High-density differential frequency hopping communication method

Abstract

The invention discloses a high-density differential frequency hopping communication method, which belongs to communication technology. The high-density differential frequency hopping communication method comprises an emitting process and a receiving process, wherein the emitting process comprises serial-to-parallel conversion, the mapping treatment of a differential frequency hopping bit frequency point, the generation of a secondary frequency control word, the generation of a high-density differential frequency hopping frequency control word, and emitting; and the receiving process comprisesreceiving, discrete sampling, the recovery of the secondary frequency control word, frequency-domain waveform output, soft decision, synchronous decision, the serial-to-parallel conversion and data output. In the invention, on the basis of the initial primary secondary word, the secondary frequency word is added to increase the frequency point set density of transmission signals; while a receiving end performs frequency-shifting alignment treatment on the discrete data to remove secondary frequency signals, recover primary frequency signals and restore into the frequency point density of the traditional differential frequency hopping system. Thus, the high-density differential frequency hopping communication method has the characteristics that: the information transmission is safe and reliable; decoding is difficult; the confidentiality and anti-interception capability are high; the frequency point density can be adapted to a system security level according to requirements; and the like.

Description

Technical field [0001] The invention belongs to the differential frequency hopping communication technology in the field of communication technology, in particular to an anti-interception and information safe transmission method using high-density differential frequency hopping. Background technique [0002] As we all know, frequency hopping communication is one of the basic secure communication technologies with its good anti-interference and anti-interception performance. The confidentiality of the differential frequency hopping system is generally reflected in its anti-interception capability. For many years, communication security, confidentiality, and anti-jamming capabilities have always been the main performance requirements of diplomacy, commerce, and especially military communication equipment. It guarantees the ability of communication to be used in harsh electromagnetic environments. From the perspective of information warfare, the anti-interception requirements of mi...

AI Technical Summary

Problems solved by technology

[0016] The main disadvantage of the traditional differential frequency hopping communication system is that: with the development of time-frequency analysis technology and wireless interception technology, the differential frequency hopping communication system based on the existing 5kHz spectrum interval is easy to be intercepted due to its wide frequency point interval. The security of information transmission is poor, and it is currently unable to meet the requirements of diplomacy, commerce, especially the security and spectrum anti-intercept performance of modern military communications

Therefore, there are defects such as easy interception, deciphering, anti-interception and poor security of information transmission.

Images