Confidential Cooperative Communication with the Trust Degree of Jammer

Author:

Zhao MingxiongORCID,Liu DiORCID,Gao Hui,Feng WeiORCID

Abstract

In this paper, we consider the trust degree of a jammer, defined as the probability that the jammer cooperates to secure the legitimate transmission, and investigate its influence on confidential cooperative communication. According to the trust degree, we derive the closed-form optimal transmit signal-to-noise ratio (SNR) of the confidential message, ρ c ⋆ , to maximize the expected secrecy rate, and further obtain the relationship between ρ c ⋆ and the trust degree associated with the transmit SNR at the transmit user and channel gains. Simulation results demonstrate that the trust degree has a great effect on the transmit SNR of the confidential message and helps improve the performance of confidential cooperation in terms of the expected secrecy rate.

Funder

National Natural Science Foundation of China

Key Laboratory in Software Engineering of Yunnan Province

Publisher

MDPI AG

Subject

General Physics and Astronomy

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