Unlock instant, AI-driven research and patent intelligence for your innovation.

Space-air-ground network unmanned aerial vehicle anti-interference attack method based on relay and beam forming

A beamforming and unmanned aerial vehicle technology, applied in the direction of space transmission diversity, radio transmission system, diversity/multi-antenna system, etc., can solve the problem of not making full use of unmanned aerial vehicle cooperation, so as to improve the overall anti-interference ability, The effect of improving bandwidth utilization

Active Publication Date: 2021-02-02
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a UAV anti-jamming attack based on relay and beamforming for the UAV network anti-jamming method in the existing air-space-ground network that does not fully utilize the advantages of UAV cooperation. method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Space-air-ground network unmanned aerial vehicle anti-interference attack method based on relay and beam forming
  • Space-air-ground network unmanned aerial vehicle anti-interference attack method based on relay and beam forming
  • Space-air-ground network unmanned aerial vehicle anti-interference attack method based on relay and beam forming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment combines the attached figure 1 The specific implementation process of the present invention "Anti-jamming attack method for air-space-ground network drones based on relay and beamforming" in the presence of intergroup interference, jammers, and ground satellite node interference is described in detail.

[0032] The symbols used in Example 1 and their meanings are shown in Table 1 below.

[0033] Table 1 Symbols and their corresponding meanings

[0034]

[0035]

[0036] Such as figure 1 In the communication environment shown, the high-orbit satellite communicates with the ground satellite user node, and the low-orbit satellite U communicates with the UAV group. While receiving low-orbit satellite signals, UAVs will also receive interference signals from jammers, inter-group interference signals sent by low-orbit satellite U to other groups of UAVs, interference signals from ground satellite user nodes, and Gaussian white noise. After receiving t...

Embodiment 2

[0069] This embodiment combines the attached figure 2 The specific solution process of the optimization problem shown in formula (3) among the embodiment 1 has been set forth, such as flow process figure 2 As shown, the specific steps are:

[0070] Step (1): Use Γ i，j Equivalently replace the objective function in the optimization problem shown in formula (3) Add new constraints¶ i，j ≥Γ i，j ,

[0071] Step (2): according to the formula (2) to the new constraints in step (1) γ i，j ≥Γ i，j Approximate, the approximate expression is shown in formula (9):

[0072]

[0073] In formula (9), s=[s 1 ,s 2 ,...,s G ] is a complex vector of 1×(D×G), s (i) is the ath iteration result of parameter s, h=[h i , h i ,...,h i ] is a complex vector of 1×(D×G), is the parameter Γ i，j The ath iteration result of .

[0074] make

[0075] According to the approximate result of formula (9), the optimization problem shown in formula (3) can be transformed into the form of ...

Embodiment 3

[0086] This embodiment combines the attached image 3 The specific solution process of the optimization problem shown in formula (7) in embodiment 1 has been set forth, and the solution process is as flow process image 3 shown, combined with the attached Figure 4, compared and analyzed the frequency band utilization of each UAV in the case of relaying UAVs with or without relaying satellite signals. The comparison simulation diagram is as follows Figure 4 shown.

[0087] The specific steps for solving the optimization problem shown in formula (7) in embodiment 1 are:

[0088] Step A: Use equivalent replacement objective function add new constraint

[0089] Step B: According to the formula (6) to the new constraints in step A Approximate, the approximate expression is shown in formula (11):

[0090]

[0091] In formula (11), is 1×(U Ri × U Vi ), the complex vector of u (b) is the bth iteration result of parameter u, g=[g ik , g ik ,..., g ik ] is 1×(U ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a space-air-ground network unmanned aerial vehicle anti-interference attack method based on relay and beam forming, and belongs to the technical field of communication anti-interference. The method comprises the following steps: 1) sending a satellite signal to an unmanned aerial vehicle group via a low-orbit satellite U in a multi-group multicast mode with a proper beam weight value; 2) traversing each unmanned aerial vehicle group, and when interference exists and the unmanned aerial vehicle groups receive satellite signals, judging whether the unmanned aerial vehicles in the groups are relayed or disturbed unmanned aerial vehicles; 3) traversing each unmanned aerial vehicle group, and forwarding the signal received by the unmanned aerial vehicle group in the step 2) to the disturbed unmanned aerial vehicle in the group in a decoding and forwarding manner according to the cooperative beam weight value under the cooperation of the relay unmanned aerial vehiclein the group; 4) after successfully receiving and decoding the satellite signal, carrying out communication with the ground unmanned aerial vehicle nodes within the coverage of the respective unmanned aerial vehicles. According to the method, the anti-interference capability of the unmanned aerial vehicle group and the frequency band utilization rate of the unmanned aerial vehicle network can beintegrally improved in the presence of interference attacks.

Description

technical field [0001] The invention relates to an anti-jamming attack method for an air-space-ground network unmanned aerial vehicle based on relay and beamforming, and belongs to the technical field of communication anti-jamming. Background technique [0002] With the continuous advancement of satellite communication and mobile communication technology, the construction of UAV network has become a current research hotspot. The current research on UAV communication mainly focuses on UAV as an auxiliary or substitute base station to provide communication services. For example, in the post-disaster reconstruction process, when the base station in the disaster area is severely damaged and cannot provide communication services, the UAV can temporarily replace the base station to provide communication services. UAVs are used as relays to realize data transmission in areas without public network coverage, such as using UAV relay systems to collect data from environmental monitori...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04B7/06H04B7/08H04B7/155H04B7/185
CPCH04B7/0617H04B7/0897H04B7/15564H04B7/18508H04B7/18515
Inventor 于季弘巩玥
Owner BEIJING INSTITUTE OF TECHNOLOGYGY