8th International Conference on Cognitive Radio Oriented Wireless Networks最新文献_第3页

RF-aware widely-linear beamforming and null-steering in cognitive Radio transmitters 认知无线电发射机中射频感知的宽线性波束形成与零导向

8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.1109/CROWNCOM.2013.6636813

Aki Hakkarainen, J. Werner, K. Dandekar, M. Valkama

{"title":"RF-aware widely-linear beamforming and null-steering in cognitive Radio transmitters","authors":"Aki Hakkarainen, J. Werner, K. Dandekar, M. Valkama","doi":"10.1109/CROWNCOM.2013.6636813","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2013.6636813","url":null,"abstract":"Protection of the primary users (PUs) from interference stemming from secondary user (SU) transmissions is one of the key issues in dynamic cognitive radio systems. Assuming elementary direction of arrival (DOA) or location estimation of PU devices can be carried out in the SU devices, appropriate directional transmission utilizing e.g. antenna arrays and null-steering can then be deployed to avoid interference by steering nulls towards the PUs. In this paper, we study such transmitter digital beamforming and null-steering under practical limitations of the associated radio frequency (RF) circuits, namely the amplitude and phase mismatches between the in-phase and quadrature (I/Q) rails of the parallel up-conversion chains. Closed-form analysis of the available beamforming and null-steering capabilities is first provided, showing that the transmitter null-steering capabilities are heavily degraded due to RF circuit imperfections. Motivated by this, we will then propose and formulate a widely-linear (WL) digital beamforming and null-steering solution which is shown to efficiently suppress the RF circuit imperfection effects from the radiation pattern. Based on the obtained results, the developed solution can provide efficient null-steering and interference suppression characteristics, despite of the imperfections in the RF circuits, and can thus enable, e.g., the use of cost-efficient RF chains in the SU transmitters.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126408479","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

Optimizing scanning strategies: Selecting scanning bandwidth in adversarial RF environments 优化扫描策略:在对抗射频环境中选择扫描带宽

8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252019

A. Garnaev, W. Trappe, C. Kung

{"title":"Optimizing scanning strategies: Selecting scanning bandwidth in adversarial RF environments","authors":"A. Garnaev, W. Trappe, C. Kung","doi":"10.4108/icst.crowncom.2013.252019","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252019","url":null,"abstract":"In this paper we investigate the problem of designing a spectrum scanning strategy to detect an intelligent Invader who wants to utilize spectrum undetected for his/her unapproved purposes. To deal with this problem we apply game-theoretical tools. We model the situation as a game between a Scanner and an Invader where the Invader faces a dilemma: the more bandwidth the Invader attempts to use leads to a larger payoff if he is not detected, but at the same time also increases the probability of being detected and thus fined. Similarly, the Scanner faces a dilemma: the wider the bandwidth scanned, the higher the probability of detecting the Invader, but at the expense of increasing the cost of building the scanning system. The equilibrium strategies are found explicitly and reveal interesting properties. In particular, we have found a discontinuous dependence of the equilibrium strategies on the network parameters, fine and the type of the Invader's award. This discontinuity on fine means that the network provider has to take into account a human factor since some threshold values of fine could be very sensible for the Invader, while in other situations simply increasing the fine has minimal deterrence impact. Also we show how different reward types for the Invader (e.g. motivated by using different type of application, say, video-streaming or downloading files) can be incorporated into scanning strategy to increase its efficiency.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"156 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127363835","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: 25

On the use of POMDP for spectrum selection in cognitive Radio networks 认知无线电网络中使用POMDP进行频谱选择的研究

8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.251983

A. Raschellà, J. Pérez-Romero, O. Sallent, A. Umbert

{"title":"On the use of POMDP for spectrum selection in cognitive Radio networks","authors":"A. Raschellà, J. Pérez-Romero, O. Sallent, A. Umbert","doi":"10.4108/icst.crowncom.2013.251983","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.251983","url":null,"abstract":"Dynamic Spectrum Access is a key capability of Cognitive Radio (CR) networks to increase the efficiency in the use of the available spectrum resources. In this respect, this paper focuses on the spectrum selection problem when a number of radio links has to be established in a CR network to support applications with different bit rate requirements. A novel strategy based on a Partially Observable Markov Decision Process (POMDP) is proposed, whose target is to maximize a reward function that reflects the suitability of the available spectrum blocks to the application requirements. The proposed strategy combines partial observations of the interference state in the different spectrum blocks together with a statistical characterization of the interference dynamics. Thanks to this feature, the performance comparison of the algorithm against different reference strategies reveals that it achieves a very similar performance than a strategy operating under full knowledge of the real interference state of all the spectrum blocks, while at the same time it has much less requirements in terms of measurement needs and associated signaling.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"95 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134097472","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: 13

Detecting multi-channel wireless microphone user emulation attacks in white space with noise 检测多通道无线麦克风用户仿真攻击的白色空间噪声

