Pub Date : 2013-05-06DOI: 10.1109/ICTEL.2013.6632156
Wael Guibène, C. Khirallah, D. Vukobratović, J. Thompson, D. Slock
This paper investigates the energy-efficiency of well-known spectrum sensing algorithms that exploit the sensed signal's energy, autocorrelation or cyclostationarity features to estimate the presence or absence of that signal in a given spectrum. We investigate the trade-off between energy-efficiency, complexity, and sensing accuracy of those detectors and, their suitability for energy-efficient WiFi spectrum sensing that enables interoperability of Long Term Evolution Advanced (LTE-A) and WiFi systems. Results obtained show significant improvement in correct detection probability and reduced sensing time using the low complexity autocorrelation detectors when compared to other detectors under low signal to noise ratio channel conditions.
{"title":"Energy-aware multiband communications in heterogeneous networks","authors":"Wael Guibène, C. Khirallah, D. Vukobratović, J. Thompson, D. Slock","doi":"10.1109/ICTEL.2013.6632156","DOIUrl":"https://doi.org/10.1109/ICTEL.2013.6632156","url":null,"abstract":"This paper investigates the energy-efficiency of well-known spectrum sensing algorithms that exploit the sensed signal's energy, autocorrelation or cyclostationarity features to estimate the presence or absence of that signal in a given spectrum. We investigate the trade-off between energy-efficiency, complexity, and sensing accuracy of those detectors and, their suitability for energy-efficient WiFi spectrum sensing that enables interoperability of Long Term Evolution Advanced (LTE-A) and WiFi systems. Results obtained show significant improvement in correct detection probability and reduced sensing time using the low complexity autocorrelation detectors when compared to other detectors under low signal to noise ratio channel conditions.","PeriodicalId":430600,"journal":{"name":"ICT 2013","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128657588","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}
Pub Date : 2013-05-06DOI: 10.1109/ICTEL.2013.6632095
Chungang Yang, Jiandong Li, Min Sheng, Hongyan Li, Wei Liu, Qin Liu, Yuzhou Li
To efficiently utilize network resource and significantly improve the overall energy efficiency (EE), an energy-efficient system architecture based on improved IEEE 1900.4 framework is presented with EE considerations among multi-levels of operators, core networks, radio access networks and terminals (OCRT). Furthermore, an EE optimal multi-level OCRT architecture and a corresponding triply-cycle-based-CRM (TCB-CRM) functional structure are proposed in this paper. Finally, an implementation scheme based on cognitive information cycle and a cognitive information interaction protocol are provided for EE optimization for green composition networks.
{"title":"Cognitive information-assisted energy efficiency design in green composition networks","authors":"Chungang Yang, Jiandong Li, Min Sheng, Hongyan Li, Wei Liu, Qin Liu, Yuzhou Li","doi":"10.1109/ICTEL.2013.6632095","DOIUrl":"https://doi.org/10.1109/ICTEL.2013.6632095","url":null,"abstract":"To efficiently utilize network resource and significantly improve the overall energy efficiency (EE), an energy-efficient system architecture based on improved IEEE 1900.4 framework is presented with EE considerations among multi-levels of operators, core networks, radio access networks and terminals (OCRT). Furthermore, an EE optimal multi-level OCRT architecture and a corresponding triply-cycle-based-CRM (TCB-CRM) functional structure are proposed in this paper. Finally, an implementation scheme based on cognitive information cycle and a cognitive information interaction protocol are provided for EE optimization for green composition networks.","PeriodicalId":430600,"journal":{"name":"ICT 2013","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132135816","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}
Pub Date : 2013-05-06DOI: 10.1109/ICTEL.2013.6632136
Hussein Kobeissi, O. Bazzi, Y. Nasser
Cognitive Radio has become an effective solution for the scarcity and the inefficient use of the spectrum. The performance of the cognitive radio (CR) system depends however on how well it can maximize the usage of the free bands without causing interference to primary users. The ability to detect the primary user in CR systems relies on Spectrum Sensing (SS). In this paper we propose a method to improve the performance of Energy Detection SS using Wavelet Denoising. Cooperative and non-cooperative sensing scenarios are considered. Results show that sensing accuracy can be highly improved in the cooperative scenario when the leaves of the tree of wavelet packet transform are used as a basis for denoising. Different mother wavelets are also tested. Simulation results are analyzed and are compared to traditional results.
