Multi-path frequency hopping-based single-channel blind source separation anti-interference communication system and method thereof

Abstract

The invention brings forward a multi-path frequency hopping-based single-channel blind source separation anti-interference communication system and a method thereof, thereby solving a technical problem of improvement of an anti-interference capability of a frequency hopping communication system in a complex electromagnetic environment. According to the invention, multi-path hopping carrier frequencies are utilized at a transmitting terminal of a frequency hopping communication system to carry out frequency hopping modulation on the same emission signal simultaneously; multi-path hopping carrier frequencies corresponding to the transmitting terminal are utilized at a receiving terminal to carry out dehopping on a received mixed signal respectively, thereby obtaining multi-path mixed signals; and a blind source separation algorithm is used to carry out signal and interference blind separation on the mixed signals and after signals are obtained, dehopping is carried out on the signals to obtain a source signal. When the system and the method are used, on the condition that the number of transmitting antennas and the number of receiving antennas of the traditional frequency hopping communication system are not increased, a single-channel blind source separation technology is used to carry out separation of a source signal from a signal, thereby substantially enhancing communication efficiency of the frequency hopping communication system and improving the anti-interference capability of the system in the complex electromagnetic environment.

Description

technical field [0001] The invention belongs to the technical field of digital communication, relates to a frequency hopping communication system and method, and in particular relates to a single-channel blind source separation anti-jamming communication system and method based on multi-channel frequency hopping. Background technique [0002] In modern communication systems, due to the increasing radiated power of various wireless devices (such as radar, satellite communication, mobile communication, navigation, etc.) The electromagnetic environment is increasingly complex. [0003] Wireless devices are often affected by various interferences during the communication process, and the interference signals are often random, unknown or even malicious to the communication system. Among many anti-jamming technologies, spread spectrum communication technology has been attracting attention due to its unique advantages such as strong anti-jamming capability, good information concea...

AI Technical Summary

Problems solved by technology

However, with the new military changes and the development of communication jamming and anti-jamming technology, as well as the requirements of military communication network systems, the conventional frequency-hopping anti-jamming theory faces many new challenges in the field of military communications, and is no longer suitable for communication networks and Network anti-jamming requirements make it more difficult to efficiently resist man-made malicious jamming, dynamic jamming, full-band blocking jamming, etc. serious threat of interference

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