Pub Date : 2014-10-23DOI: 10.1109/ISWCS.2014.6933435
M. Rihan, M. Elsabrouty, O. Muta, Hiroshi Fumkawa
The deployment of femtocells in current and future communication systems promises an effective solution for limited indoor coverage problem and a possible gateway for mobile data offloading. In this paper, we cast a cognitive interference alignment approach (IA) suitable for heterogeneous cellular networks with a mixed macrocell and femtocell deployment Specifically, in our approach a restricted waterfilling (RWF) algorithm is used to maximize the downlink data rate, while reserving some eigenmodes for giving the femtocell basestations the opportunity to do their transmissions even at high signal-to-noise power ratio (SNR) for the macrocell basestation. Additionally, both the cross-tier and co-tier interference is to be aligned at each femtocell user's receiver using an Iterative Reweighted Least Squares(IRLS) algorithm. The simulation results show that the proposed IA approach provides an improved sum rate for the femtocell users, compared to the conventional IA techniques, like, the leakage minimization approach and the nuclear norm based rank constraint rank minimization approach.
{"title":"Iterative interference alignment in macrocell-femtocell networks: A cognitive radio approach","authors":"M. Rihan, M. Elsabrouty, O. Muta, Hiroshi Fumkawa","doi":"10.1109/ISWCS.2014.6933435","DOIUrl":"https://doi.org/10.1109/ISWCS.2014.6933435","url":null,"abstract":"The deployment of femtocells in current and future communication systems promises an effective solution for limited indoor coverage problem and a possible gateway for mobile data offloading. In this paper, we cast a cognitive interference alignment approach (IA) suitable for heterogeneous cellular networks with a mixed macrocell and femtocell deployment Specifically, in our approach a restricted waterfilling (RWF) algorithm is used to maximize the downlink data rate, while reserving some eigenmodes for giving the femtocell basestations the opportunity to do their transmissions even at high signal-to-noise power ratio (SNR) for the macrocell basestation. Additionally, both the cross-tier and co-tier interference is to be aligned at each femtocell user's receiver using an Iterative Reweighted Least Squares(IRLS) algorithm. The simulation results show that the proposed IA approach provides an improved sum rate for the femtocell users, compared to the conventional IA techniques, like, the leakage minimization approach and the nuclear norm based rank constraint rank minimization approach.","PeriodicalId":431852,"journal":{"name":"2014 11th International Symposium on Wireless Communications Systems (ISWCS)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132536844","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 : 2014-10-23DOI: 10.1109/ISWCS.2014.6933405
L. Blanco, M. Nájar
This paper addresses the problem of multiple relay selection in a two-hop wireless cooperative network. In particular, the proposed technique selects the best subset of relays, in a distributed beamforming scheme, which maximizes the signal-to-noise ratio at the destination node subject to individual power constraints at the relays. The selection of the best subset of K relays out of a set of N potential relay nodes, under individual power constraints, is a hard combinatorial problem with a high computational burden. The approach considered herein consists in relaxing this problem into a convex one by considering a sparsity-inducing norm. The method exposed in this paper is based on the knowledge of the second-order statistics of the channels and achieves a near-optimal performance with a computational burden which is far less than the one needed in the combinatorial search. Furthermore, in the proposed technique, contrary to other approaches in the literature, the relays are not limited to cooperate with full power.
