Improvement of Energy Detection Based Spectrum Sensing in Cognitive Radio Network Using Adaptive Threshold
Journal Title: IOSR Journal of Electronics and Communication Engineering(IOSR-JECE) - Year 2018, Vol 13, Issue 2
Abstract
There is a huge demand for spectrum, but in conventional system radio spectrum is inefficiently used. To overcome this problem and improve spectrum utilization, cognitive radio concept has been proposed. Cognitive radio (CR) is the greatest mechanism for use spectrum efficiently. The main objective of CR is to use scarce and limited natural resources efficiently without any interference to the primary users. One of most challenging issues in cognitive radio systems is spectrum sensing concepts. There are various spectrum sensing techniques like matched filter detection, energy detection, cyclostationary detection, covariance detection and wavelet detection. Out of these techniques energy detection has got the most attention by the researchers due to its simplicity and low computational requirements. In this study we explain the Energy detection spectrum sensing method that still used in cognitive radio. Energy detection scheme has taken for spectrum sensing because it doesn’t require any prior information of the primary user (PU) signal, but the performance of energy detection scheme degrades at low signal to noise ratio (SNR) region. Since the performance of energy detection scheme highly depends on noise. In this paper, we have proposed an adaptive threshold for energy detection scheme to improve the detection performance at low SNR region. Our proposed adaptive threshold is a function of the detection threshold and SNR of the primary user received at the sensing node. Simulation results will show that the detection performance of our proposed scheme is much better than the fixed threshold based energy detector at low SNR region.
Authors and Affiliations
Md. Mehedi Hasan, Md. Mirajul Islam, Md. Imran Hussain, Sk. Mizanur Rahman
Keywords
Related Articles
- EP ID EP438980
- DOI 10.9790/2834-1302011120.
- Views 147
- Downloads 0
BER Performance of Adaptive Spatial Modulation
Adaptive spatial modulation(ASM) is a recently developed communication system that generalizes both Spatial Modulation(SM) and Transmit Antenna Selection(TAS). Data stream is divided in signal carried information and spa...
A Sub-Optimum Feature Selection Algorithm for Effective Breast Cancer Detection Based On Particle Swarm Optimization
Breast cancer (BC) disease is considered as a leading cause of death among women in the whole world. However, the early detection and accurate diagnosis of BC can ensure a long survival of the patients which brought new...
Structure and temperature profile limits of optic fiber chalcogenide material based selenium
The X-ray diffraction pattern of the system Se80S20-xB where (x=0,2.5,5 and B=In or As) confirms the amorphous nature of the bulk and thin film of all samples. The addition of In or As to Se80S20 on the expense of S conf...
Dilution of Position Calculation for MS Location Estimation in Wireless Communication Systems
Geometric dilution of precision (GDOP) represents the geometric effect on the relationship between measurement error and positioning determination error. When the measurement variances are equal in each other, GDOP could...
Evaluation of Traffic Delay and Resources Utilization in Wlan Handover Schemes
Wireless local area networks (WLAN) have seen rapid growth making it very popular and widely used in data communication. New technologies in WLAN provide high data rates for real time services and also support multimedia...