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Improved Transmission Strategies for Cognitive Radio Under the Coexistence Constraint

Pin-Hsun Lin, Shih-Chun Lin, Hsuan-Jung Su, Y.-W P. Hong
2012 IEEE Transactions on Wireless Communications  
We consider the interference-mitigation based cognitive radio where the primary and secondary users can coexist at the same time and frequency bands, under the constraint that the rate of the primary user  ...  To meet such a coexistence constraint, the relaying from the secondary user (SU) can help the PU's transmission under the interference from the SU.  ...  ACKNOWLEDGEMENTS The authors would like to thank the reviewers and the Associate Editor for their suggestions that greatly improved the paper in readability.  ... 
doi:10.1109/twc.2012.092712.120005 fatcat:2vt5svbflrdhjcpe33urlfjdj4

Game theoretic downlink resource scheduling for self-coexisting cognitive radio networks

Sayef Azad Sakin, Abdur Razzaque
2016 2016 International Conference on Networking Systems and Security (NSysS)  
Cognitive Radio Networks (CRNs) provide a convenient way to access under-utilized TV bands for wireless radio users.  ...  In this paper, we propose a fully distributed non-cooperative game theoretic scheme for resource scheduling in self-coexisting cognitive radio networks.  ...  INTRODUCTION Cognitive Radio (CR) [1] is a cutting edge technology to increase efficient spectrum utilization between many radio users.  ... 
doi:10.1109/nsyss.2016.7400697 dblp:conf/nsyss/SakinR16 fatcat:4dflltsahrayzgkojmowflgxiy

Distributed QoS Constraint based Resource Adaptation Strategy for Cognitive Radio Networks

Yakubu S. Baguda
2018 International Journal of Advanced Computer Science and Applications  
This paper primarily investigates and addresses the optimal power adaptation strategy problem for multi-user cognitive radio network.  ...  Subsequently, the solution has been used to dynamically adjust the radio power of the SUs to conform with the stringent network constraint and ensures coexistence amongst the users.  ...  The author is grateful to the DSR for their technical and financial support.  ... 
doi:10.14569/ijacsa.2018.090429 fatcat:aeucprcspnhrfeeze2tjo4szsu

Cognitive Radio Protocols Based on Exploiting Hybrid ARQ Retransmissions

Ramy Abdallah Tannious, Aria Nosratinia
2010 IEEE Transactions on Wireless Communications  
This paper addresses user coexistence in cognitive radio systems by taking advantage of opportunities that arise during ARQ retransmission.  ...  The protocols are further extended to the scenario where multiple cognitive receivers exist. Performance analysis of the protocols is presented and their effectiveness is verified via simulations.  ...  For details and comparisons between different coding strategies for the cognitive radio channel see [7] .  ... 
doi:10.1109/twc.2010.062910.091162 fatcat:byxgc76hqveg5fbrkthpfzdsjy

Power Control for Cognitive Radio Networks under Imperfect CSI Based on Game Theory

Guanglong Yang, Xiao Wang, Xuezhi Tan
2014 International Journal of Control and Automation  
In this paper, the problem of power control for cognitive systems is studied via game theory.  ...  Simulation results show that under imperfect CSI the proposed approach can converge to a locally optimal transmission power level, while the sum utility of SUs converges with the increase of the transmission  ...  In [3] , a power consumption minimization problem is formulated under a sum rate constraint for a cognitive MIMO system.  ... 
doi:10.14257/ijca.2014.7.12.10 fatcat:ex2a3r3btnanrkmswnyuypvcfa

Minimum power transmission design for cognitive radio networks in non-stationary environment

Pouya Derakhshan-Barjoei, Gholamreza Dadashzadeh, Farbod Razzazi, S. Mohammad Razavizadeh
2011 IEICE Electronics Express  
In this paper, we develop an approach to allow the cognitive radio to operate in the presence of the licensed user using bioinspired method called particle swarm optimization.  ...  This method is invoked to solve the constrained nonlinear optimization problem for the minimum power transmission and minimum bit error rate in order to reach to maximum capacity.  ...  Proposed scheme shows the performance of a heuristic improvement in cognitive radio performance in a dynamic environment.  ... 
doi:10.1587/elex.8.136 fatcat:sih6diydlbcmhk64drtgk4ojle

Robust Power Control Algorithm for Multiple Primary Users and Secondary Users in Cognitive Radio Networks

Guanglong Yang, Xiao Wang, Xuezhi Tan
2014 International Journal of Control and Automation  
The aim is to maximize the sum rate of SUs under the interference power constraints at PUs, the total transmission power constraint of SUs.  ...  The objective is to maximize the sum rate of secondary users (SUs) subject to the primary users (PUs) interference power constraints and the transmission power constraint of SUs.  ...  Under ellipsoid approximation [10] , the true channel coefficient To improve the system performance of the secondary network, we employ a power control strategy to maximize its sum rate under the interference  ... 
doi:10.14257/ijca.2014.7.11.08 fatcat:it3zcmnsijf5llnqa5lc5bb7ga

Cognitive Medium Access: A Protocol for Enhancing Coexistence in WLAN Bands

Stefan Geirhofer, Lang Tong, Brian M. Sadler
2007 IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference  
A time-slotted physical layer for the cognitive radio is considered and CMA is derived based on experimental models.  ...  Numerical results are presented for typical coexistence setups and show a significant performance improvement.  ...  Related work CMA is relevant to both the cognitive radio and the coexistence community.  ... 
doi:10.1109/glocom.2007.676 dblp:conf/globecom/GeirhoferTS07 fatcat:2rcjjrqyizh2lb2qehvpuvcy3i

