TY - JOUR
T1 - Hybrid Accuracy-Time Trade-off Solution for Spectrum Sensing in Cognitive Radio Networks
AU - Ivanov, Antoni Stefkov
AU - Mihovska, Albena Dimitrova
AU - Poulkov, Vladimir
AU - Prasad, Ramjee
PY - 2019/1/1
Y1 - 2019/1/1
N2 - The rise of the cognitive radio systems as a concept for future networks has seen a great amount of scientific effort in the recent years. Appropriately, much attention is given to how the vital function of spectrum sensing should be executed. The cognitive radio device is required to be able to evaluate the spectral environment properly so that it may not create additional interference to the primary users. The task is further complicated by the need of optimization of the speed of the process so that the spectrum holes can be utilized. The sensing accuracy and sensing time are conflicting parameters, therefore, a suitable trade-off is necessary for an optimal efficiency. We propose a dual-approach solution. The decision about the spectrum occupancy is made using the measured signal-to-noise ratio (SNR) and the received signal levels as inputs in a fuzzy logic algorithm. The result is then compared with the one acquired using the statistical method. Finally, an optimal balance between the sensing time and accuracy is obtained for the current environmental conditions using the derived closed form expression. The algorithm is implemented using the USRP and GNU Radio. Through simulation results, we have shown the efficiency of our proposal in relation to other existing methods.
AB - The rise of the cognitive radio systems as a concept for future networks has seen a great amount of scientific effort in the recent years. Appropriately, much attention is given to how the vital function of spectrum sensing should be executed. The cognitive radio device is required to be able to evaluate the spectral environment properly so that it may not create additional interference to the primary users. The task is further complicated by the need of optimization of the speed of the process so that the spectrum holes can be utilized. The sensing accuracy and sensing time are conflicting parameters, therefore, a suitable trade-off is necessary for an optimal efficiency. We propose a dual-approach solution. The decision about the spectrum occupancy is made using the measured signal-to-noise ratio (SNR) and the received signal levels as inputs in a fuzzy logic algorithm. The result is then compared with the one acquired using the statistical method. Finally, an optimal balance between the sensing time and accuracy is obtained for the current environmental conditions using the derived closed form expression. The algorithm is implemented using the USRP and GNU Radio. Through simulation results, we have shown the efficiency of our proposal in relation to other existing methods.
KW - Adaptive spectrum sensing
KW - Cognitive radio
KW - Energy detection
KW - Fuzzy logic
KW - GNU radio
KW - USRP
UR - http://www.scopus.com/inward/record.url?scp=85062791007&partnerID=8YFLogxK
U2 - 10.1504/IJMNDI.2019.098223
DO - 10.1504/IJMNDI.2019.098223
M3 - Journal article
SN - 1744-2869
VL - 9
SP - 1
EP - 13
JO - International Journal of Mobile Network Design and Innovation
JF - International Journal of Mobile Network Design and Innovation
IS - 1
ER -