Coding-Enhanced Cooperative Jamming for Secret Communication in Fluid Antenna Systems

This letter investigates the secret communication problem for a fluid antenna system (FAS)-assisted wiretap channel, where the legitimate transmitter transmits an information-bearing signal to the legitimate receiver, and at the same time, transmits a jamming signal to interfere with the eavesdroppe...

Full description

Saved in:
Bibliographic Details
Published in:IEEE communications letters 2024-09, Vol.28 (9), p.1991-1995
Main Authors: Xu, Hao, Wong, Kai-Kit, New, Wee Kiat, Li, Guyue, Ghadi, Farshad Rostami, Zhu, Yongxu, Jin, Shi, Chae, Chan-Byoung, Zhang, Yangyang
Format: Article
Language:English
Subjects:
Antennas
Coding
Communications systems
cooperative jamming
Fluid antenna system
Fluids
Gaussian noise
Jamming
physical layer security
port selection
Power control
Random noise
Receivers & amplifiers
Receiving antennas
Transmitting antennas
Wireless networks
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This letter investigates the secret communication problem for a fluid antenna system (FAS)-assisted wiretap channel, where the legitimate transmitter transmits an information-bearing signal to the legitimate receiver, and at the same time, transmits a jamming signal to interfere with the eavesdropper (Eve). Unlike the conventional jamming scheme, which usually transmits Gaussian noise that interferes not only with Eve but also with the legitimate receiver, in this letter, we consider that encoded codewords are transmitted to jam Eve. Then, by employing appropriate coding schemes, the legitimate receiver can successfully decode the jamming signal and then cancel the interference, while Eve cannot, even if it knows the codebooks. We aim to maximize the secrecy rate through port selection and power control. Although the problem is non-convex, we show that the optimal solution can be found. Simulation results show that by using the FAS technique and the proposed jamming scheme, the secrecy rate of the system can be significantly increased.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2024.3418338