A combined spectrum sensing method based DCT for cognitive radio system

Muntasser S. Falih, Hikmat N. Abdullah
2020 International Journal of Electrical and Computer Engineering (IJECE)  
In this paper a new hybrid blind spectrum sensing method is proposed. The method is designed to enhance the detection performance of Conventional Energy Detector (CED) through combining it with a proposed sensing module based on Discrete Cosine Transform (DCT) coefficient's relationship as operation mode at low Signal to Noise Ratio (SNR) values. In the proposed sensing module a certain factor called Average Ratio (AR) represent the ratio of energy in DCT coefficients is utilized to identify
more » ... ized to identify the presence of the Primary User (PU) signal. The simulation results show that the proposed method improves PU detection especially at low SNR values.
doi:10.11591/ijece.v10i2.pp1935-1942 fatcat:hpvv4wflnbcq7hb4n5hwoskhbq