Design of Security Transmission Scheme for Cooperative Communication with Untrusted Relay
LI Hang-b · Journal of Military Communications Technology · 2015
Cooperative communication can improve the anti-fading ability of the system by transmitting the information with the help of the relay nodes,while the transmitted messages may be obtained by the relay nodes during the cooperative transmission,which causes great challenge for the privacy and security of information transmission.Researches show that the MSK(Minimum-Shift Keying)signal has many kinds of generating method,and that the signal waveforms generated by the different generating method for the same messages are different.This means the MSK modulator structure has certain encrypting function for the input messages.Referring to the idea of frequency hopping communication,and aiming at the three nodes cooperative system with untrusted relay,a security cooperative transmission scheme via MSK modulator structure hopping randomly was presented in this paper.Simulation results show that this scheme can obtain the performance advantage of cooperative transmission and avoid the transmitted messages to be eavesdropped by the untrusted relay simultanuoasly.