Power Allocation Method in Cooperative Network Based on Artificial Noise

Abstract

The invention discloses a power distribution method in a collaborative network based on artificial noise under the condition of non-ideal channel estimation of a main channel and a cooperative channel. The transmitting end uses the legal communication main channel information obtained by the non-ideal channel estimation method to design the transmitting signal, carry out the power allocation between the useful signal and the artificial noise signal, and send useful and confidential information to the legal receiver as much as possible on the basis of ensuring the safety performance. information. At the same time, in order to improve the security of confidential messages, a cooperative jammer Cooperative Jammer (CJ) is added. CJ uses the cooperative channel information obtained by the non-ideal channel estimation method to design and send signals to interfere with the eavesdropping node Eve. Under the condition that the transmitting end only knows the statistical channel information of the eavesdropping channel, optimizing the power allocation of the transmitting signal at the transmitting end maximizes the safe transmission rate of the system, and realizes the most effective and safe transmission of confidential messages in the cooperative network.

Description

technical field [0001] The invention belongs to the field of information technology security, and in particular relates to a power distribution method in a collaborative network based on artificial noise. Background technique [0002] With the development of wireless communication technology, information security technology based on physical layer resources has become a research hotspot in the two fields of wireless communication and information security. The diversity of physical layer resources in wireless communication systems provides a broad space for the research of physical layer security technology, but also leaves many problems to be solved urgently. In the past 10 years, the physical layer technology in wireless communication has developed vigorously, and new technologies emerge in an endless stream. Therefore, how to fully develop the uniqueness and confidentiality of physical layer resources has been deeply explored in the research of physical layer security tech...

AI Technical Summary

Problems solved by technology

However, current secure transmission designs are mainly based on the assumption that an ideal channel estimate with channel state information is available

However, in practical applications, this assumption is obviously unreasonable

[0005] In the case where both the main channel and the cooperative channel are non-ideal channel estimates, there must be errors between the estimated channel and the actual channel, so the artificial noise vector designed by the transmitting source based on the estimated channel state information and the cooperative jammer designed based on the estimated channel state information The interference signal will inevitably affect the legitimate receiver and reduce the signal-to-interference-noise ratio of the legitimate receiver

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