{"title":"Wavelet denoising in cooperative and NonCooperative spectrum sensing","authors":"Hussein Kobeissi, O. Bazzi, Y. Nasser","doi":"10.1109/ICTEL.2013.6632136","DOIUrl":"https://doi.org/10.1109/ICTEL.2013.6632136","url":null,"abstract":"Cognitive Radio has become an effective solution for the scarcity and the inefficient use of the spectrum. The performance of the cognitive radio (CR) system depends however on how well it can maximize the usage of the free bands without causing interference to primary users. The ability to detect the primary user in CR systems relies on Spectrum Sensing (SS). In this paper we propose a method to improve the performance of Energy Detection SS using Wavelet Denoising. Cooperative and non-cooperative sensing scenarios are considered. Results show that sensing accuracy can be highly improved in the cooperative scenario when the leaves of the tree of wavelet packet transform are used as a basis for denoising. Different mother wavelets are also tested. Simulation results are analyzed and are compared to traditional results.","PeriodicalId":430600,"journal":{"name":"ICT 2013","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130426761","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}
Pub Date : 2013-05-06DOI: 10.1109/ICTEL.2013.6632155
Ömer Faruk Çelebi, E. Zeydan, O. Kurt, Ömer Dedeoglu, Ömer Ileri, Burak AykutSungur, Ahmet Akan, S. Ergüt
Proliferation of data services has made it mandatory for operators to be able identify geographical regions with 3G connectivity discontinuity in a scalable and cost-efficient manner. The currently used methods for such analysis are either costly - such as in drive tests, partly unreliable - such as in network simulation approaches, or are not precise enough - such as in base station key performance indicators (KPI) based approaches. In this paper, towards addressing these inadequacies, we propose a 3G coverage analysis method that makes use of “big data” processing schemes and the vast amounts of network data logged in mobile operators. In the proposed scheme, the BSSAP mobility and radio resource management messages between the BSS and MSC nodes of the operator network are processed to identify inter-technology handovers from 3G (WCDMA) access to 2G (EDGE, GPRS, GSM). Demonstrative examples show that the proposed mechanism produces accurate and precise results, outperforming the base station KPI-based approach.
{"title":"On use of big data for enhancing network coverage analysis","authors":"Ömer Faruk Çelebi, E. Zeydan, O. Kurt, Ömer Dedeoglu, Ömer Ileri, Burak AykutSungur, Ahmet Akan, S. Ergüt","doi":"10.1109/ICTEL.2013.6632155","DOIUrl":"https://doi.org/10.1109/ICTEL.2013.6632155","url":null,"abstract":"Proliferation of data services has made it mandatory for operators to be able identify geographical regions with 3G connectivity discontinuity in a scalable and cost-efficient manner. The currently used methods for such analysis are either costly - such as in drive tests, partly unreliable - such as in network simulation approaches, or are not precise enough - such as in base station key performance indicators (KPI) based approaches. In this paper, towards addressing these inadequacies, we propose a 3G coverage analysis method that makes use of “big data” processing schemes and the vast amounts of network data logged in mobile operators. In the proposed scheme, the BSSAP mobility and radio resource management messages between the BSS and MSC nodes of the operator network are processed to identify inter-technology handovers from 3G (WCDMA) access to 2G (EDGE, GPRS, GSM). Demonstrative examples show that the proposed mechanism produces accurate and precise results, outperforming the base station KPI-based approach.","PeriodicalId":430600,"journal":{"name":"ICT 2013","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130488647","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}
Pub Date : 2013-05-06DOI: 10.1109/ICTEL.2013.6632161
Codé Diop, E. Exposito, C. Chassot
Enterprise Service Bus (ESB) allows the integration of pervasive, distributed and networked systems more and more designed as a composition of atomic and heterogeneous services. Offered services have various types of Quality of Service (QoS) that can be unpredictable and may lead to undesirable situations such as service unavailability, high response time, decrease of reliability, etc. These kinds of situation may be unacceptable for service consumers or systems that require a more controllable reliability, efficiency, performance, etc. Being between the service providers and requesters, the goal of this paper is to show how efficient strategies can be associated to the ESB to give it the ability to guarantee or to take into account the satisfaction of non-functional requirements during the service mediation. Using a cloud-based deployment, we will show also how to guarantee the ESB scalability when a large number of concurrent services can be provided and consumed via the ESB.