8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/cogcom.1.1.e4

Dan Shan, K. Zeng, Weidong Xiang, P. Richardson

{"title":"Detecting multi-channel wireless microphone user emulation attacks in white space with noise","authors":"Dan Shan, K. Zeng, Weidong Xiang, P. Richardson","doi":"10.4108/cogcom.1.1.e4","DOIUrl":"https://doi.org/10.4108/cogcom.1.1.e4","url":null,"abstract":"In this work, we study a special kind of primary user emulation (PUE) attack, named wireless microphone user emulation (WMUE) attack in white space cognitive radio networks. In WMUE attacks, a malicious user emulates wireless microphone (WM) signals in order to block secondary users. Existing work on WMUE attack detection deals with single channel senario. Although multi-channel WM (MCWM) systems are common, detecting WMUE attacks under a multi-channel setting in noisy environments has not been well studied and the existing solution for single channel case cannot be directly applied. In a practical multi-channel WM system, the audio signals on different channels mix with each other and are contaminated by noises, which introduce great challenges on WMUE attack detection. We propose a novel multi-channel WMUE attack detection scheme which is based on the crosscorrelation between the demodulated FM signal and the acoustic signal. The audio interferences, audio noises, and RF noises are all resisted by the cross-correlation. To reduce computation complexity, we propose a 1.5-bit FM demodulator whose outputs are represented by only 0, 1 and -1. Moreover, we set up a MCWM system and developed a hardware based prototype to evaluate the performance of the proposed scheme. Experimental results show that, the proposed scheme can effectively detect multi-channel WMUE attacks within 0.25 second with detection rate larger than 0.9 and false alarm rate lower than 0.1 under low signal-to-noise ratios.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"122 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134393196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Design of a TV white space converter prototype towards cognitive radio for WLAN routers 面向无线局域网路由器认知无线电的电视白空间转换器原型设计

8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252073

I. Subbiah, M. Schrey, A. Ashok, G. Varga, Andreas Achtzehn, M. Petrova, S. Heinen

引用次数: 14

Law governed peer-to-peer secondary spectrum marketplaces 法律管辖点对点二级频谱市场

8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252020

Rishabh Dudheria, W. Trappe, N. Minsky

{"title":"Law governed peer-to-peer secondary spectrum marketplaces","authors":"Rishabh Dudheria, W. Trappe, N. Minsky","doi":"10.4108/icst.crowncom.2013.252020","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252020","url":null,"abstract":"We describe a decentralized peer-to-peer online secondary spectrum marketplace, where consumers can trade exclusive access rights to a specific portion of the spectrum (designated by geographic location, frequency band and time period) in return for fee payment, under the constraint of obeying the trading rules formulated by the government. The main advantage of such an innovative secondary spectrum marketplace over the current state of the art is that it reduces the complexity of spectrum management by removing governmental agencies from being directly involved in the completion of such transactions. The proposed model allows spectrum consumers to sell, lease or transfer the access rights to a chunk of spectrum by disaggregating, partitioning or time-sharing the corresponding spectrum in their possession. Further, we also outline an architecture in which such exclusive access rights to a portion of the spectrum could be used to regulate radio device transmission to enable proactive enforcement of the spectrum usage policies and to deter unauthorized transmissions. Overall our secondary spectrum marketplace model has the potential to reduce cost, increase spectrum efficiency, and to simplify the task of spectrum management.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127308912","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

Cross-layer performance analysis for cognitive radio network with a random transmission protocol in presence of sensing errors 感知误差下随机传输协议认知无线网络的跨层性能分析

8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252013

S. Tanzil, Md. Jahangir Hossain

引用次数: 0

Whether and when to share: Spectrum sensing as an evolutionary game 是否和何时分享:频谱感知作为一种进化游戏

8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.251938

Ying Dai, Jie Wu

{"title":"Whether and when to share: Spectrum sensing as an evolutionary game","authors":"Ying Dai, Jie Wu","doi":"10.4108/icst.crowncom.2013.251938","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.251938","url":null,"abstract":"Cooperative spectrum sensing is an efficient sensing scheme for cognitive radio networks (CRNs), in which secondary users (SUs) share sensing results with other SUs to improve the overall sensing performance. For a single SU, if the sensing results are shared early, there is more time for data transmission, which improves the throughput. In cases with multiple SUs sending early sensing results, it is more likely that the sensing results will be sent simultaneously over the same signaling channel. In this situation, the conflicts that occur affect both the sensing performance and throughput. For this situation, importance of when to share is taken into account, for which we have modeled spectrum sensing as an evolutionary game. The strategy set for each player in our game model contains not only whether to share its sensing results, but also when to share. The payoff of each player is defined based on the throughput, which considers the influence of the time spent both on sensing and sharing. We prove the existence of the evolutionarily stable strategy (ESS). In addition, we propose a practical algorithm for each secondary user to converge at the ESS. We conduct experiments on our GNU/USRP testbed. The experimental results verify for our model, including the convergence to the ESS.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129968145","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: 5

Modified MUSIC algorithm for doa estimation using CRLH leaky-wave antennas 基于CRLH漏波天线的doa估计改进MUSIC算法

8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252041

H. Paaso, A. Mämmelä, D. Patron, K. Dandekar

引用次数: 17

Dynamic subchannel and power allocation using Nash Bargaining game for cognitive radio networks with imperfect PU activity sensing 基于纳什议价博弈的不完全PU活动感知认知无线网络动态子信道和功率分配

8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252683

A. Baharlouei, B. Jabbari

引用次数: 7