Scientific Development Research

Wireless communication uses electromagnetic wave instead of the traditional cable transmission of information, so that the efficiency of information transmission has been further improved. Using wireless information transmission carrier, it shows the characteristics of free and open transmission at the speed of light. The most obvious advantage of wireless communication is that it can transmit information in a short time using only electromagnetic waves, but it also creates the conditions for eavesdropping attacks. The high rate, high capacity and low delay of wireless communication do bring great convenience, but at the same time, the security of communication system should be considered more. The physical security technology can use wireless channel fading and noise of features, through the power control technology such as blocking hacking total cant decode correctly, and then make the system safe capacity improved, more do not need to design complex encryption and decryption algorithm, therefore using the physical security technology become the key means and ways to solve the problem of wireless communication security. Non-orthogonal multiple access technology and power control of cognitive radio technology are both core technologies. The realization of physical layer security technology on this basis is one of the key research contents at present.

Wireless communication; Physical layer security; Non-orthogonal multiple access; Cognitive radio