Collaboration network power distribution method based on artificial noise under nonideal channel estimation condition of collaboration channel

Abstract

The invention discloses a collaboration network power distribution method based on artificial noise under a nonideal channel estimation condition of a collaboration channel. The method comprises the steps that S1, a legal receiving end sends pilot sequences to a transmitting end of an transmitting source, and a collaboration jammer; S2, the transmitting end receives the pilot sequence and carries out ideal channel estimation, and the collaboration jammer receives the pilot sequence and carries out nonideal channel estimation; S3, the transmitting end and the collaboration jammer design respective transmitting signals; S4, the transmitting end and the collaboration jammer transmit signals to the legal receiving end and an eavesdropping end at the same time; S5, the optimum transmitting power distribution ratio and the maximum safe transmission rate under the nonideal channel estimation condition of the collaboration channel are calculated; S6, the optimum transmitting power distribution ratio and the maximum safe transmission rate under an ideal channel estimation condition of the collaboration channel are calculated; and S7, the maximum safe transmission rates under the nonideal channel estimation condition and the ideal channel estimation condition are compared. According to the collaboration scheme provided by the method, the condition that an error exists in the channel estimation method of the collaboration channel is taken into full consideration, and the practical power distribution scheme for realizing system safety is proposed.

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...

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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 ja

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