Intelligent Reflecting Surface Assisted Secrecy Communication: Is Artificial Noise Helpful or Not?
PLA Army Engineering University · National University of Singapore
Abstract
In this letter, we investigate whether the use of artificial noise (AN) is helpful to enhance the secrecy rate of an intelligent reflecting surface (IRS) assisted wireless communication system. Specifically, an IRS is deployed nearby a single-antenna receiver to assist in the transmission from a multi-antenna transmitter, in the presence of multiple single-antenna eavesdroppers. Aiming to maximize the achievable secrecy rate, a design problem for jointly optimizing transmit beamforming with AN or jamming and IRS reflect beamforming is formulated, which is however difficult to solve due to its non-convexity and coupled variables. We thus propose an efficient algorithm based on alternating optimization to solve…
Citation impact
- FWCI
- 39.11
- Percentile
- 100%
- References
- 12
Authors
3Topics & keywords
- Beamforming
- Artificial noise
- Computer science
- Transmitter
- Transmission (telecommunications)
- Jamming
- Antenna (radio)
- Wireless