User scheduling method based on channel estimation error

Abstract

The invention discloses a user scheduling method based on a channel estimation error, and aims to solve the technical problems of high user scheduling cost and limited effect in the prior art. The method comprises the following steps: acquiring a main channel statistical fading coefficient and a channel estimation error; performing user precoding according to the main channel statistical fading coefficient and the channel estimation error; calculating the capacity of a main channel between the user and the base station according to the precoding vector; selecting a main channel user based on amain channel capacity maximization criterion, and randomly selecting an interference user; and sending information by utilizing the main channel user and the interference user to finish user scheduling. According to the invention, users can be accurately selected for information transmission, the maximization of security capacity is realized at a relatively low cost, and the security performanceof wireless transmission is effectively optimized.

Description

technical field [0001] The invention relates to a user scheduling method based on channel estimation error, which belongs to the technical field of wireless communication. Background technique [0002] As people have higher and higher requirements for the signal quality of wireless transmission of information, the security of wireless communication systems has become a hot spot of concern. The communication quality of legitimate users is mainly described from two aspects: reliability and unknowability; specifically, one is to ensure that the information received by legitimate users is not affected, and the other is to prevent eavesdroppers from obtaining the transmitted information. According to the above requirements, the definition of security capacity is generated, which is the difference between the capacity of the main channel and the capacity of the wiretapping channel. [0003] A multi-antenna communication system can improve signal quality through space diversity, a...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of high user scheduling cost and limited effect in the prior art, the present invention proposes a user scheduling method based on channel estimation error. On the premise of fully considering the channel estimation error, the user scheduling method is selected based on the maximization criterion of the main channel capacity. The main channel user, the present invention does not need to know the state information of the eavesdropping channel, and can maximize the security capacity through the cooperation between users at a small cost

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