCS.2015.7454324
Meryem Benammar, A. Zaidi
{"title":"Lossless source coding for a Heegard-Berger problem with two sources and degraded reconstruction sets","authors":"Meryem Benammar, A. Zaidi","doi":"10.1109/ISWCS.2015.7454324","DOIUrl":"https://doi.org/10.1109/ISWCS.2015.7454324","url":null,"abstract":"This work investigates the problem of lossless compression of two arbitrarily correlated memoryless sources in an instance of Heegard-Berger problem with degraded reconstruction sets. Specifically, one of the sources is to be reproduced losslessly by two separate decoders, and the other one is to be reproduced losslessly by only one of the two decoders. The decoders observe side information sequences that are arbitrarily correlated among them, and with the sources. We establish a single-letter characterization of the optimal compression rate of this model. We also discuss several examples, and highlight the utility of an appropriate joint compression of the two sources for it to be optimal.","PeriodicalId":383105,"journal":{"name":"2015 International Symposium on Wireless Communication Systems (ISWCS)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126087494","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
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