Null-shift-keying-based physical layer safety transmission method in multi-input single-output system

Abstract

The invention discloses a null-shift-keying-based physical layer safety transmission method in a multi-input single-output system. The physical layer safety transmission method includes the steps that (1) the multi-input single-output communication system comprises a source node, a destination node and a wiretapping node, M transmitting antennas are assembled on the source node, and the destination node and the wiretapping node are each provided with an antenna; (2) information of the source node is grouped, wherein bit grouping is carried out on bit information sequences to be transmitted through the source node according to the same bit length; (3) null shift keying is carried out, wherein bit information contained in information bit groups is mapped to the transmitting antennas with the corresponding serial numbers through the source node, and the source node transmits antenna serial numbers to serve as carriers of information source information through null shift keying; (4) precoding processing is carried out, wherein precoding processing is carried out on symbols transmitted by the transmitting antennas through the source node. According to the null-shift-keying-based physical layer safety transmission method, limitation of a single-antenna system to the physical layer safety can be broken, the structure of a transceiver can be simplified, and defects in a traditional multi-antenna physical layer safety transmission method are overcome.

Description

technical field [0001] The present invention relates to a physical layer security transmission method using space shift keying (English for space shift keying is: Space Shift Keying, abbreviated as: SSK in the text), and specifically relates to a multiple input single output (multiple input Single output English is: Multiple-Input-Single-Output, abbreviation in the text: MISO) in the physical layer security transmission method based on space shift keying in the system. Background technique [0002] Due to the openness of the transmission medium, while wireless communication brings great convenience to people's life, it also threatens the user's personal privacy and property safety. Therefore, how to ensure the security of wireless data transmission so that it will not be stolen or deciphered is an important problem that must be solved in wireless communication. Traditionally, the security mechanism of the wireless communication network is mainly based on the wired computer ...

AI Technical Summary

Problems solved by technology

Although the application of these cryptographic methods in the field of information security has achieved great success and played an important role in maintaining information security, with the improvement of computer computing power and computing speed, the security based on computational complexity is becoming more and more serious. increasingly challenged

On the other hand, an important feature of wireless networks that is different from computer networks is the broadcast nature of information dissemination, which makes the online distribution, maintenance and management of keys more difficult.

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