Noise modulation method based on pseudo-random sequence

Abstract

The invention discloses a noise modulation method based on a pseudo-random sequence. The noise modulation method is used for confronting a conventional communication reconnaissance means. The method comprises the steps that a source node S and a destination node D determine noise modulation parameters according to synchronization information and generate a synchronous pseudo-random sequence; the source node S and the destination node D generate a noise codeword sequence according to the synchronous pseudo-random sequence; the source node S performs noise modulation according to the noise codeword sequence; the source node S up-converts the noise modulation signal to a carrier frequency and sends the carrier frequency to the destination node D; the destination node D down-converts the received noise modulation signal to zero intermediate frequency to obtain a sampling point sequence; and the destination node D performs demodulation according to the noise codeword sequence to obtain a demodulated code element sequence. According to the invention, the code element sequence is modulated into the pseudo noise signal, so that the probability of interception can be greatly reduced, the risk of tracked interference is further reduced, the signal cracking difficulty is also improved, and the secure communication capability is enhanced.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to a physical layer modulation method, in particular to a noise modulation method based on a pseudo-random sequence, and is suitable for a secure communication system using digital modulation technology. Background technique [0002] The rapid development of electronic information technology is not only changing people's way of life, work, and learning, but also gradually changing the rules of modern warfare. The level of electronic information technology has gradually become a key factor in determining the outcome of a war. The electronic equipment (system) of one’s own side, and the new means of warfare aimed at protecting the electronic equipment (system) of one’s own side from normal performance—electronic warfare. Electronic warfare is divided into radar countermeasures, communication countermeasures, photoelectric countermeasures, and aquatic countermeasures. Played a...

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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 noise modulation method based on a pseudo-random sequence, which is used to solve the problem that the prior art cannot well hide the artificial signal characteristics of the communication waveform and is extremely easy to be eavesdropped. Technical issues of interception and jamming

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