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Adaptive anti-interference method for satellite navigation system based on 2-norm multi-target optimization

A satellite navigation system, multi-objective optimization technology, applied in satellite radio beacon positioning system, radio wave measurement system, measurement device, etc., can solve problems such as excessive calculation, difficult hardware implementation, wide zero trap depth, etc., to achieve The effect of small calculation, reduced resource occupation, and improved positioning accuracy

Active Publication Date: 2017-01-11
BEIHANG UNIV
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Problems solved by technology

[0019] The purpose of the present invention is to solve the problem of wide null depth and multiple "small nulls" in the direction diagram mentioned in the existing blind anti-jamming algorithm, and other existing improved algorithms for this problem are too computationally intensive and For the problem that the hardware is difficult to implement, it is proposed to use the 2-norm of the matrix to add 2-norm constraints to the optimization problem of the blind anti-jamming algorithm to form an anti-jamming algorithm for multi-objective function optimization, and use the inverse method and iterative method to solve all the problems. The optimal weight of the algorithm

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  • Adaptive anti-interference method for satellite navigation system based on 2-norm multi-target optimization
  • Adaptive anti-interference method for satellite navigation system based on 2-norm multi-target optimization
  • Adaptive anti-interference method for satellite navigation system based on 2-norm multi-target optimization

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[0045] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0046] The present invention is a satellite navigation system adaptive anti-jamming method based on two-norm multi-objective optimization, the process is as follows figure 1 shown, including the following steps:

[0047] Step 1: Construct the direction vector and constraint condition formula. The present invention proposes adding in the anti-interference criterion the condition that the signal remains unchanged in directions other than interference, namely W H α=1, where α is the steering vector of the signal in any direction. The matrix 2 norm is used to realize the restriction in all directions, that is, the minimum.

[0048] | | W H A - 1 | | 2 2 - - - ( 5 )

[0049] Among them: ...

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Abstract

The invention discloses an adaptive anti-interference method for a satellite navigation system based on 2-norm multi-target optimization, and the method comprises the following steps: 1, constructing a direction vector and a constraint condition; 2, simplifying the constraint condition; 3, constructing a multi-target optimization anti-interference criterion; 4, solving the optimal solution to the multi-target optimization anti-interference criterion. According to the invention, a 2-norm matrix optimization function which enables the antenna gain in all directions to be constant is added to a single optimization function of a conventional blind anti-interference algorithm, thereby enabling an original optimization problem to be converted into multi-target optimization from single-target optimization, enabling the antenna gains in all directions to tend to be constant, and solving the problems that a directional diagram null steering opening is large in width in the blind anti-interference algorithm and the gains in non-interference directions are not flat.

Description

technical field [0001] The invention belongs to the field of anti-jamming of satellite navigation systems, in particular to an adaptive anti-jamming method for satellite navigation systems based on two-norm multi-objective optimization. Background technique [0002] Since the Global Navigation Satellite System (GNSS), including the GPS (Global Positioning System) system of the United States, the GLONASS system of Russia and the Beidou satellite navigation system of China, have been put into use, satellite navigation has played an important role in both civilian and military fields. Extremely important role, from personal location navigation, time service, surveying and mapping to military navigation, GNSS has become an indispensable part of people's life and military applications. [0003] On the one hand, due to the extremely weak satellite navigation signal, the signal is affected by various complex electromagnetic environments during the signal propagation from the satell...

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Application Information

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IPC IPC(8): G01S19/21G01S19/24
CPCG01S19/21G01S19/24
Inventor 郎荣玲肖宏李武涛
Owner BEIHANG UNIV
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