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8th International Conference on Cognitive Radio Oriented Wireless Networks最新文献

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Dataflow modeling and design for cognitive radio networks 认知无线网络的数据流建模与设计
8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252125
Lai-Huei Wang, S. Bhattacharyya, Aida Vosoughi, Joseph R. Cavallaro, M. Juntti, J. Boutellier, O. Silvén, M. Valkama
{"title":"Dataflow modeling and design for cognitive radio networks","authors":"Lai-Huei Wang, S. Bhattacharyya, Aida Vosoughi, Joseph R. Cavallaro, M. Juntti, J. Boutellier, O. Silvén, M. Valkama","doi":"10.4108/icst.crowncom.2013.252125","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252125","url":null,"abstract":"Cognitive radio networks present challenges at many levels of design including configuration, control, and cross-layer optimization. In this paper, we focus primarily on dataflow representations to enable flexibility and reconfigurability in many of the baseband algorithms. Dataflow modeling will be important to provide a layer of abstraction and will be applied to generate flexible baseband representations for cognitive radio testbeds, including the Rice WARP platform. As RF frequency agility and reconfiguration for carrier aggregation are important goals for 4G LTE Advanced systems, we also focus on dataflow analysis for digital predistortion algorithms. A new design method called parameterized multidimensional design hierarchy mapping (PMDHM) is presented, along with initial speedup results from applying PMDHM in the mapping of channel estimation onto a GPU architecture.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"103 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":"115864630","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
Coopetition spectrum trading — Creating endogenous spectrum holes 合作频谱交易——制造内生频谱漏洞
8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252891
Liu Cui, T. Znati, M. Weiss
{"title":"Coopetition spectrum trading — Creating endogenous spectrum holes","authors":"Liu Cui, T. Znati, M. Weiss","doi":"10.4108/icst.crowncom.2013.252891","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252891","url":null,"abstract":"Dynamic spectrum access is an important way to alleviate the spectrum scarcity. Traditionally, secondary users are allowed to opportunistically operate when primary users are absent and buy idle bands from primary users. Although it improves the spectrum utility to some extents, it is not enough. In this paper, we argue that spectrum hole should be endogenous which means they should be negotiated by primary and secondary users. We proposed a novel spectrum sharing scheme with spectrum usage and management right. Further, we suggest spectrum trading as a financial option to capture the realistic usage and increase the trading flexibility. We show the superior of our model for primary users in deterministic and dynamic leasing environments.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"84 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":"128110907","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
Performance of transmit beamforming for interference mitigation with random codebooks 随机码本干扰抑制的发射波束形成性能
8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252162
A. Dowhuszko, Jyri Hämäläinen, A. Elsherif, Z. Ding
{"title":"Performance of transmit beamforming for interference mitigation with random codebooks","authors":"A. Dowhuszko, Jyri Hämäläinen, A. Elsherif, Z. Ding","doi":"10.4108/icst.crowncom.2013.252162","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252162","url":null,"abstract":"In this paper, we study the interference mitigation capability of Transmit Beamforming (TBF) when used to combat cross-layer interference in a two-tier Heterogeneous Network (Het-Net) scenario. Since generic practical codebook designs are not known when TBF is applied for interference mitigation purposes, a randomly generated codebook is used as a simple way to provide a lower bound performance for any efficient (deterministic) codebook design. Closed-form expressions for the rate performance are derived when altruistic TBF is applied to mitigate interference with different number of transmit antennas and feedback bit resolutions. Our analysis reveals that the use of additional feedback bits has potential to provide more performance gain at lower outage probability regimes (when compared to higher outage probability ones). In addition, for random codebooks with a fixed number of feedback bits, the number of transmit antennas does not have a notable effect on the interference mitigation capability of an altruistic TBF scheme.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"53 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":"132524558","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
Linearly combined signal energy based spectrum sensing algorithm for cognitive radio networks with noise variance uncertainty 噪声方差不确定认知无线电网络中基于线性组合信号能量的频谱感知算法
8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252127
T. E. Bogale, L. Vandendorpe