{"title":"Subset relay selection in wireless cooperative networks using sparsity-inducing norms","authors":"L. Blanco, M. Nájar","doi":"10.1109/ISWCS.2014.6933405","DOIUrl":"https://doi.org/10.1109/ISWCS.2014.6933405","url":null,"abstract":"This paper addresses the problem of multiple relay selection in a two-hop wireless cooperative network. In particular, the proposed technique selects the best subset of relays, in a distributed beamforming scheme, which maximizes the signal-to-noise ratio at the destination node subject to individual power constraints at the relays. The selection of the best subset of K relays out of a set of N potential relay nodes, under individual power constraints, is a hard combinatorial problem with a high computational burden. The approach considered herein consists in relaxing this problem into a convex one by considering a sparsity-inducing norm. The method exposed in this paper is based on the knowledge of the second-order statistics of the channels and achieves a near-optimal performance with a computational burden which is far less than the one needed in the combinatorial search. Furthermore, in the proposed technique, contrary to other approaches in the literature, the relays are not limited to cooperate with full power.","PeriodicalId":431852,"journal":{"name":"2014 11th International Symposium on Wireless Communications Systems (ISWCS)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114681151","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 : 2014-10-23DOI: 10.1109/ISWCS.2014.6933357
Stanislav D. Markus, E. A. Mavrychev
In this paper a new maximum likelihood (ML) based detector for multi-input multi-output (MIMO) channels in spatio-temporal colored noise fields is proposed. It is assumed a Kronecker model of spatio-temporal correlation of noise. Approximate ML (AML) detection algorithm of MIMO channels is considered for two cases: known noise correlation matrix and unknown noise correlation matrix. The ML decoder for the case of unknown correlation matrix is developed based on iterative procedure with successive estimation of symbols, spatial correlation matrix and temporal correlation matrix. The proposed method uses the Kronecker structure of spatio-temporal correlation matrix. Effectiveness of the proposed technique is confirmed by simulation results.
{"title":"Approximate ML detector for MIMO channels in unknown spatio-temporal colored noise with Kronecker product correlation","authors":"Stanislav D. Markus, E. A. Mavrychev","doi":"10.1109/ISWCS.2014.6933357","DOIUrl":"https://doi.org/10.1109/ISWCS.2014.6933357","url":null,"abstract":"In this paper a new maximum likelihood (ML) based detector for multi-input multi-output (MIMO) channels in spatio-temporal colored noise fields is proposed. It is assumed a Kronecker model of spatio-temporal correlation of noise. Approximate ML (AML) detection algorithm of MIMO channels is considered for two cases: known noise correlation matrix and unknown noise correlation matrix. The ML decoder for the case of unknown correlation matrix is developed based on iterative procedure with successive estimation of symbols, spatial correlation matrix and temporal correlation matrix. The proposed method uses the Kronecker structure of spatio-temporal correlation matrix. Effectiveness of the proposed technique is confirmed by simulation results.","PeriodicalId":431852,"journal":{"name":"2014 11th International Symposium on Wireless Communications Systems (ISWCS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132370209","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 : 2014-10-23DOI: 10.1109/ISWCS.2014.6933339
M. Lanoiselée, Hao Lin
The PAPR issue has been identified as an important drawback of OFDM systems, which leads to a low energy efficiency in transmission. To overcome it, many PAPR reduction techniques have been studied; in this paper we propose a new method that provides already excellent results regards to state of the art and has also a high degree of flexibility for hardware implementation. This method relies on a Pre Constructed Temporal Signal algorithm, which can reduce the PAPR of an OFDM symbol by modifying the mapping of the subcarriers in a generalized manner. This process can be applied for current standards without any implementation difficulties for FFT sizes up to 8K; it could also be applied without any signal disturbance for future standards using any constellation orders.
{"title":"A powerful and real time PAPR reduction process for energy efficiency improvement in OFDM communication systems","authors":"M. Lanoiselée, Hao Lin","doi":"10.1109/ISWCS.2014.6933339","DOIUrl":"https://doi.org/10.1109/ISWCS.2014.6933339","url":null,"abstract":"The PAPR issue has been identified as an important drawback of OFDM systems, which leads to a low energy efficiency in transmission. To overcome it, many PAPR reduction techniques have been studied; in this paper we propose a new method that provides already excellent results regards to state of the art and has also a high degree of flexibility for hardware implementation. This method relies on a Pre Constructed Temporal Signal algorithm, which can reduce the PAPR of an OFDM symbol by modifying the mapping of the subcarriers in a generalized manner. This process can be applied for current standards without any implementation difficulties for FFT sizes up to 8K; it could also be applied without any signal disturbance for future standards using any constellation orders.","PeriodicalId":431852,"journal":{"name":"2014 11th International Symposium on Wireless Communications Systems (ISWCS)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121957179","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 : 2014-10-23DOI: 10.1109/ISWCS.2014.6933481
Van-Giang Nguyen, Young Han Kim
The mobile network plays an important role in the evolution of humanity and society. However, due to the increase of users as well as of mobile applications, the current mobile network architecture faces many challenges. In this paper we describe V-Core, a new architecture for the mobile packet core network which is based on Software Defined Networking and Network Function Virtualization. Then, we introduce a MobileVisor which is a machine to slice the above mobile packet core network into different control platforms according to either different mobile operators or different technologies (e.g. 3G or 4G). With our architecture, the mobile network operators can reduce their costs for deployment and operation as well as use network resources efficiently.
