Anti-jamming secure communication method for analog video signals in simplex communication state

Abstract

The invention discloses an anti-jamming secure communication method for analog video signals in a simplex communication state, which comprises the steps that a frequency point list 1 and a frequency point list 2 shared by the transmitting party and the receiving party are generated; a frequency hopping sequence 3 is generated through the frequency point list 1, and initial synchronization and communication contact between a transmitting terminal and a receiving terminal are completed according to a conventional frequency hopping communication mode; a random frequency hopping scheme in the communication process is designed based on the frequency point list 2, and encryption is performed on the random frequency hopping scheme; the transmitting terminal loads and transmits encrypted information of the frequency hopping of a subsequent communication signal by using a field blanking section of the previous analog video signal; the receiving terminal receives the encrypted information and then decrypts a frequency hopping scheme of a subsequent signal to be received and changes the frequency point of the receiving terminal according to the frequency hopping scheme; and the conventional frequency hopping communication performed according to the frequency hopping sequence 3 is restored at the interval of a certain fixed period, and the synchronization state of the transmitting and receiving system is re-established. The anti-jamming secure communication method can effectively improve the confidentiality and anti-jamming performance of the analog video signals in the simplex communication state on the basis of the original conventional frequency hopping communication.

Description

technical field [0001] The invention relates to the field of security communication, in particular to an anti-interference security communication method for analog video signals in a simplex communication state. Background technique [0002] With the wide application of unmanned aerial vehicle, vehicle-mounted, missile-borne and other video detection equipment in the military field, in the context of the increasingly fierce electronic countermeasures in modern warfare, the anti-jamming and confidential communication transmission of video signals has become more and more important. more important. Since there is no time delay in analog video signals, many video detection equipments that require high signal time delay still use analog video signals for transmission. If the existing analog video signal adopts fixed-frequency communication, it is very easy to be interfered and intercepted by a third party during the communication process. The more common secure communication m...

AI Technical Summary

Problems solved by technology

The anti-interference of this adaptive frequency hopping communication method is better than the conventional frequency hopping communication method, but the communication is required to be carried out in a duplex communication state, and it is not suitable for the confidential transmission of analog video signals in a simplex state.

Moreover, although the order of frequency point hopping in the adaptive frequency hopping communication method can be changed and updated in real time during the communication process, it is the same as the conventional frequency hopping communication method. Both parties in the communication agree in advance on a designed frequency hopping pattern, and The frequency hopping pattern is not generated in real time during the communication process, and there is a possibility of leaking the secret in advance and making the third party track and interfere

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