Cognitive radio techniques under practical imperfections: A survey

SK Sharma, TE Bogale, S Chatzinotas… - … Surveys & Tutorials, 2015 - ieeexplore.ieee.org
Cognitive radio (CR) has been considered as a potential candidate for addressing the
spectrum scarcity problem of future wireless networks. Since its conception, several …

Spectrum sensing in the presence of multiple primary users

L Wei, O Tirkkonen - IEEE Transactions on Communications, 2012 - ieeexplore.ieee.org
We consider multi-antenna cooperative spectrum sensing in cognitive radio networks, when
there may be multiple primary users. A detector based on the spherical test is analyzed in …

A novel hybrid precoding-companding technique for peak-to-average power ratio reduction in 5G and beyond

M Mounir, MB El_Mashade, S Berra, GS Gaba… - Sensors, 2021 - mdpi.com
Several high-speed wireless systems use Orthogonal Frequency Division Multiplexing
(OFDM) due to its advantages. 5G has adopted OFDM and is expected to be considered …

Decentralized eigenvalue algorithms for distributed signal detection in wireless networks

F Penna, S Stańczak - IEEE Transactions on Signal Processing, 2014 - ieeexplore.ieee.org
In this paper, we derive and analyze two algorithms-referred to as decentralized power
method (DPM) and decentralized Lanczos algorithm (DLA)-for distributed computation of …

Maximum eigenvalue detection for spectrum sensing under correlated noise

SK Sharma, S Chatzinotas… - 2014 IEEE International …, 2014 - ieeexplore.ieee.org
Herein, we consider the problem of detecting primary users' signals in the presence of noise
correlation, which may arise due to imperfections in fltering and oversampling operations in …

Analysis of scaled largest eigenvalue based detection for spectrum sensing

L Wei, O Tirkkonen - 2011 IEEE International Conference on …, 2011 - ieeexplore.ieee.org
Scaled largest eigenvalue based detection is an ideal solution to spectrum sensing problem
in cognitive radio networks. However, results on the sensing performance are very limited. In …

Sensing orthogonal frequency division multiplexing systems for cognitive radio with cyclic prefix and pilot tones

Z Chen, T Luan, XD Zhang - IET communications, 2012 - IET
The detection of orthogonal frequency division multiplexing (OFDM) for cognitive radio is
considered in this paper. A frequency-selective fading channel is considered and the …

Multiple primary user spectrum sensing in the low SNR regime

L Wei, P Dharmawansa… - IEEE transactions on …, 2013 - ieeexplore.ieee.org
We consider multi-antenna cooperative spectrum sensing in cognitive radio networks, when
there are multiple primary users and/or multipath channels. A noise-uncertainty-free detector …

Enhanced detection algorithms based on eigenvalues and energy in random matrix theory paradigm

W Zhao, H Li, M **, Y Liu, SJ Yoo - IEEE Access, 2020 - ieeexplore.ieee.org
This paper considers the problem of spectrum sensing in multi-antenna cognitive radio
networks. Energy detection (ED) method for spectrum sensing does not require any …

[HTML][HTML] Unscented kalman filter based on spectrum sensing in a cognitive radio network using an adaptive fuzzy system

MR Amin, MM Rahman, MA Hossain, MK Islam… - Big Data and Cognitive …, 2018 - mdpi.com
In this paper, we proposed the unscented Kalman filter (UKF) based on cooperative
spectrum sensing (CSS) scheme in a cognitive radio network (CRN) using an adaptive fuzzy …