{"title":"Slicing the next mobile packet core network","authors":"Van-Giang Nguyen, Young Han Kim","doi":"10.1109/ISWCS.2014.6933481","DOIUrl":"https://doi.org/10.1109/ISWCS.2014.6933481","url":null,"abstract":"The mobile network plays an important role in the evolution of humanity and society. However, due to the increase of users as well as of mobile applications, the current mobile network architecture faces many challenges. In this paper we describe V-Core, a new architecture for the mobile packet core network which is based on Software Defined Networking and Network Function Virtualization. Then, we introduce a MobileVisor which is a machine to slice the above mobile packet core network into different control platforms according to either different mobile operators or different technologies (e.g. 3G or 4G). With our architecture, the mobile network operators can reduce their costs for deployment and operation as well as use network resources efficiently.","PeriodicalId":431852,"journal":{"name":"2014 11th International Symposium on Wireless Communications Systems (ISWCS)","volume":"235 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124903542","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 : 2014-10-23DOI: 10.1109/ISWCS.2014.6933456
Jianyuan Feng, Meng Yinxia, Pingyang Wang, Xing Zhang, Wenbo Wang
Energy harvesting is becoming a promising technology for future wireless communication network for its potential of saving nonrenewable energy and making the communication environmentally friendly. However, due to the unpredictable and intermittent nature of energy source, the road to the communication system powered solely by harvested energy is plagued with potholes. In this paper, we consider a heterogeneous network consisting of one macro base station (BS) powered with power grid and one small BS powered by both harvested and grid energy over a given time period (e.g. 24 hours), using statistical information of harvested energy. Then we study the resource allocation problem to minimize the power grid input while satisfying users' quality of service (outage probability) requirements, where dynamic programming (DP) algorithm is proposed to analyze the outage probability and solve the problem. The simulation results show that the DP algorithm can greatly reduce the grid power consumption compared with current heuristic methods. There is also an interesting observation of our results that the amount of harvested energy have no impact on the optimum resource allocation strategies.
{"title":"Energy-aware resource allocation with energy harvesting in heterogeneous wireless network","authors":"Jianyuan Feng, Meng Yinxia, Pingyang Wang, Xing Zhang, Wenbo Wang","doi":"10.1109/ISWCS.2014.6933456","DOIUrl":"https://doi.org/10.1109/ISWCS.2014.6933456","url":null,"abstract":"Energy harvesting is becoming a promising technology for future wireless communication network for its potential of saving nonrenewable energy and making the communication environmentally friendly. However, due to the unpredictable and intermittent nature of energy source, the road to the communication system powered solely by harvested energy is plagued with potholes. In this paper, we consider a heterogeneous network consisting of one macro base station (BS) powered with power grid and one small BS powered by both harvested and grid energy over a given time period (e.g. 24 hours), using statistical information of harvested energy. Then we study the resource allocation problem to minimize the power grid input while satisfying users' quality of service (outage probability) requirements, where dynamic programming (DP) algorithm is proposed to analyze the outage probability and solve the problem. The simulation results show that the DP algorithm can greatly reduce the grid power consumption compared with current heuristic methods. There is also an interesting observation of our results that the amount of harvested energy have no impact on the optimum resource allocation strategies.","PeriodicalId":431852,"journal":{"name":"2014 11th International Symposium on Wireless Communications Systems (ISWCS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125402891","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 : 2014-10-23DOI: 10.1109/ISWCS.2014.6933408
Hongnian Xing, M. Renfors
Device-to-Device communication has been a hot research topic in the recent years. Among different D2D use cases, the integration of D2D and conventional cellular network is one of the most attractive schemes. This approach has been investigated in recent academic and standardization studies, since such a combination improves the efficiency of the overall system in both resource and power domains. It also improves the coverage of the cellular network and improves the cell edge performance. In this paper, such a system combining D2D and OFDMA/SC-FDMA based cellular network is investigated. The D2D integrated OFDMA system performance is investigated, emphasizing the interference analysis. Besides, a filter bank based multicarrier (FBMC) scheme is introduced for the D2D integrated system for the purpose of interference reduction.
