Performance Analysis of Cooperative-based Multi-hop Transmission Protocols in Underlay Cognitive Radio with Hardware Impairment
Main Article Content
In this paper, we study performances of multi-hop transmission protocols in underlay cognitive radio (CR) networks under impactÂ of transceiver hardware impairment. In the considered protocols, cooperative communication is used to enhance reliability ofÂ data transmission at each hop on an established route between a secondary source and a secondary destination. For performanceÂ evaluation, we derive exact and asymptotic closed-form expressions of outage probability and average number of time slots overÂ Rayleigh fading channel. Then, computer simulations are performed to verify the derivations. Results present that the cooperative -based multi-hop transmission protocols can obtain better performance and diversity gain, as compared with multi-hop schemeÂ using direct transmission (DT). However, with the same number of hops, these protocols use more time slots than the DT protocol.