Open Access

ARTICLE

Analysis of Underlay Cognitive Radio Networks Based on Interference Cancellation Mechanism

by Lei Wang, Jian Liu, Changming Zhao, Alan Yang

1 School of Computer & Communication Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
2 School of Computer Science, Chengdu University of Information Technology, Chengdu, 610225, China.
3 College of Computer Science, Sichuan University, Chengdu, 610041, China.
4 Amphenol Assemble Tech, Houston, TX 77070, USA.

* Corresponding Author: Changming Zhao. Email: .

Computers, Materials & Continua 2020, 63(1), 401-416. https://doi.org/10.32604/cmc.2020.06680

Received 20 March 2019; Accepted 08 May 2019; Issue published 30 March 2020

Abstract

In this paper, we investigate the performance of secondary transmission scheme based on Markov ON-OFF state of primary users in Underlay cognitive radio networks. We propose flexible secondary cooperative transmission schemewith interference cancellation technique according to the ON-OFF status of primary transmitter. For maximal ratio combining (MRC) at destination, we have derived exact closed-form expressions of the outage probability in different situations. The numerical simulation results also reveal that the proposed scheme improve the secondary transmission performance compared with traditional mechanism in terms of secondary outage probability and energy efficiency.

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Citations