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Optimal Detector Randomization in Cognitive Radio Systems in the Presence of Imperfect Sensing Decisions

Ahmet Dundar Sezer, Sinan Gezici, Mustafa Cenk Gursoy
2014 IEEE Communications Letters  
In this study, optimal detector randomization is developed for secondary users in a cognitive radio system in the presence of imperfect spectrum sensing decisions.  ...  Optimal MAP detectors and generic expressions for their average probability of error are derived in the presence of possible sensing errors.  ...  By noting that secondary users in cognitive radio systems experience non-Gaussian channels in practice due to imperfect sensing decisions, we propose the use of detector randomization for the design of  ... 
doi:10.1109/lcomm.2013.120713.132423 fatcat:zt6i6736dvdqvosts3zunelcei

Spectrum sensing via restricted Neyman-Pearson approach in the presence of non-Gaussian noise

Esma Turgut, Sinan Gezici
2013 Eurocon 2013  
In this paper, spectrum sensing in cognitive radio systems is studied for non-Gaussian channels in the presence of prior distribution uncertainty.  ...  In order to design optimal spectrum sensing algorithms in such cases, we propose to employ the restricted Neyman-Pearson (NP) approach, which maximizes the average detection probability under constraints  ...  Acknowledgments: The authors would like to thank Ryo Sawai and Ryota Kimura from Sony Corporation (Gotenyama Technology Center, Tokyo, Japan) for the useful comments.  ... 
doi:10.1109/eurocon.2013.6625210 dblp:conf/eurocon/TurgutG13 fatcat:nust3raguvek5nm6zwwjf57s6u

An Optimal Eigenvalue Based Spectrum Sensing Algorithm for Cognitive Radio

Gevira Omondi, Vitalis K. Oduol
2015 International journal for innovation education and research  
Various measurements of spectrum utilization have shown unused resources in frequency, time and space. Cognitive radio is a new concept of reusing licensed spectrum in an unlicensed manner.  ...  The unused resources are often referred to as spectrum holes or white spaces. These spectrum holes could be reused by cognitive radios, sometimes called secondary users.  ...  In MME detection, 4 receiving antennas are used for sensing in the radio environment while the optimal detector has a temporal smoothing factor of 16.  ... 
doi:10.31686/ijier.vol3.iss10.444 fatcat:kkowpfg2jjhbjp5koiil3c2fci

Overview of spectrum sensing for cognitive radio

Erik Axell, Geert Leus, Erik G. Larsson
2010 2010 2nd International Workshop on Cognitive Information Processing  
We present a survey of state-of-the-art algorithms for spectrum sensing in cognitive radio. The algorithms discussed range from energy detection to sophisticated feature detectors.  ...  In particular we treat detectors that exploit cyclostationarity properties of the signal, and detectors that exploit a known eigenvalue structure of the signal covariance matrix.  ...  Spectrum sensing is one of the most essential components of cognitive radio.  ... 
doi:10.1109/cip.2010.5604136 dblp:conf/cogip/AxellLL10 fatcat:bapkcmdnnfesphjctovc3upfve

Cooperative Shared Spectrum Sensing for Dynamic Cognitive Radio Networks

A. R. Biswas, T. C. Aysal, S. Kandeepan, D. Kliazovichz, R. Piesiewicz
2009 2009 IEEE International Conference on Communications  
Then a group of cognitive radios is assigned for sensing of a particular narrow subband.  ...  A cognitive base station is used for collecting the results and making the final decision over the full spectrum.  ...  ACKNOWLEDGMENTS The authors would like to thank the European Commission for funding the project under the Framework Program-7 (FP7) in the ICT cluster. EUWB (FP7-ICT-215669).  ... 
doi:10.1109/icc.2009.5198862 dblp:conf/icc/BiswasASKP09 fatcat:gjszpnmifbdarkcc47flwostti

Improved Double Threshold Energy Detection for Cooperative Spectrum Sensing in Cognitive Radio

Sanket Kalamkar, Adrish Banerjee
2013 Defence Science Journal  
CONCLUSION In this work, cooperative spectrum sensing with double threshold improved energy detection is studied. Two step optimization is performed to enhance the system performance.  ...  However, the sensing performance by a single SU may be degraded due to fading of the radio channels and shadowing effect 6 .  ... 
doi:10.14429/dsj.63.3761 fatcat:xdrgk7fi45bhbk5majevrakjza

Cognitive Radio Techniques Under Practical Imperfections: A Survey

Shree Krishna Sharma, Tadilo Endeshaw Bogale, Symeon Chatzinotas, Bjorn Ottersten, Long Bao Le, Xianbin Wang
2015 IEEE Communications Surveys and Tutorials  
the performance of a CR system.  ...  Cognitive Radio (CR) has been considered as a potential candidate for addressing the spectrum scarcity problem of future wireless networks.  ...  Most of these detectors fail to provide better sensing performance in the presence of noise correlation [35] .  ... 
doi:10.1109/comst.2015.2452414 fatcat:sks2f7fwpva47fi2zqskbthlxq

A survey of spectrum sensing algorithms for cognitive radio applications

Tevfik Yucek, Huseyin Arslan
2009 IEEE Communications Surveys and Tutorials  
The spectrum sensing problem has gained new aspects with cognitive radio and opportunistic spectrum access concepts. It is one of the most challenging issues in cognitive radio systems.  ...  In this paper, a survey of spectrum sensing methodologies for cognitive radio is presented.  ...  Random Hough transform of received signal is used in [94] for identifying the presence of radar pulses in the operating channels of IEEE 802.11 systems.  ... 
doi:10.1109/surv.2009.090109 fatcat:lq37fnncovdvnpv556yxwkrgd4