企业服务总线(Enterprise Service Bus, ESB)允许集成普及的、分布式的和网络化的系统，这些系统越来越多地被设计为原子服务和异构服务的组合。所提供的服务具有各种类型的服务质量(QoS)，这些服务质量可能是不可预测的，并可能导致不希望出现的情况，例如服务不可用、响应时间长、可靠性降低等。对于需要更可控的可靠性、效率、性能等的服务消费者或系统来说，这种情况可能是不可接受的。介于服务提供者和请求者之间，本文的目标是展示如何有效地将策略关联到ESB，从而使其能够保证或考虑在服务中介期间满足非功能需求。通过使用基于云的部署，我们还将展示在可以通过ESB提供和使用大量并发服务时如何保证ESB的可伸缩性。
{"title":"QoS and scalability management in an autonomic cloud-based networked service bus","authors":"Codé Diop, E. Exposito, C. Chassot","doi":"10.1109/ICTEL.2013.6632161","DOIUrl":"https://doi.org/10.1109/ICTEL.2013.6632161","url":null,"abstract":"Enterprise Service Bus (ESB) allows the integration of pervasive, distributed and networked systems more and more designed as a composition of atomic and heterogeneous services. Offered services have various types of Quality of Service (QoS) that can be unpredictable and may lead to undesirable situations such as service unavailability, high response time, decrease of reliability, etc. These kinds of situation may be unacceptable for service consumers or systems that require a more controllable reliability, efficiency, performance, etc. Being between the service providers and requesters, the goal of this paper is to show how efficient strategies can be associated to the ESB to give it the ability to guarantee or to take into account the satisfaction of non-functional requirements during the service mediation. Using a cloud-based deployment, we will show also how to guarantee the ESB scalability when a large number of concurrent services can be provided and consumed via the ESB.","PeriodicalId":430600,"journal":{"name":"ICT 2013","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127831848","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}
Pub Date : 2013-05-06DOI: 10.1109/ICTEL.2013.6632100
H. Ayad, A. Khalil, M. Fadlallah, F. Ndagijimana, J. Jomaah
This paper is dedicated to the study of rectangular dipole antennas that are loaded by metamaterials inclusions to create multi-band behavior devoted for telecommunication applications. After introducing a theoretical point of view about RLC trap-loaded antennas, simulations are performed to validate the approach of dual bands centered at 1.5 and 2.4 GHz. The next step is to add metamaterial inclusions to obtain the same frequency performance. Four split ring resonators (SRRs) are first added on the two arms of the dipole antenna. Finally, the SRRs are replaced by four multi split ring resonators (MSRRs). The excellent performance obtained in SRR-loaded antenna is maintained with the MSRR since the omni-directional patterns are conserved.
{"title":"Design of MSRR-loaded dual-band dipole PCB antennas","authors":"H. Ayad, A. Khalil, M. Fadlallah, F. Ndagijimana, J. Jomaah","doi":"10.1109/ICTEL.2013.6632100","DOIUrl":"https://doi.org/10.1109/ICTEL.2013.6632100","url":null,"abstract":"This paper is dedicated to the study of rectangular dipole antennas that are loaded by metamaterials inclusions to create multi-band behavior devoted for telecommunication applications. After introducing a theoretical point of view about RLC trap-loaded antennas, simulations are performed to validate the approach of dual bands centered at 1.5 and 2.4 GHz. The next step is to add metamaterial inclusions to obtain the same frequency performance. Four split ring resonators (SRRs) are first added on the two arms of the dipole antenna. Finally, the SRRs are replaced by four multi split ring resonators (MSRRs). The excellent performance obtained in SRR-loaded antenna is maintained with the MSRR since the omni-directional patterns are conserved.","PeriodicalId":430600,"journal":{"name":"ICT 2013","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127877593","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}
Pub Date : 2013-05-06DOI: 10.1109/ICTEL.2013.6632103
Nabih Alaoui, J. Cances, V. Meghdadi
Mobile Sensor networks have become a hot topic of research in the last decade. There are a lot of new applications which employ this kind of network architecture. For example, Body Area Network (BAN) is a new application where multiple sensors on different body parts simultaneously transmit their data to a monitoring unit. In the case of numerous sensors, the addition of active relays which can act as parity nodes in a bipartite graph enables to obtain redundant information to improve the integrity of the transmission. The network topology is somewhat equivalent to that of a block code. However, in the case of a small number of sensors, this technique becomes less efficient. On the other hand, using Automatic Repeat Request (ARQ) protocol, one can avoid transmission errors. In this paper we propose a protocol to combine the two correction methods mentioned above (relaying and ARQ) for mobile sensor networks for a small number of sensors which operate on quasi-static Rayleigh fading channel. Coding error correction is first applied, and then a detection layer will be added to detect errors that were not corrected by the error correction code. Power saving which is crucial in mobile sensor network is greatly improved by our proposed algorithm.
