An Anti-jamming Method for Frequency Hopping Communication Based on Cognitive Radio

Abstract

The invention discloses a frequency hopping communication anti-interference method based on cognitive radio. The frequency hopping communication anti-interference method comprises a frequency hopping communication interference spectrum sensing method, a method for obtaining spectrum windows by eliminating interference frequency points and a frequency hopping key sharing and transmitting method under an interference condition. Relevant ideas of the cognitive radio are combined into frequency hopping communication, and a plurality of spectrum windows with low interference temperatures are dynamically selected by sensing a surrounding electromagnetic environment as transmission frequency bands for frequency hopping signals, so that the adaptability of a radio frequency-hopping broadcasting station to the electromagnetic environment can be improved, the utilization rate of spectrum resources is increased, malicious interferences of enemies and self-disturbances between broadcast stations can be further suppressed, the network capacity of a frequency hopping communication network is improved, and the error rate of the whole frequency hopping system is reduced.

Description

Technical field [0001] The invention combines cognitive radio and frequency hopping communication in the field, and specifically relates to a method for improving the channel capacity of frequency hopping radio stations under the conditions of random interference, burst interference and mixed interference, and reducing system communication errors in interference environments Rate method. Background technique [0002] Frequency hopping communication has attracted much attention because of its good confidentiality, anti-far-near effect and anti-jamming performance. It is widely used in modern military shortwave, ultrashort wave and data link communication equipment. With the increasing complexity of the electromagnetic environment, the existing frequency hopping communication system is facing more and more problems and challenges, which gradually affect the performance of the frequency hopping anti-jamming communication system. [0003] Effectiveness (bandwidth, system capacity) and...

AI Technical Summary

Problems solved by technology

With the wide application of frequency hopping multiple access and frequency hopping networking in wireless communication, the available frequency resources between different users in the network and between networks in the same frequency band will become increasingly tense, and the orthogonality of the frequency hopping pattern set will increase. It is more difficult to be guaranteed, which leads to the increasingly obvious collision phenomenon of frequency hopping points, which will directly restrict the capacity improvement of frequency hopping communication network

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