A long-short code joint spread spectrum system UAV data link transmitter

A data link and unmanned aerial vehicle technology, applied in electrical components, transmission systems, etc., can solve problems that cannot meet military communication confidentiality requirements, information security risks, etc., and achieve increased anti-intercept ability, small size, and strong practicability Effect

Inactive Publication Date: 2017-11-10
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

Due to the obvious signal cycle characteristics of the current short-period pseudo-random sequence direct-sequence spread spectrum system data link, it is easy for non-cooperating parties to decipher the pseudo-random sequence through the periodic characteristics. There is a strong potential information security risk, and it can no longer meet the confidentiality requirements of military communications.

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  • A long-short code joint spread spectrum system UAV data link transmitter
  • A long-short code joint spread spectrum system UAV data link transmitter

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Embodiment Construction

[0011] figure 1 It is an electric principle block diagram of the present invention, and the embodiment is according to figure 1 Connect the lines. In the present invention, the timing control module 1 provides control signals to the data information generation module 2 to generate data, provides control signals to the synchronization information generation module 3 to generate synchronous data, provides control signals to the long code generation module 3 to generate long code sequences, and provides control signals Generate a short code sequence to the short code generation module 4, and each functional module is related in timing; the data information generation module 2 completes the framing and serial output of the information to be transmitted under the control of the timing control module 1 input timing control signal; The synchronization information generation module 3 completes the framing and serial output of the synchronization information under the control of the t...

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Abstract

The invention discloses a long-short code joint spread spectrum system unmanned aerial vehicle data link transmitter. It adopts the two-way signal orthogonal modulation system of short code direct spread signal and long code direct spread signal. The short code modulation information is the time synchronization information guiding the long code acquisition mode, and the long code modulation information is user data information. Compared with the data link of the short-period direct-spread system, the patent of the present invention adopts the long-period pseudo-random sequence spread spectrum, which significantly improves the anti-intercept ability of the UAV link, and also has high degree of digitization, small size, easy debugging, With the advantages of stable and reliable performance, it is suitable for information transmission in a complex electromagnetic environment that requires a high degree of command information security.

Description

technical field [0001] The patent of the invention relates to a long-short code joint spread spectrum system UAV data link transmitter in the field of UAV measurement and control, which is especially suitable for anti-interception wireless transmission with high requirements for command information security in complex electromagnetic environments. Background technique [0002] In order to deal with complex electromagnetic threats and improve the information security of wireless data transmission in the field of measurement and control, necessary anti-interception technology should be adopted. At present, the uplink and medium rate downlink of the UAV data link at home and abroad have widely used the short-period pseudo-random sequence direct sequence spread spectrum technology, but there is no report on the anti-intercept technology using the long-short code joint spread spectrum system . Due to the obvious signal cycle characteristics of the current short-period pseudo-ran...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/02H04B1/69
Inventor 李涛护王洪琳甄中建王育红何巍巍
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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