Human opinion dynamics-based optimisation for in-band spectrum sensing in cognitive radio networks

Roopali Garg, Nitin Saluja
2019 Journal of the National Science Foundation of Sri Lanka  
In cognitive radios, the primary user sensing plays an important role in defining a compromise between spectrum efficiency and licensed user interference.  ...  In this paper, the performance of cognitive radio is optimised using human opinion dynamics (HOD) inspired continuous opinion dynamics optimiser (CODO) with sensing parameters and throughput as arguments  ...  The average achievable throughput of the system is given by: Where P(H1) = 1 -P(H0) ; is probability of presence of PU in the sens sensing-throughput problem is to find an optimal sensing time that wi  ... 
doi:10.4038/jnsfsr.v47i4.9684 fatcat:vn2maijinjfkxb22iwgqdpwae4

Spectrum Sensing for Cognitive Radio : State-of-the-Art and Recent Advances

Erik Axell, Geert Leus, Erik Larsson, H. Poor
2012 IEEE Signal Processing Magazine  
ACKNOWLEDGMENTS The research leading to these results has received funding from the European Community's Seventh  ...  These two constraints are important in a cognitive radio system, since P FA is related to the throughput of the cognitive radio system, whereas P MD is related to the interference to the primary system  ...  In particular, the optimal voting rule, optimal local decision threshold, and minimal number of cognitive radios are derived, where optimality is defined in terms of the (unweighted) global probability  ... 
doi:10.1109/msp.2012.2183771 fatcat:oc3gy4uclveh3fqzvzcvlfwj5e

Error Rate Analysis of Cognitive Radio Transmissions with Imperfect Channel Sensing [article]

Gozde Ozcan, M. Cenk Gursoy, Sinan Gezici
2013 arXiv   pre-print
This paper studies the symbol error rate performance of cognitive radio transmissions in the presence of imperfect sensing decisions.  ...  More specifically, optimal decision rule is characterized for rectangular QAM, and closed-form expressions for the average symbol error probability attained with the optimal detector are derived under  ...  With this motivation, we in this paper study the symbol error rate performance of cognitive radio transmissions in the presence of imperfect channel sensing decisions.  ... 
arXiv:1310.1822v2 fatcat:cfjt3baecrgfvcc75v4zywdcqm

IEEE Signal Processing Magazine - May 2006

2006 IEEE Signal Processing Magazine  
ACKNOWLEDGMENTS The research leading to these results has received funding from the European Community's Seventh  ...  These two constraints are important in a cognitive radio system, since P FA is related to the throughput of the cognitive radio system, whereas P MD is related to the interference to the primary system  ...  In particular, the optimal voting rule, optimal local decision threshold, and minimal number of cognitive radios are derived, where optimality is defined in terms of the (unweighted) global probability  ... 
doi:10.1109/msp.2006.1628863 fatcat:3xpekmfz3fb4napvmsukwrlbvu

Sensing Throughput Tradeoff for Cognitive Radio Networks with Noise Variance Uncertainty

Tadilo Endeshaw Bogale, Luc Vandendorpe, Long Le
2014 Proceedings of the 9th International Conference on Cognitive Radio Oriented Wireless Networks  
In particular, when the frame duration is 2s, SNR= −20dB, and each of the bandwidths of the white and target sub-bands is 6MHz, the optimal sensing times are 28.5ms and 50.6ms with perfect and imperfect  ...  This paper proposes novel spectrum sensing algorithm, and examines the sensing throughput tradeoff for cognitive radio (CR) networks under noise variance uncertainty.  ...  Fig. 1 . 1 The frame structure of a cognitive radio network.  ... 
doi:10.4108/icst.crowncom.2014.255811 dblp:conf/crowncom/BogaleVL14 fatcat:yuwn6jnt35btrfp6yjgqogvikm

Error Rate Analysis of Cognitive Radio Transmissions with Imperfect Channel Sensing

Gozde Ozcan, M. Cenk Gursoy, Sinan Gezici
2014 IEEE Transactions on Wireless Communications  
This paper studies the symbol error rate performance of cognitive radio transmissions in the presence of imperfect sensing decisions.  ...  More specifically, the optimal decision rule is characterized for rectangular QAM, and closed-form expressions for the average symbol error probability attained with the optimal detector are derived under  ...  With this motivation, we in this paper study the symbol error rate performance of cognitive radio transmissions in the presence of imperfect channel sensing decisions.  ... 
doi:10.1109/twc.2014.020414.131182 fatcat:aljbb3fasve47hyxr5ays7svyq

Error Rate Analysis of Cognitive Radio Transmissions with Imperfect Channel Sensing

Gozde Ozcan, M. Cenk Gursoy, Sinan Gezici
2013 2013 IEEE 78th Vehicular Technology Conference (VTC Fall)  
This paper studies the symbol error rate performance of cognitive radio transmissions in the presence of imperfect sensing decisions.  ...  More specifically, the optimal decision rule is characterized for rectangular QAM, and closed-form expressions for the average symbol error probability attained with the optimal detector are derived under  ...  With this motivation, we in this paper study the symbol error rate performance of cognitive radio transmissions in the presence of imperfect channel sensing decisions.  ... 
doi:10.1109/vtcfall.2013.6692196 dblp:conf/vtc/OzcanGG13 fatcat:ohymgt3eprfmje3obowhsm4rau
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