A secure transmission method for robust wireless communication with optimized power resources

Abstract

The invention provides a robust wireless communication secure transmission method for optimizing power resources. A sender of information, a legal receiver, and a plurality of illegal eavesdroppers are included, wherein both the sender and the eavesdroppers are equipped with multi-antennas, and the receiver is only equipped with a single antenna. Artificial noise is introduced at the sender of theinformation, and the transmission power of the sender is minimized on the basis of satisfying the requirements of secure communication by jointly optimizing a beam-forming vector of useful information and a beam-forming matrix of the artificial noise. According to the method, a proposed secure transmission strategy is robust to a channel estimation error for a condition that eavesdropping channelestimation has an error. According to the method, while reliable and secure communication is achieved, the using efficiency of the power resources of the information sender can be significantly improved.

Description

technical field [0001] The invention belongs to information security technology in the field of wireless communication, relates to physical layer security technology, and proposes a multi-antenna beamforming (BF, Beamforming) design method that introduces artificial noise (AN, Artificial Noise). Background technique [0002] The rapid development of wireless communication technology has brought great convenience to people's life, but due to its inherent openness, wireless communication is vulnerable to outside eavesdropping, which poses a serious threat to communication security. How to prevent important information from illegal eavesdropping and ensure the security of communication is one of the hot issues in the field of communication research. [0003] There are two main types of current information security technologies [1]: one is the traditional security strategy based on cryptography, and the other is the security strategy based on physical layer security technology. ...

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Problems solved by technology

Considering that it is difficult to obtain accurate information of the channel in practical applications, [8,9] assume that the error of channel estimation obeys a deterministic model, that is, it is assumed that a certain measurement value of the error falls within a fixed range. In the case of beamforming design, but did not consider the introduction of AN to improve the performance of the system

[10,11] considered the design of using artificial noise to improve system security in the case of channel estimation errors, but the article assumes that the eavesdroppers are all single-antenna, but in actual situations, eavesdroppers can use multi-antenna technology to improve its eavesdropping capabilities, it will become more difficult to design for beamforming in this case

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