Analog network coding system cooperative jamming method

Abstract

The invention provides an analog network coding system cooperative jamming method. A bidirectional relay channel communication system comprises information source nodes A and B, a relay R and an external eavesdropper E. Cooperative jamming carries out jamming on the information source nodes; a transmission mechanism of an analog network coding system finishes one bidirectional communication through two time slots; and under the condition that the transmitting power of the jamming signal is limited, by adjusting power distribution factors of the transmitting power of the jamming signal in each communication time slot, optimization of safety performance of the ANC system is realized. The method, on the basis that ANC can greatly enhance safety performance of a physical layer of the system, combines the CJ technology to further enhance the safety performance of the physical layer; the higher the transmitting power of the jamming signal is, the better the safety performance of the physical layer is; the method is suitable for the condition, where existing internal and external eavesdroppers exist simultaneously, and the transmitting power of the jamming signal is limited; and the method can reduce resource waste and realizes maximization of the safety performance.

Description

technical field [0001] The invention belongs to information security technology in the field of wireless communication technology, relates to physical layer security technology, and proposes an analog network coding (ANC, Analog Network Coding) system using cooperative jamming (CJ, Cooperative Jamming), which is an analog network coding system Collaborative 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 the cumbersome process of wiring and thus becomes very convenient, and can provide communication services for people anytime and anywhere. However, due to the openness of the wireless communication environment, all communication signals are transmitted in an open space, so they are easily interfered by external factors, such as natural noise, human eavesdropping, attack or tampering, etc. How to prevent informati...

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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 comb

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