Cooperative Jamming Method for Analog Network Coding Systems

Abstract

The cooperative jamming method of the simulated network coding system, the two-way relay channel communication system includes the source nodes A and B, the relay R and the external eavesdropper E, and the cooperative jamming implements interference for the source node, and the transmission mechanism of the simulated network coding system is divided into 2 A two-way communication is completed in two time slots. Under the condition that the transmission power of the interference signal is limited, the optimization of the safety and energy efficiency of the ANC system is realized by adjusting the power allocation factor of the transmission power of the interference signal in each communication time slot. The present invention combines CJ technology to further enhance the physical layer security performance on the basis that ANC can greatly enhance the physical layer security performance of the system. The higher the transmission power of the interference signal, the stronger the physical layer security performance of the system. The method of the present invention is applicable to simultaneous On the premise that there are internal and external eavesdroppers and the transmission power of the interference signal is limited, the method of the present invention can reduce waste of resources and realize maximum security and energy efficiency.

Description

Technical field [0001] The present invention belongs to information security technology in the field of wireless communication technology, and relates to physical layer security technology. It proposes an analog network coding (ANC, Analog Network Coding) system using cooperative jamming (CJ), which is an analog network coding system. Cooperative interference method. Background technique [0002] Wireless communication has developed rapidly because it is not restricted by the environment. Compared with wired communication, wireless communication reduces cumbersome processes such as wiring and thus becomes very convenient. It can provide people with communication services anytime and anywhere. However, due to the openness of the wireless communication environment, all communication signals are transmitted in an open space, so it is easy to be interfered by external factors. These factors include natural noise, human eavesdropping, attacks, or tampering. How to prevent the inform...

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Problems solved by technology

[0026] The problem to be solved by the present invention is: in the current physical layer information security technology, although there are many studies on the combination of ANC and CJ, the limitations are relatively large, and problems such as energy consumption and energy efficiency in practical applications are not considered.

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