학술논문
Spectrum Sensing in OFDM using Energy Detection: A Comparative Study in AWGN and Rayleigh Channels
Document Type
Conference
Source
2020 International Conference on Electronics and Sustainable Communication Systems (ICESC) Electronics and Sustainable Communication Systems (ICESC), 2020 International Conference on. :1118-1121 Jul, 2020
Subject
Language
Abstract
Orthogonal Frequency Division Multiplexing based modulation schemes has the advantage of reducing ISI in Cognitive Radios (CR). An OFDM modulation scheme for CR, with QAM and PSK symbol mapping techniques, is implemented. Spectrum sensing is carried out for this ISI free system using Energy Detection method, both in AWGN and Rayleigh fading channels. The performance of these systems is compared using ROC curves and Area under ROC's. Results of the analysis showed that QAM-OFDM in AWGN channel conditions yielded better performance for energy detection based spectrum sensing.