{"title":"Investigation of filter bank based device-to-device communication integrated into OFDMA cellular system","authors":"Hongnian Xing, M. Renfors","doi":"10.1109/ISWCS.2014.6933408","DOIUrl":"https://doi.org/10.1109/ISWCS.2014.6933408","url":null,"abstract":"Device-to-Device communication has been a hot research topic in the recent years. Among different D2D use cases, the integration of D2D and conventional cellular network is one of the most attractive schemes. This approach has been investigated in recent academic and standardization studies, since such a combination improves the efficiency of the overall system in both resource and power domains. It also improves the coverage of the cellular network and improves the cell edge performance. In this paper, such a system combining D2D and OFDMA/SC-FDMA based cellular network is investigated. The D2D integrated OFDMA system performance is investigated, emphasizing the interference analysis. Besides, a filter bank based multicarrier (FBMC) scheme is introduced for the D2D integrated system for the purpose of interference reduction.","PeriodicalId":431852,"journal":{"name":"2014 11th International Symposium on Wireless Communications Systems (ISWCS)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129679490","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 : 2014-10-23DOI: 10.1109/ISWCS.2014.6933401
M. El-Absi, M. Shaat, F. Bader, T. Kaiser
Interference alignment (IA) has been proposed to optimally manage the interference aiming at providing the maximum degrees of freedom for multiuser interference channels. Therefore, IA has been used in cognitive radio (CR) systems to perform resource management in order to improve the throughput of the OFDM/FBMC based MIMO CR systems. In this work, a sub-optimal IA based power loading method is proposed for OFDM/FBMC based MIMO CR systems to approach the optimal approach with fewer complexity. In the proposed algorithm, all secondary users are enabled to share the available spectrum on the base of IA technique without affecting the quality-of-service of the primary system. Furthermore, spectral efficiency comparison between MIMO-OFDM and MIMO-FBMC is presented. Simulation results show that IA based power loading achieves a significant sum-rate increase of CR systems compared to traditional orthogonal multiple access techniques. Additionally, IA based power loading achieves better sum-rate improvement with FBMC than OFDM physical layer.
{"title":"Power loading and spectral efficiency comparison of MIMO OFDM/FBMC for interference alignment based cognitive radio systems","authors":"M. El-Absi, M. Shaat, F. Bader, T. Kaiser","doi":"10.1109/ISWCS.2014.6933401","DOIUrl":"https://doi.org/10.1109/ISWCS.2014.6933401","url":null,"abstract":"Interference alignment (IA) has been proposed to optimally manage the interference aiming at providing the maximum degrees of freedom for multiuser interference channels. Therefore, IA has been used in cognitive radio (CR) systems to perform resource management in order to improve the throughput of the OFDM/FBMC based MIMO CR systems. In this work, a sub-optimal IA based power loading method is proposed for OFDM/FBMC based MIMO CR systems to approach the optimal approach with fewer complexity. In the proposed algorithm, all secondary users are enabled to share the available spectrum on the base of IA technique without affecting the quality-of-service of the primary system. Furthermore, spectral efficiency comparison between MIMO-OFDM and MIMO-FBMC is presented. Simulation results show that IA based power loading achieves a significant sum-rate increase of CR systems compared to traditional orthogonal multiple access techniques. Additionally, IA based power loading achieves better sum-rate improvement with FBMC than OFDM physical layer.","PeriodicalId":431852,"journal":{"name":"2014 11th International Symposium on Wireless Communications Systems (ISWCS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128882501","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 : 2014-10-23DOI: 10.1109/ISWCS.2014.6933473
O. Banimelhem, M. Mowafi, E. Taqieddin, F. Awad, Manar Al Rawabdeh
Node clustering in wireless sensor networks helps in extending the network life time by reducing the nodes' communication energy and balancing their remaining energy. This paper presents a new genetic-based approach that improves the performance of the LEACH clustering protocol used in wireless sensor networks. The proposed approach utilizes the mobility feature of sensor nodes in order to reduce the communication distances between the cluster heads and the base station. In each round, new locations of the cluster heads are determined using a genetic algorithm. The simulation results demonstrate that the proposed approach outperforms LEACH in terms of network lifetime and average remaining energy.