{"title":"Linearly combined signal energy based spectrum sensing algorithm for cognitive radio networks with noise variance uncertainty","authors":"T. E. Bogale, L. Vandendorpe","doi":"10.4108/icst.crowncom.2013.252127","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252127","url":null,"abstract":"This paper proposes novel and simple lineary combined signal energy based spectrum sensing algorithm for cognitive radio networks. It is assumed that the transmitter pulse shaping filter is known to the cognitive receiver. And, flat fading channels with synchronous and asynchronous receiver scenarios are considered. For each of these scenarios, the proposed detector is explained as follows: First, by introducing a combiner vector over-sampled signals with total duration equal to the symbol period are combined linearly. Second, for this combined signal the Signal-to-Noise ratio (SNR) maximization and minimization problems are formulated as Rayleigh quotient optimization problems. Third, by using the solutions of these problems, the ratio of the energy of the combined signals corresponding to the maximum and minimum SNRs are proposed as the test statistics For these test statistics, analytical probability of false alarm (Pf) and probability of detection (Pd) expressions are derived for additive white Gaussian noise (AWGN) channel. It is shown that these detectors are robust against noise variance uncertainty Moreover, simulation results demonstrate that the proposed detectors achieve better detection performance compared to tha of the well known energy detector in AWGN and Rayleigh fading channels with noise variance uncertainty. The proposed detectors also guarantee the prescribed Pf(Pd) in the presence of adjacent channel interference signals.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"37 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":"127219488","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: 16
Reciprocity inspired learning for opportunistic spectrum access in cognitive radio networks 互易性激发了认知无线电网络中机会频谱接入的学习
8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252895
Xianfu Chen, Tao Chen, Wei Cheng, Honggang Zhang
{"title":"Reciprocity inspired learning for opportunistic spectrum access in cognitive radio networks","authors":"Xianfu Chen, Tao Chen, Wei Cheng, Honggang Zhang","doi":"10.4108/icst.crowncom.2013.252895","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252895","url":null,"abstract":"This paper addresses opportunistic spectrum access (OSA) in non-cooperative cognitive radio networks (CRNs). The selfish behaviors of the secondary users (SUs) will cause a CRN to collapse. The SUs are thus enabled to build beliefs about how other SUs would respond to their decision makings. The interaction among the SUs is modeled as a stochastic learning process. In this way, each SU can independently learn the behaviors of the competitors, optimize the OSA strategies, and finally achieve the goal of reciprocity. Two learning algorithms are proposed to stabilize the stochastic CRNs, the convergence properties of which are also proven theoretically. Simulation results validate the performance of the proposed results, and show that the achieved system performance outperforms some existing protocols.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"2009 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":"125654086","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 control in cognitive wireless networks by tuning the carrier sensing threshold 基于载波感知阈值的认知无线网络干扰控制
8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252082
Byungjin Cho, K. Koufos, R. Jäntti
{"title":"Interference control in cognitive wireless networks by tuning the carrier sensing threshold","authors":"Byungjin Cho, K. Koufos, R. Jäntti","doi":"10.4108/icst.crowncom.2013.252082","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252082","url":null,"abstract":"The requirement for secondary spectrum usage is the control of secondary generated interference to the primary system. The generated interference from different types of secondary networks can be controlled by adjusting different parameters. The carrier sensing threshold can be used as a common parameter to control the density of active secondary users in wireless networks with contention control thereby enabling primary system protection. In this paper, we propose a method to set the carrier sensing threshold in secondary wireless networks with finite user density and finite deployment area. Based on the secondary user density, we first find the required distance separation among secondary transmitters so that the primary system service is protected. Given the distance separation, we set the carrier sensing threshold by computing the self-interference at a secondary user. Our method is illustrated for Matern type II and Matern type III point processes for modelling the locations of active secondary users due to the resemblance of these processes to CSMA/CA type of contention control.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"64 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":"123379540","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
Transmit and receive cooperative cognition: Protocol design and stability analysis 发送和接收合作认知:协议设计和稳定性分析
8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252072
A. Shafie, A. El-Keyi, T. Khattab, M. Nafie
{"title":"Transmit and receive cooperative cognition: Protocol design and stability analysis","authors":"A. Shafie, A. El-Keyi, T. Khattab, M. Nafie","doi":"10.4108/icst.crowncom.2013.252072","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252072","url":null,"abstract":"In this paper, we investigate the stability of a cooperative cognitive system. We propose a cooperative secondary transmitter-receiver system (CSTR), where, the secondary transmitter (ST) and the secondary receiver (SR) increase the spectrum availability for the ST packets by relaying the unsuccessfully transmitted packets of the primary transmitter (PT). We assume receiving nodes with multipacket reception capability (MPR). We provide two inner bounds and two outer bounds on the stability region of the considered system.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"264 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":"116821511","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
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