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2012 International Symposium on Wireless Communication Systems (ISWCS)最新文献

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Interference alignment with limited feedback for two-cell interfering MIMO-MAC 双单元干扰MIMO-MAC的有限反馈干扰对准
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328431
N. Lee, W. Shin, R. Heath, B. Clerckx
{"title":"Interference alignment with limited feedback for two-cell interfering MIMO-MAC","authors":"N. Lee, W. Shin, R. Heath, B. Clerckx","doi":"10.1109/ISWCS.2012.6328431","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328431","url":null,"abstract":"In this paper, we consider a two-cell interfering multiple-input multiple-output multiple access channel (MIMO-MAC). We first investigate the multiplexing gain of such channel when users have perfect channel state information at the transmitter (CSIT) by exploiting an interference alignment scheme. In addition, we propose a quantized transmit beamforming vector feedback method for the interference alignment in the limited feedback system. On the basis of the proposed feedback framework, we analyze the rate gap loss and it is shown that in order to keep the same multiplexing gain with the case of perfect CSIT, the number of feedback bits per receiver should be increased linearly with the SNR in dB scale. Throughout the simulation results, it is shown that the sum-rate performance coincides with the derived results.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132737782","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: 32
Multipacket reception MAC schemes for the RFID EPC Gen2 protocol RFID EPC Gen2协议的多包接收MAC方案
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328380
Danilo De Donno, L. Tarricone, V. Lakafosis, M. Tentzeris
{"title":"Multipacket reception MAC schemes for the RFID EPC Gen2 protocol","authors":"Danilo De Donno, L. Tarricone, V. Lakafosis, M. Tentzeris","doi":"10.1109/ISWCS.2012.6328380","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328380","url":null,"abstract":"Maximizing the Radio Frequency IDentification (RFID) performance is one of the main challenges for a wide variety of applications, where the overall throughput can be significantly affected by undesired Tag-Tag collision events. The UHF EPC Class-1 Generation-2 (Gen2) protocol only specifies algorithms to avoid the collisions but makes no provision for their resolution. In this paper, performance enhancement of the RFID EPC Gen2 protocol exploiting Tag collision recovery is demonstrated, for the first time, in real time with measurements. Two simple and effective approaches to handle successful Tag acknowledgments of recovered collided packets are proposed and implemented on a software-defined Reader and programmable Tags. The overall throughput per time slot is increased by 72% over the standard Gen2 MAC scheme. The validity of such result is confirmed by the good agreement with simulations reported in the literature.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131410598","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
Utility based cooperative spectrum leasing in cognitive radio networks 认知无线网络中基于效用的协同频谱租赁
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328332
Yi Tang, Lijie Wang, D. Grace, Jibo Wei
{"title":"Utility based cooperative spectrum leasing in cognitive radio networks","authors":"Yi Tang, Lijie Wang, D. Grace, Jibo Wei","doi":"10.1109/ISWCS.2012.6328332","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328332","url":null,"abstract":"In this paper, we propose a cooperative spectrum leasing scheme for cognitive radio networks, in which both the primary user (PU) and the secondary user (SU) target to maximize their individual utility. The PU leases a portion of its spectrum to the SU to obtain revenue when its QoS is guaranteed, and the SU rents the spectrum to achieve its target data rate. This cooperative spectrum leasing problem is formulated as a Stackelberg game. The optimal strategy for the PU and SU on the pricing and spectrum renting is analyzed. Under this cooperative spectrum leasing scheme, both the PU and the SU improve their individual utility. This cooperative spectrum leasing scheme is a promising paradigm for both the PU and SU for its mutual benefit in cognitive radio systems.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115540668","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
Adaptive interference admission control for layered partially nonorthogonal block diagonalization for base station cooperative MIMO 基站协同MIMO分层部分非正交块对角化的自适应干扰接纳控制
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328349
Yusuke Oshima, A. Benjebbour, K. Higuchi
{"title":"Adaptive interference admission control for layered partially nonorthogonal block diagonalization for base station cooperative MIMO","authors":"Yusuke Oshima, A. Benjebbour, K. Higuchi","doi":"10.1109/ISWCS.2012.6328349","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328349","url":null,"abstract":"This paper proposes a method for adaptively controlling the admission of interference to users for our previously proposed layered partially non-orthogonal block diagonalization (BD) precoding method for downlink multiuser multiple-input multiple-output (MIMO) transmission that employs cooperation among multiple base stations (BS). The proposed method is applicable when some of the instantaneous channel state information (CSI) feedback between the user equipment and the respective BSs is missing if the path loss between the user equipment and BS is higher than a predetermined threshold. The proposed method alleviates the loss in the transmitter diversity (beam forming) gain caused by the perfect nulling of inter-user interference in BD. By allowing the inter-user interference from a link that has a high average path loss, the overall throughput performance of simple BD is enhanced. We show that the combination of layered transmission that restricts the set of BSs used for the signal transmission and adaptive control of interference admission significantly increases the throughput of BS cooperative multiuser MIMO with partial CSI feedback.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124181879","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 trade-offs for energy efficient localization based on EKFs 基于ekf的节能定位的性能权衡
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328418
L. Reggiani, Salar Bybordi
{"title":"Performance trade-offs for energy efficient localization based on EKFs","authors":"L. Reggiani, Salar Bybordi","doi":"10.1109/ISWCS.2012.6328418","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328418","url":null,"abstract":"Accurate ranging and localization are crucial applications for wireless sensor networks. Reliable position information, obtained with a reasonable complexity overhead and possibly low energy consumption, is necessary for a successful operation of these networks. The paper regards the analysis of the performance bounds of an approach for improving the trade-off between energy consumption and performance in a localization and tracking process. A set of fixed beacons is used for localizing a target that is moving in a limited environment and tracking is realized by mixing active signal transmissions, which allow using standard techniques for deriving distances and locations, as well as passive signal receptions, which exploit scattering caused by the target during signal propagation. Obviously, when the beacons exploit passive signal reflections, the target does not consume energy, differently from the steps characterized by the active exchange of radio signals. In the paper we present the analysis of the posterior Cramer-Rao Bound of this technique for a general scenario, highlighting the trade-offs between the energy savings and the performance costs in terms of localization error.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114902756","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