{"title":"A new protocol to enhance the transmission integrity of mobile sensor networks: Horizontal correction and vertical detection","authors":"Nabih Alaoui, J. Cances, V. Meghdadi","doi":"10.1109/ICTEL.2013.6632103","DOIUrl":"https://doi.org/10.1109/ICTEL.2013.6632103","url":null,"abstract":"Mobile Sensor networks have become a hot topic of research in the last decade. There are a lot of new applications which employ this kind of network architecture. For example, Body Area Network (BAN) is a new application where multiple sensors on different body parts simultaneously transmit their data to a monitoring unit. In the case of numerous sensors, the addition of active relays which can act as parity nodes in a bipartite graph enables to obtain redundant information to improve the integrity of the transmission. The network topology is somewhat equivalent to that of a block code. However, in the case of a small number of sensors, this technique becomes less efficient. On the other hand, using Automatic Repeat Request (ARQ) protocol, one can avoid transmission errors. In this paper we propose a protocol to combine the two correction methods mentioned above (relaying and ARQ) for mobile sensor networks for a small number of sensors which operate on quasi-static Rayleigh fading channel. Coding error correction is first applied, and then a detection layer will be added to detect errors that were not corrected by the error correction code. Power saving which is crucial in mobile sensor network is greatly improved by our proposed algorithm.","PeriodicalId":430600,"journal":{"name":"ICT 2013","volume":"163 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129283493","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}
Pub Date : 2013-05-06DOI: 10.1109/ICTEL.2013.6632110
N. Amdouni, M. Koubàa, T. Aguili
One limitation of a WDM all-optical network is the wavelength continuity constraint imposed by the all-optical cross-connect switches which do not allow a circuit to be placed on a non wavelength-continuous route. This constraint leads to inefficient utilization of wavelength channels and results in higher blocking probability. Rerouting is an effective approach that can increase the efficiency. In this paper, we employ intentional rerouting approach to improve the network utilization efficiency under dynamic traffic model. Intentional lightpath rerouting is to intentionally reroute already established lightpaths during their life period without affecting other existing lightpaths, so as to achieve a better blocking performance. The proposed intentional rerouting algorithm, namely, Intentional Move To Vacant Shorter Path (I-MTVSP) initiates the rerouting procedure when a connection leaves and its lightpath is hence released. Already established lightpaths that can be set up on a new vacant shorter path are selected to be rerouted. An existing lightpath can be rerouted only once during its life period, so as to reduce the service disruption period due to rerouting. Simulation results show that our proposed intentional lightpath rerouting algorithm improves significantly the rejection ratio when keeping a short service disruption period.
