Detection of Primary User in Wide-band Cognitive Radio Networks over Fading Channel using Compressed Sensing | ||||
| Menoufia Journal of Electronic Engineering Research | ||||
| Article 4, Volume 29, Issue 1, January 2020, Page 31-38 PDF (1.32 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjeer.2020.69013 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Sabah M. Ahmed1; M. Abo-Zahhad1; Mohammed Farrag2; Khaled Ali BaAli3 | ||||
| 1Electrical and Electronics Engineering Department, Faculty of Engineering, Assiut University, Egypt. | ||||
| 2Electrical and Electronics Engineering Department, Faculty of Engineering, Assiut University, Egypt. Electrical Engineering Department, King Khalid University (KKU), Abha, KSA. | ||||
| 3Electrical and Electronics Engineering Department, Faculty of Engineering, Assiut University, Egypt. Electronics and Communication Department, Faculty of Engineering and Petroleum, Hadhramaut University, Yemen | ||||
| Abstract | ||||
| In wideband cognitive radio networks, Nyquist sampling rate is very challenging problem. It required expensive high speed analog to digital converter and large storage spaces. Lately, compressive sensing has been emerged as significant solution to crack the conventional sampling rate requirements. It proved the ability to sample below Shannan-Nyquist criteria and reconstructing back the signal after considerable dimensional reduction. Mostly in cognitive radio networks, energy detection is widely used due to its simple implementation and blind detection property. However, regardless that energy detection is subject to noise uncertainty as well as shadowing and fading which deteriorate its detection performance. Several articles have been published to improve energy detection performance using large number of measurements. In this paper, since, the detection performance using small number of measurements or compressed measurements achieved significant performance using energy detection under additive white Gaussian noise channel. This motivated us to investigate the performance of compressed measurements-based detection over fading channels which has not been studied yet. The proposed algorithm has been implemented using MATLAB. We also studied the tradeoff between the compression ratios and using fraction of transmitted signal and its impact on detection performance and threshold choice. In comparison with the ordinary compressed energy detection over the Rayleigh fading channel the results reveal that the proposed enhanced compressed measurements-based energy detection is better in performance of detection. | ||||
| References | ||||
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