Abstract
Due to the characteristics of the broadcast function of the wireless communication network, the problem of information security has become very serious. And because the traditional upper-layer encryption technology is accompanied by the advancement of computer technology and eavesdropping technology, it has become more and more far from being able to meet the needs of modern society for information security. The multi-antenna beamforming technology in the airspace technology is a technology that can effectively increase the strength of the legal signal and suppress the eavesdropping signal. Therefore, it has become the most important technology in the physical layer security of our country and deserves our attention. Therefore, this article aims to study the wireless communication physical layer information security technology based on airspace technology. Based on the analysis of the basic theory of physical layer security, the current status of physical layer security research and the airspace physical layer security technology, the artificial noise auxiliary technology is promoted and applied to security identification. Taking the speed of maximizing the safe frequency spectrum as the design goal, an algorithm for joint optimization of information noise beam and artificial noise beam is proposed. The simulation results show that this algorithm can effectively improve the security and stability of the system, and it can also solve the eavesdropping problem.
Highlights
With the progress and rapid development of my country's wireless communication technology, people's daily life and work methods have been significantly improved, and a wireless communication network that can be accessed at any time has been basically completed [1,2]
The security technology of the physical layer is to use a random feature of the wireless channel itself to realize the safe and reliable transmission of information
Because it is not a way to effectively prevent eavesdroppers from stealing information by using a neural key, but a way to fundamentally ensure the security of the information transmitted by using the inherent characteristics of the physical layer such as the decline of the neural key
Summary
With the progress and rapid development of my country's wireless communication technology, people's daily life and work methods have been significantly improved, and a wireless communication network that can be accessed at any time has been basically completed [1,2]. It is generally believed that one of the main goals of the upper-level secret key encryption algorithm is to ensure the transmission and security of data and information in the wireless and network, this encryption algorithm does have better security and efficiency. With the continuous development and improvement of the calculation data processing speed of modern computers, coupled with many problems such as the existence of the secret key, the encryption algorithm is no longer capable. The security technology of the physical layer is to use a random feature of the wireless channel itself to realize the safe and reliable transmission of information. Even if the current electronic computer technology has developed more mature, it will not let people fall into being cracked by the neural key, so its reliability requirements are higher, and the application prospects are broader[9,10]
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