Journal
IEEE INTERNET OF THINGS JOURNAL
Volume 9, Issue 7, Pages 5329-5343Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JIOT.2021.3108002
Keywords
NOMA; Three-dimensional displays; Security; Internet of Things; Resource management; Unmanned aerial vehicles; Trajectory; Internet of Things (IoT); nonorthogonal multiple access (NOMA); secrecy outage probability (SOP); unmanned aerial vehicle (UAV)
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Funding
- National Natural Science Foundation of China [61971080]
- Natural Science Foundation Project of Chongqing [cstc2019jcyj-msxmX0032]
- Open Fund of the Shaanxi Key Laboratory of Information Communication Network and Security [ICNS201807]
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This article examines the secure communication performance of nonorthogonal multiple access (NOMA) communication systems with aerial eavesdroppers. It investigates the ground-to-ground and ground-to-air scenarios and derives exact expressions for the secrecy outage probability.
In this article, we study the secure communication performance of nonorthogonal multiple access (NOMA) communication systems with aerial eavesdroppers. First, the ground-to-ground NOMA communications systems are considered wherein the near user is uniformly distributed in an inner disc and the far user is uniformly distributed in an outer ring within cell coverage of a base station (BS) at the center. A single eavesdropper is uniformly distributed outside the protected zone or multiple eavesdroppers are randomly dispersed and modeled as a 3-D homogeneous Poisson point process. Subsequently, the secrecy performance of the ground-to-air NOMA communications systems is investigated wherein the near user is uniformly distributed in an internal 3-D spherical cap and the far user is uniformly distributed in an external 3-D spherical cap. To enhance secrecy performance, a protected zone is introduced around the ground BS. Novel exact expressions for the secrecy outage probability (SOP) for both scenarios are derived. Finally, Monte Carlo simulation results are presented to validate the correctness of the derived analytical expressions and demonstrate the effects of system parameters on SOP of the considered system.
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