Abstract
According to the current challenges of spectrum scarcity, poor wireless communication quality, insufficient energy supply and physical layer security, this paper proposes a secure transmission scheme for multi-hop cognitive relay radio networks based on the underlay mode. When a passive eavesdropper E exists in the transmission environment, secondary source S needs to transmit secrecy information to the legitimate destination D. For the underlay spectrum sharing strategy, S and cognitive relays access the licensed spectrum concurrently with primary transmission by controlling the interference to the primary networks under the interference threshold. In order to achieve better communication between S and D, this paper adds some secondary relays to assist cognitive communication, and these secondary relays are equipped with energy harvesting (EH) devices that will collect energy from the surrounding radio frequency (RF) environment based on the time switching strategy. Then, this energy will supply consumption of decoding and forwarding (DF) the received signal. In the process of forwarding the signal through the secondary relays to D, artificial noise is added to the last relay so that D can successfully receive the message while preventing E from eavesdropping on the secret message. This paper analyzes the influence of target data rates, energy harvesting times, interference thresholds, and other factors on secrecy outage probability (SOP), secrecy capacity (SC), and energy efficiency (EE).
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Funding
This work was supported by National Natural Science Foundation of China (Grant No. 61877067), Foundation of Science and Technology on Near-Surface Detection Laboratory (6142414211503).
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Zhang, J., Qi, X., Cai, Y. et al. Secure transmission performance analysis of multi-hop cognitive relay radio networks with energy harvesting and artificial noise aided. Wireless Netw 29, 3829–3837 (2023). https://doi.org/10.1007/s11276-023-03329-1
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DOI: https://doi.org/10.1007/s11276-023-03329-1