Research Article
Selective Modulation and Cooperative Jamming for Secure Communication in Untrusted Relay Systems
@INPROCEEDINGS{10.1007/978-3-030-99200-2_27, author={Li Huang and Xiaoxu Wu and Hang Long}, title={Selective Modulation and Cooperative Jamming for Secure Communication in Untrusted Relay Systems}, proceedings={Communications and Networking. 16th EAI International Conference, ChinaCom 2021, Virtual Event, November 21-22, 2021, Proceedings}, proceedings_a={CHINACOM}, year={2022}, month={4}, keywords={Physical layer security Cooperative systems Selective modulation}, doi={10.1007/978-3-030-99200-2_27} }- Li Huang
Xiaoxu Wu
Hang Long
Year: 2022
Selective Modulation and Cooperative Jamming for Secure Communication in Untrusted Relay Systems
CHINACOM
Springer
DOI: 10.1007/978-3-030-99200-2_27
Abstract
In this paper, an innovative secure communication scheme for untrusted relay systems is proposed. The source and jamming signals are jointly designed based on the selective modulation. The source signal adopts selective modulation, composed of one selection bit and one or more signal bits. The selection bit is employed to carry confidential information, while the signal bits are generated randomly and are modulated the random signal. The selection bit determines the transmit slot/frequency of signal bits, namely, the random signal. The design of the cooperative jamming signal includes two parts, adjusting the signal transmit power and rotating the signal phase. The simulation results demonstrate that our proposed scheme can make the bit error ratio of the selection bit at the untrusted relay to be 0.5. That is, there is no confidential information leakage at the relay node. Besides, the proposed scheme is superior to the Gaussian jamming signal in terms of the secrecy capacity.