Impact-time concept for SON-Function coordination SON-Function协调的影响时间概念
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328321
Tobias Bandh, L. Schmelz
{"title":"Impact-time concept for SON-Function coordination","authors":"Tobias Bandh, L. Schmelz","doi":"10.1109/ISWCS.2012.6328321","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328321","url":null,"abstract":"Starting with the introduction of LTE, there is a high operator initiated demand for management automation. All automation requirements on network configuration, optimisation, and failure recovery are subsumed under the term Self-Organising Networks (SON). Within a SON a potentially larger number of SON-Functions individually perform specific management tasks. To prevent conflicting behaviour among different SON-Functions a SON-Coordinator is used that has to consider a variety of conflict types and the spatial and temporal impact of the SON-Functions. The Impact-time concept is composed of a set of time intervals describing the pair-wise temporal interdependency of SON-Functions, and also expressing restrictions in the availability of performance data. An experimental validation of the concept is presented.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116333724","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
Quantifying network conditions for the support of cooperative over non-cooperative communication 量化网络条件，支持合作而非合作通信
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328362
Ioannis Chatzigeorgiou
{"title":"Quantifying network conditions for the support of cooperative over non-cooperative communication","authors":"Ioannis Chatzigeorgiou","doi":"10.1109/ISWCS.2012.6328362","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328362","url":null,"abstract":"Cooperative systems are being widely investigated and error probability expressions for various network configurations have been obtained. Even though analytical models are accurate, they often lack tractability and do not shed much light on the interplay between channel conditions, network parameters and transceiver characteristics. This paper exploits a recently introduced technique, which uses signal-to-noise ratios to characterise the modulation and coding scheme of transceivers for Rayleigh fading channels. Based on this technique, which allows decoupling of error probability analysis and radio specifications, we derive conditions on the adopted transmission scheme to ensure that cooperation improves the outage probability of each user in decode-and-forward networks with statistically similar or dissimilar uplink channels.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125937479","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
Pre- and post-FFT interference leakage minimization for MIMO OFDM networks MIMO OFDM网络fft前后干扰泄漏最小化
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328429
C. Lameiro, Oscar Gonzalez, J. Vía, I. Santamaría, R. Heath
{"title":"Pre- and post-FFT interference leakage minimization for MIMO OFDM networks","authors":"C. Lameiro, Oscar Gonzalez, J. Vía, I. Santamaría, R. Heath","doi":"10.1109/ISWCS.2012.6328429","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328429","url":null,"abstract":"Interference alignment (IA) has been shown to achieve the maximum degrees of freedom in the multiple-input multiple-output (MIMO) K-user interference channel (IFC). In the presence of frequency-selective channels, orthogonal frequency-division multiplexing (OFDM) is typically used to deal with the multipath nature of the channel. While IA techniques can be applied in a per-subcarrier basis (post-FFT), the existence of symbol timing offsets (STOs) between the desired and the interfering OFDM symbols decreases the system performance dramatically. To solve this problem, we design pre-FFT precoders and decoders for single-beam MIMO IFCs for OFDM transmissions. Since the IA decoders operate before the FFT, they mitigate the interference before synchronization takes place. We show that our proposed scheme improves the system performance when STOs occur, in comparison with traditional post-FFT IA techniques. We provide simulation results to compare post and pre-FFT beamforming techniques and to illustrate the performance of the proposed method.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126133548","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
A novel constrained-Viterbi algorithm with linear equalization and grouping assistance 一种具有线性均衡和分组辅助的约束viterbi算法
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328364
Karim Badawi, C. Benkeser, C. Roth, Qiuting Huang, A. Burg
{"title":"A novel constrained-Viterbi algorithm with linear equalization and grouping assistance","authors":"Karim Badawi, C. Benkeser, C. Roth, Qiuting Huang, A. Burg","doi":"10.1109/ISWCS.2012.6328364","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328364","url":null,"abstract":"In this paper, we propose a novel linear equalization and progressive grouping-assisted constrained Viterbi algorithm (LEG-CVA) as a near-maximum likelihood sequence estimation (MLSE) approach for the downlink. The simulation results show that the reduced-complexity algorithm is highly attractive with large system dimensions such as those in the time-duplexing high speed packet access (TD-HSPA) system, where the proposed algorithm outperforms traditional detection techniques.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124832127","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
Interference cancellation in coded OFDM/OQAM 编码OFDM/OQAM中的干扰消除
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328354
M. Aoude, R. Vallet, S. Nedic
{"title":"Interference cancellation in coded OFDM/OQAM","authors":"M. Aoude, R. Vallet, S. Nedic","doi":"10.1109/ISWCS.2012.6328354","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328354","url":null,"abstract":"This paper addresses the concatenation of a convolutional code and COFDM/OQAM modulation transmitted over a time-dispersive radio channel. The proposed receiver is composed of a suitable OFDM/OQAM filter-bank demodulator, followed by an intersymbol and inter(-subchannel) interferences canceller and a SISO (Soft Input - Soft Output) decoder put in Turbo-like mode. The iterative algorithms are based on message passing on bipartite graphs. As an example, performance comparison with the linear subchannel equalization is presented.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130016060","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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