Title: Full-Duplex Cognitive Radio based on Spatial Diversity

Issue Number: Vol. 8, No. 3
Year of Publication: Sep - 2018
Page Numbers: 162-167
Authors: A. Nasser, A. Mansour, K.-C. Yao, H. Assaf and H. Abdallah
Journal Name: International Journal of Digital Information and Wireless Communications (IJDIWC)
- Hong Kong
DOI:  http://dx.doi.org/10.17781/P002438


In this paper, a new Full-Duplex Cognitive Radio (FD-CR)is proposed based on the observations of multi secondary users (SUs) by exploiting the spatial diversity. Assuming that one SU and one Primary User (PU) can access the channel, the observations contain the noisy secondary signal when PU is absent, and the noisy secondary and primary signals when PU is active. The spectrum sensing is performed by applying Blind Source Separation (BSS) techniques on these observations. When detecting more than one noisy signal then PU is considered as active; In this case, SU should vacate the operating band. The BSS technique advantage is its ability to apply the spectrum sensing without needing SU to be silent leading to FD-CR. This fact enhances the data rate of SUs. In addition, BSS may avoid the drawbacks of the residual self-interference when applying self-interference cancellation in classical FD-CR. Experimental results show that in addition to eliminating the silence period, the performance of our developed algorithms based on BSS outperforms the classical spectrum sensing Energy Detector.