Cooperative Channel Imperfect Estimation Cooperative Network Power Allocation Method Based on Artificial Noise

Abstract

The invention discloses a power allocation method in a cooperative network based on artificial noise under the condition of non-ideal channel estimation of a cooperative channel, comprising the following steps: S1: a legal receiving end sends a pilot sequence to a transmitting end of a transmitting source and a cooperative jammer; S2: The transmitter receives the pilot sequence for ideal channel estimation, and the cooperative jammer receives the pilot sequence for non-ideal channel estimation; S3: The transmitter and the cooperative jammer design their own transmission signals; S4: The transmitter and the cooperative jammer simultaneously transmit signals to Legal receiving end and eavesdropping end; S5: Calculating the optimal transmission power allocation ratio and the maximum safe transmission rate under the estimated conditions of the non-ideal channel of the cooperative channel; S6: Calculating the optimal transmission power allocation ratio and the maximum safe transmission rate under the estimated conditions of the ideal channel rate; S7: comparing the maximum safe transmission rate under ideal and non-ideal channel estimation conditions. The cooperation scheme proposed by the invention fully considers the estimation error in the channel estimation method of the cooperation channel, and proposes a practical power allocation scheme for realizing system security.

Description

technical field [0001] The invention belongs to the field of information technology security, and in particular relates to a power allocation method in a cooperative network based on artificial noise under the condition of non-ideal channel estimation of a cooperative channel. Background technique [0002] In recent years, physical layer security has become a research hotspot in the field of wireless communication and has developed rapidly. Physical layer security technology utilizes the diversity and time-varying nature of wireless channels as well as the uniqueness and reciprocity of channel characteristics of both communication parties to achieve secure transmission. It does not require key distribution, and can achieve fast access and high-strength security performance. Multi-antenna transmission beamforming technology can improve data transmission, improve the stability of wireless communication, and can increase power gain and space degree of freedom gain, multiply ch...

AI Technical Summary

Problems solved by technology

[0005] In the case that the cooperative channel is a non-ideal channel estimation, there must be errors between the estimated channel and the actual channel, so the interference signal designed by the cooperative jammer based on the estimated channel state information will inevitably cause interference to the legitimate receiver, which will cause the legitimate receiver Signal to Interference plus Noise Ratio (SINR) reduction

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