A Covert Communication Method Based on Transform Domain Processing

Abstract

The invention relates to a hidden communication method based on transform domain processing, which comprises hidden communication sending end design and receiving end design. Firstly, a sending end carries out spectrum sensing on a channel environment, generates a spectrum matrix, carries out pseudo random phase modulation, generates a time-domain basis function by IFFT and normalization processing so as to implement spectrum aggregation, carries out a cyclic shift operation by using the time-domain basis function as a prototype, completes modulation processing of CCSK on transmission data, and forms a transmission signal; and a receiving end generates a local related sequence by spectrum sensing, obtains a local time-domain basis function by IFFT, carries out the cyclic shift operation, makes cross-correlation with the received signal, implements CCSK demodulation, and recovers original sent data. According to the invention, a complex electromagnetic environment an be promptly and adaptively sensed, a high hidden communication system is adopted, and hidden communication exists, so that uninterrupted information transmission is always kept, high confidentiality of data is ensured,and enemy reconnaissance and interference threats are effectively resisted to.

Description

technical field [0001] The invention relates to a covert communication method based on transform domain processing, in particular to a covert communication method based on transform domain processing based on spectrum sensing, and belongs to the technical field of communication. Background technique [0002] The field of information and network is the key field of current and future military struggle. The core of information warfare is to obtain the initiative to win the war on the basis of obtaining the right to control information. As the combat environment becomes increasingly complex, interference and anti-interference, control and anti-control become more and more acute, communication needs to have intelligent and concealed capabilities, be able to adapt to complex electromagnetic environments quickly and adaptively, and adopt a high-concealment communication system to hide communication. Existence, so as to keep the information transmission between each unit uninterrup...

AI Technical Summary

Problems solved by technology

"Information and Control", Volume 43, Issue 5, 2014, "A Satellite Covert Communication System Based on a Transform Domain Communication System", proposes a satellite covert communication system based on a transform domain communication system, which is a relative satellite original service The overlapping communication idea of ​​signal concealment is different from the concealment implementation method based on the electromagnetic background of the present invention, and cannot be applied to the concealed communication between the sending end and the receiving end of the present invention

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