{"title":"A new intentional lightpath rerouting scheme for dynamic traffic in WDM all-optical networks","authors":"N. Amdouni, M. Koubàa, T. Aguili","doi":"10.1109/ICTEL.2013.6632110","DOIUrl":"https://doi.org/10.1109/ICTEL.2013.6632110","url":null,"abstract":"One limitation of a WDM all-optical network is the wavelength continuity constraint imposed by the all-optical cross-connect switches which do not allow a circuit to be placed on a non wavelength-continuous route. This constraint leads to inefficient utilization of wavelength channels and results in higher blocking probability. Rerouting is an effective approach that can increase the efficiency. In this paper, we employ intentional rerouting approach to improve the network utilization efficiency under dynamic traffic model. Intentional lightpath rerouting is to intentionally reroute already established lightpaths during their life period without affecting other existing lightpaths, so as to achieve a better blocking performance. The proposed intentional rerouting algorithm, namely, Intentional Move To Vacant Shorter Path (I-MTVSP) initiates the rerouting procedure when a connection leaves and its lightpath is hence released. Already established lightpaths that can be set up on a new vacant shorter path are selected to be rerouted. An existing lightpath can be rerouted only once during its life period, so as to reduce the service disruption period due to rerouting. Simulation results show that our proposed intentional lightpath rerouting algorithm improves significantly the rejection ratio when keeping a short service disruption period.","PeriodicalId":430600,"journal":{"name":"ICT 2013","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126295625","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}
Pub Date : 2013-05-06DOI: 10.1109/ICTEL.2013.6632105
Asma Mejri, G. R. Othman
Research works shed considerable light on the merit of the Physical Layer Network Coding in the Two-Way Relay Channel using lattice codes. This potential is proved under a capacity achieving perspective. However, it is not completely understood if this promised gain is attainable in practical settings. We try in this work to answer to this issue by investigating two network coding strategies: the Compute-and-Forward and the Analog Network Coding. We analyze end-to-end communication using these methods and evaluate their performance in terms of error rate and exchange rate using a low-complexity lattice encoding scheme.
{"title":"Bidirectional relaying via network coding: Design algorithm and performance evaluation","authors":"Asma Mejri, G. R. Othman","doi":"10.1109/ICTEL.2013.6632105","DOIUrl":"https://doi.org/10.1109/ICTEL.2013.6632105","url":null,"abstract":"Research works shed considerable light on the merit of the Physical Layer Network Coding in the Two-Way Relay Channel using lattice codes. This potential is proved under a capacity achieving perspective. However, it is not completely understood if this promised gain is attainable in practical settings. We try in this work to answer to this issue by investigating two network coding strategies: the Compute-and-Forward and the Analog Network Coding. We analyze end-to-end communication using these methods and evaluate their performance in terms of error rate and exchange rate using a low-complexity lattice encoding scheme.","PeriodicalId":430600,"journal":{"name":"ICT 2013","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116153191","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}
Pub Date : 2013-05-06DOI: 10.1109/ICTEL.2013.6632133
R. Fritzsche, Gregor Schulzig, G. Fettweis
In this work we consider a multi-user multiple-input-multiple-output downlink system with linear precoding at the base station (BS). Both, BS and user equipments (UEs) employ multiple antennas, where the number of parallel data streams exceeds the number of UE antennas. Hence, inter-stream interference cannot be handled at the UE side only. For that purpose linear precoding is employed at the BS side. In order to maximize the achievable user rate, it can be beneficial to shift a part of the interference suppression to the UE side, where knowledge of the precoded channel is required for receive filtering, successive interference cancellation and coherent detection. For making the precoded channel available at the UEs, we investigate the strategies of precoded reference signals (PRS) and precoded channel forwarding (PCF). The performances is compared w.r.t the effective rate, which combines the achievable rate for payload data as well as the loss for signaling the precoded channel. We found that PRS outperforms PCF as soon as the channel is only imperfectly available at the BS side.
{"title":"Forward signaling strategies for MU-MIMO downlink transmission","authors":"R. Fritzsche, Gregor Schulzig, G. Fettweis","doi":"10.1109/ICTEL.2013.6632133","DOIUrl":"https://doi.org/10.1109/ICTEL.2013.6632133","url":null,"abstract":"In this work we consider a multi-user multiple-input-multiple-output downlink system with linear precoding at the base station (BS). Both, BS and user equipments (UEs) employ multiple antennas, where the number of parallel data streams exceeds the number of UE antennas. Hence, inter-stream interference cannot be handled at the UE side only. For that purpose linear precoding is employed at the BS side. In order to maximize the achievable user rate, it can be beneficial to shift a part of the interference suppression to the UE side, where knowledge of the precoded channel is required for receive filtering, successive interference cancellation and coherent detection. For making the precoded channel available at the UEs, we investigate the strategies of precoded reference signals (PRS) and precoded channel forwarding (PCF). The performances is compared w.r.t the effective rate, which combines the achievable rate for payload data as well as the loss for signaling the precoded channel. We found that PRS outperforms PCF as soon as the channel is only imperfectly available at the BS side.","PeriodicalId":430600,"journal":{"name":"ICT 2013","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122697818","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}
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