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Composite chaotic sequence forming method and unmanned aerial vehicle measurement and control link anti-interference method

A chaotic sequence and unmanned aerial vehicle technology, applied in control/regulation systems, non-electric variable control, three-dimensional position/channel control, etc., can solve problems such as cross-correlation and poor balance characteristics, and achieve good balance characteristics and run-length characteristics , Improving the anti-jamming performance and the effect of good broadband pseudo-noise characteristics

Active Publication Date: 2020-12-15
HIWING AVIATION GENERAL EQUIP
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  • Claims
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Problems solved by technology

Although the traditional pseudo-random sequence has good autocorrelation, its cross-correlation and balance characteristics are poor

Method used

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  • Composite chaotic sequence forming method and unmanned aerial vehicle measurement and control link anti-interference method
  • Composite chaotic sequence forming method and unmanned aerial vehicle measurement and control link anti-interference method
  • Composite chaotic sequence forming method and unmanned aerial vehicle measurement and control link anti-interference method

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Embodiment

[0048] The specific implementation process of the present invention will be described. In the UAV measurement and control link adopted, the effective information rate is 10KHz, the carrier frequency band is 2GHz, the channel coding adopts the RS coding method, and the modulation method adopts BPSK modulation.

[0049] Step 1. Select the type of Chebyshev chaotic sequence, and its mapping equation is x k+1 =f(xk ) = cos(2 n arccos(x k )), the initial value x of the mapping equation 1 = 0.5. Through 64 iterations of the mapping equation, a 64*1 chaotic sequence matrix P is generated;

[0050] Step 2: Select the traditional spread spectrum pseudo-random sequence type as m-sequence, and its generator polynomial is: a1=45H, and the initial value is: a0=3FH. Through 32 iterations of the mapping equation, a 32*1 traditional pseudo-random sequence matrix Q is generated;

[0051] Step 3. Transpose Q of the chaotic sequence matrix P generated in steps 1 and 2 and the traditional p...

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Abstract

The invention discloses a composite chaotic sequence forming method and an unmanned aerial vehicle measurement and control link anti-interference method, and belongs to the field of wireless digital communication. According to the method, a chaotic sequence matrix is multiplied by a traditional pseudo-random sequence transposed matrix, and then obtained matrix row vectors are sequentially splicedand integrated to form a composite chaotic sequence. Meanwhile, based on the formed composite chaotic sequence, the invention provides an anti-interference method for the measurement and control linkof the unmanned aerial vehicle. The chaotic sequence formed by the method has good autocorrelation, cross-correlation and balance characteristics, and the anti-interference performance of the unmannedaerial vehicle measurement and control link in information transmission is improved.

Description

technical field [0001] The invention relates to an anti-jamming method for a UAV measurement and control link based on a composite chaotic sequence, belonging to the field of wireless digital communication. Background technique [0002] With the continuous and rapid development of unmanned aerial vehicle (UAV) and its increasingly wide application in military and industry, higher requirements are put forward for the measurement and control system as the core of UAV information interaction. In order to improve the anti-jamming capability of UAVs, spread spectrum communication systems are usually used in UAV measurement and control links. The spread spectrum communication system has the advantages of good anti-interference performance, strong selective addressing capability, strong confidentiality performance, and strong high-resolution ranging capability. The auto-correlation and cross-correlation of the spread spectrum sequence used in the spread spectrum system directly af...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/71H04L25/03H04L27/00G05D1/10
CPCH04B1/71H04L25/03305H04L27/001G05D1/101Y02D30/70
Inventor 罗婧曹家华毛飞田晓威
Owner HIWING AVIATION GENERAL EQUIP
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