Wireless communication data-carrying AN auxiliary safety transmission method and application

Abstract

The invention belongs to the technical field of satellite safety communication, and discloses a wireless communication data-carrying AN auxiliary safety transmission method and application, and the method comprises the steps: disturbing a column vector in an original discrete Fourier transform (DFT) matrix by adopting a chaotic pseudo-random sequence, and changing the inherent period of WFRFT, wherein the columns of the chaotic scrambling code WFRFT matrix and the rows of the inverse transformation matrix have orthogonality, different signals are processed by using different columns of the chaotic scrambling code WFRFT matrix, and the processed signals are transmitted as a data carrying AN; and meanwhile, a group of extra ANs are processed by using the column of the chaotic scrambling codeWFRFT and then are sent together. According to the method, the original DFT multiplier is adjusted by utilizing the pseudo-random sequence generated by the chaotic system, so that the hopping of thesubcarrier frequency is realized, and external interference or interception of other parties is effectively resisted; a constellation diagram of the constructed chaotic scrambling code WFRFT combinedsignal generates random splitting, rotation and diffusion, and interception based on a spectral feature recognition means is avoided; detection based on energy and a matched filtering method is avoided.

Description

technical field [0001] The invention belongs to the technical field of satellite safety communication, and in particular relates to a wireless communication carrying data AN-assisted safety transmission method and application. Background technique [0002] At present, satellite communication has the advantages of large communication coverage area, wide operating frequency band, long transmission distance and large communication capacity, so it is widely used in military communication and civilian communication. The U.S. military has successively developed communication systems such as the Wideband Global Satellite System (WGS), the Fleet Satellite Communication System (FLTSATCOM) and the Ultra High Frequency Follow-on Satellite (UFO). At the same time, it has also developed the "Defense Space Architecture" ( NDSA) and the Protected Military Star (MilStar) system to ensure secure communications between the armed forces under nuclear warfare. In the civilian field, high-throu...

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Problems solved by technology

[0006] (1) The continuous improvement of the algorithm complexity of traditional encryption methods increases the receiver's receiving burden and additional overhead affects the reliability of signal transmission

[0007] (2) In the study and protection of satellite anti-intercept signal characteristics and anti-jamming design to other parties, with the rapid development of interception and acquisition technology, the traditional satellite security communication system is easily damaged, and its reliability and effectiveness are increasingly affected. looming threat

[0008] (3) At present, the research on covert methods such as spread spectrum, digital watermarking and transform domain preprocessing is relatively isolated, lack of joint design and consideration between various technologies, and cannot take into account security and reliability

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