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Single-satellite interference source positioning method of particle swarm algorithm based on grid search

A particle swarm algorithm and grid search technology, applied in the field of single-star interference source positioning, can solve problems such as the decline of positioning accuracy, and achieve the effects of reducing positioning errors, reducing the number of populations, and improving positioning accuracy

Active Publication Date: 2020-04-07
NANJING UNIV OF POSTS & TELECOMM +1
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Problems solved by technology

The experimental surface, in the presence of power errors, will lead to a serious drop in the positioning accuracy of the method

Method used

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  • Single-satellite interference source positioning method of particle swarm algorithm based on grid search
  • Single-satellite interference source positioning method of particle swarm algorithm based on grid search
  • Single-satellite interference source positioning method of particle swarm algorithm based on grid search

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Experimental program
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Embodiment Construction

[0056] The present invention will be further described below in conjunction with the accompanying drawings.

[0057] Such as figure 1 As shown, a kind of single-satellite interference source location method based on grid search particle swarm algorithm provided by the present invention comprises the following steps:

[0058] Step 1. Deduce the interference source position (x, y, z) and θ i The relationship between , where θ i Indicates the angle between the incident direction of the interference source and the center of the beam.

[0059] Such as figure 2 As shown, for the analysis of beam A, in the ground-fixed coordinate system, S is a known satellite, and its position is r S =(x S ,y S ,z S ); A Indicates the angle between the incident direction of the interference signal and the center of the beam A, and the position of the center of the beam A is r A =(x A ,y A ,z A ); the position of the interference source D is r D =(x,y,z), is the unknown quantity to be s...

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Abstract

The invention discloses a single-satellite interference source positioning method of a particle swarm algorithm based on grid search. A traditional single-satellite interference source is positioned,gains generated by an interference source in a plurality of same-frequency wave beams are different in size, a positioning equation set is searched according to the gain difference, and a single-satellite interference source positioning method of a particle swarm algorithm based on grid search is provided. On the basis of a traditional particle swarm algorithm, grid division is introduced to replace search work of part of populations; a grid search link is introduced, so that the population number in particle swarm search can be relatively reduced, and meanwhile, the problem that the positioning precision cannot be further improved due to the limitation of the step length of an example swarm algorithm near an optimal solution is also solved.

Description

technical field [0001] The invention relates to the technical field of satellite positioning, and mainly relates to a single-satellite interference source positioning method based on grid search particle swarm algorithm. Background technique [0002] Communication satellites often work in open space. For GEO communication satellites that use large-scale spread-out multi-beam antennas, while the receiving sensitivity is improved, they are vulnerable to various interferences. The traditional three-star and double-star positioning methods require the coordination of multiple qualified satellites, which is not the best choice for GEO satellites with limited orbital resources. Therefore, a single-satellite positioning technology based on multi-beam antennas is proposed, which can avoid the difficulty of selecting adjacent satellites while saving orbital resources. Experimental results show that in the presence of power errors, the positioning accuracy of this method will be seve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/42
CPCG01S19/42
Inventor 赵来定阮岑张更新
Owner NANJING UNIV OF POSTS & TELECOMM
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