{"title":"An efficient clustering approach using genetic algorithm and node mobility in wireless sensor networks","authors":"O. Banimelhem, M. Mowafi, E. Taqieddin, F. Awad, Manar Al Rawabdeh","doi":"10.1109/ISWCS.2014.6933473","DOIUrl":"https://doi.org/10.1109/ISWCS.2014.6933473","url":null,"abstract":"Node clustering in wireless sensor networks helps in extending the network life time by reducing the nodes' communication energy and balancing their remaining energy. This paper presents a new genetic-based approach that improves the performance of the LEACH clustering protocol used in wireless sensor networks. The proposed approach utilizes the mobility feature of sensor nodes in order to reduce the communication distances between the cluster heads and the base station. In each round, new locations of the cluster heads are determined using a genetic algorithm. The simulation results demonstrate that the proposed approach outperforms LEACH in terms of network lifetime and average remaining energy.","PeriodicalId":431852,"journal":{"name":"2014 11th International Symposium on Wireless Communications Systems (ISWCS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128979759","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 : 2014-10-23DOI: 10.1109/ISWCS.2014.6933492
R. T. Duran, Paschalis Tsiaflakis, L. Vandendorpe, M. Moonen
To cope with the dramatic increase in mobile data traffic, the widespread deployment of base stations constitutes a promising solution. However, it also causes high levels of interference, especially at the cell-edges. Most interference management techniques assume coordination between base stations, which involves undesired overhead and delays. To tackle this problem, we propose a neighbor-friendly autonomous algorithm for power spectrum allocation in wireless OFDM networks that protects victim users from neighboring cells through a penalty factor in the power allocation level. We refer to it as the neighbor-friendly iterative waterfilling (NF-IWF) algorithm. In high interference scenarios, it can achieve a victim user data rate increase by a factor of 3.5 compared to IWF and 60 compared to equal power allocation with a marginal decrease of the primary user data rate.
{"title":"Neighbor-friendly autonomous algorithm for power spectrum allocation in OFDM networks","authors":"R. T. Duran, Paschalis Tsiaflakis, L. Vandendorpe, M. Moonen","doi":"10.1109/ISWCS.2014.6933492","DOIUrl":"https://doi.org/10.1109/ISWCS.2014.6933492","url":null,"abstract":"To cope with the dramatic increase in mobile data traffic, the widespread deployment of base stations constitutes a promising solution. However, it also causes high levels of interference, especially at the cell-edges. Most interference management techniques assume coordination between base stations, which involves undesired overhead and delays. To tackle this problem, we propose a neighbor-friendly autonomous algorithm for power spectrum allocation in wireless OFDM networks that protects victim users from neighboring cells through a penalty factor in the power allocation level. We refer to it as the neighbor-friendly iterative waterfilling (NF-IWF) algorithm. In high interference scenarios, it can achieve a victim user data rate increase by a factor of 3.5 compared to IWF and 60 compared to equal power allocation with a marginal decrease of the primary user data rate.","PeriodicalId":431852,"journal":{"name":"2014 11th International Symposium on Wireless Communications Systems (ISWCS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128994226","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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