Enhancing the Physical Layer Security of Non-Orthogonal Multiple Access in Large-Scale Networks
Queen Mary University of London · University of Southampton
Abstract
This paper investigates the physical layer security of non-orthogonal multiple access (NOMA) in large-scale networks with invoking stochastic geometry. Both single-antenna and multiple-antenna aided transmission scenarios are considered, where the base station (BS) communicates with randomly distributed NOMA users. In the single-antenna scenario, we adopt a protected zone around the BS to establish an eavesdropper-exclusion area with the aid of careful channel ordering of the NOMA users. In the multiple-antenna scenario, artificial noise is generated at the BS for further improving the security of a beamforming-aided system. In order to characterize the secrecy performance, we derive new exact expressions of…
Citation impact
- FWCI
- 53.48
- Percentile
- 100%
- References
- 56
Authors
5Topics & keywords
- Artificial noise
- Computer science
- Physical layer
- Secrecy
- Stochastic geometry
- Antenna (radio)
- Computer network
- Base station
- Reduced inequalities