Breaking Spectrum Gridlock With Cognitive Radios: An Information Theoretic Perspective

A. Goldsmith, S.A. Jafar, I. Maric, S. Srinivasa
2009 Proceedings of the IEEE  
This information theoretic survey provides guidelines for the spectral efficiency gains possible through cognitive radios, as well as practical design ideas to mitigate the coexistence challenges in today's  ...  Cognitive radios hold tremendous promise for increasing spectral efficiency in wireless systems.  ...  UNDERLAY COGNITIVE RADIO The underlay approach to cognitive radio allows simultaneous cognitive and noncognitive communication under the constraint that the interference caused to the noncognitive user  ... 
doi:10.1109/jproc.2009.2015717 fatcat:rvnkortxtneb7loisy6ceeriwy

A Survey on MAC Strategies for Cognitive Radio Networks

Antonio De Domenico, Emilio Calvanese Strinati, Maria-Gabriella Di Benedetto
2012 IEEE Communications Surveys and Tutorials  
Dynamic spectrum policies combined with software defined radio are powerful means to improve the overall spectral efficiency allowing the development of new wireless services and technologies.  ...  First, we show the fundamental role of the MAC layer and identify its functionalities in a cognitive radio (CR) network. Second, a classification of cognitive MAC protocols is proposed.  ...  MGDB work was supported by COST Action IC0902 "Cognitive Radio and Networking for Cooperative Coexistence of Heterogeneous Wireless Networks", funded by the European Science Foundation and by FP7-ICT Network  ... 
doi:10.1109/surv.2011.111510.00108 fatcat:t7s4waiiufhohciz6nbzxqcruq

Spectrum Sharing in Cognitive Radio Prop up the Minimum Transmission Power and Maxi-Min SINR Stratagem

S. Azmat. Hussain, A. Naveed. Malik, I.M. Qureshi, F. Zaman
2013 Research Journal of Applied Sciences Engineering and Technology  
With the rapid growth of vigilance that cognitive radio participate an essential task in wireless communication to resolve the spectrum scarcity vs. under-utilization dilemma owing to the dormant spectrum  ...  In conclusion, the author give a novel idea about the seminal work of spectrum sharing by minimizing transmit power strategy and maximizing Signal to Interference plus Noise Ratio (SINR) strategy which  ...  at each receiver under the constraint of limited transmission power.  ... 
doi:10.19026/rjaset.6.3546 fatcat:6d5p6anegfakjjly3xyu5wvdw4

Joint Beamforming and Power Allocation Cognitive Radio Networks under Imperfect CSI

Jie Chen, Wen Xi, Xiaolong Sun
2015 International Journal of Future Generation Communication and Networking  
Our objective is to maximize the sum utility of secondary users (SUs) under the primary users (PUs) interference power constraints and the transmission power constraint of SUs.  ...  Traditional beamforming and power control algo-rithms in cognitive radio (CR) are based on the assumption of perfect channel state information (CSI) however; this may lead to performance degradation in  ...  Acknowledgements This research was supported by the Absorption of Imported Technology and Innovation Special Funds of China (No. JJ-YJCX-04-10-2828).  ... 
doi:10.14257/ijfgcn.2015.8.1.17 fatcat:hrybtxjcdzbr7jnuxzdvdq35eu

Subcarrier and power allocation in OFDM based cognitive radio networks A Survey
IJARCCE - Computer and Communication Engineering

VIDHYA. B, RAMYAH .S.B, REVATHI. G
2014 IJARCCE  
This paper investigates the subcarrier and power allocation problem for an OFDM-based cognitive radio (CR) system.  ...  For CR systems it is important to keep the interference below the certain threshold to the primary user and the total power allocated to the CR user under a constraint .  ...  The design of power allocation strategies for the secondary user fading channel under the constraint on the maximum acceptable PU transmission outage probability is considered.  ... 
doi:10.17148/ijarcce.2014.31219 fatcat:tr2ex6hfebhj3nxrnzyoujgyiq

Multi-antenna transmission for underlay and overlay cognitive radio with explicit message-learning phase

Ricardo Blasco-Serrano, Jing Lv, Ragnar Thobaben, Eduard Jorswieck, Mikael Skoglund
2013 EURASIP Journal on Wireless Communications and Networking  
First, for the uncoordinated underlay cognitive radio scenario, we fully characterize the optimal parameters that maximize the secondary rate subject to a primary rate constraint for a transmission strategy  ...  We then propose a transmission strategy that combines techniques for cooperative communication and for the classical cognitive radio channel.  ...  The authors would like to thank Adrian Kliks for the interesting discussions and valuable comments.  ... 
doi:10.1186/1687-1499-2013-195 fatcat:aqdamjgac5ay3frsmet3wj2pia

Optimal power allocation for cognitive relay networks: amplify-and-forward versus selection relay

WenJing Yue, BaoYu Zheng, QingMin Meng, WenJie Yue, JingWu Cui
2010 Science China Information Sciences  
In this network, a source is assisted by cognitive relay nodes which allow coexisting with primary user nodes by imposing severe constraints on the transmission power so that they operate below the noise  ...  In this paper, we mainly study the power allocation strategies of this system to minimize the outage probability subject to total and individual power constraints for cognitive relay nodes and subject  ...  To deal with the conflicts between spectrum scarcity and spectrum under-utilization, cognitive radio [2] has been considered as an efficient approach to improving the spectrum utilization by spectrum  ... 
doi:10.1007/s11432-010-4156-9 fatcat:gzxvgijj2nd2lld5wh2boriesy
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