Physical layer modulation scrambling method based on pseudorandom sequence

Abstract

The invention discloses a physical layer modulation scrambling method based on a pseudo-random sequence, which is used for confronting existing modulation identification means and improving the safetyperformance of a physical layer. The method comprises the steps that a source node S and a destination node D determine secret key information and modulation scrambling parameters through synchronization information; the source node S and the destination node D generate a synchronous pseudorandom sequence according to the key information; the source node S scrambles an original modulation point sequence according to the synchronous pseudo-random sequence and the modulation scrambling parameters; the source node S modulates the scrambling modulation point sequence and sends the scrambling modulation point sequence to the destination node D; the destination node D demodulates the received scrambling modulation signal to obtain a demodulation judgment point sequence; and the destination nodeD descrambles the demodulated decision point sequence according to the synchronous pseudo-random sequence and the modulation scrambling parameters to obtain a descrambled modulation point sequence. According to the method for performing pseudo-random scrambling on the modulation point, the modulation identification probability of an eavesdropper can be greatly reduced, so that the safety performance of a physical layer and the signal cracking difficulty are improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a physical layer modulation and scrambling security communication method, in particular to a physical layer modulation and scrambling method based on a pseudo-random sequence, which is suitable for a secure communication system using digital modulation technology. Background technique [0002] With the acceleration of 5G commercialization, the wireless communication system gradually gets rid of its subordinate status in the development of communication technology and becomes the main direction of communication technology development. The rapid development of wireless communication technology is prompting the continuous emergence of various new wireless networks and advanced wireless communication technologies. At the same time, the disadvantages of wireless networks are gradually emerging. Security problems such as eavesdropping and interference brought about by the o...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art, and propose a physical layer modulation and scrambling method based on a pseudo-random sequence, which is used to solve the problem that the prior art cannot well hide signal digital modulation characteristics and is extremely easy to be eavesdropped Technical issues of end detection and identification

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