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Target radiation source initial position estimation method for single-antenna single-station passive positioning

A passive positioning and initial position technology, applied in the field of information processing, can solve problems such as inability to guarantee convergence, easy mutual coupling, and difficulty, and achieve the effect of solving the problem of rapid positioning convergence and reducing system costs.

Active Publication Date: 2017-04-26
YANTAI VOCATIONAL COLLEGE
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Problems solved by technology

The multi-antenna phase interferometer device requires that the spacing between the antenna elements should not be too close, otherwise it is easy to couple with each other, resulting in difficulty or even failure in deambiguation, which will generate false position information of the target radiation source
On the other hand, multi-antenna array elements will also make the problem of receiver channel inconsistency more prominent and difficult to solve. These unfavorable factors are very difficult and tricky in multi-antenna phase interferometer direction finding and positioning devices
[0005] The single-antenna single-station passive positioning system avoids these shortcomings well, but this system needs to solve two problems. One is the estimation of the initial position of the target radiation source. If the initial position estimation error is too far from the real position, the positioning process The convergence cannot be guaranteed; the second is the fast iterative solution method of the positioning process to meet the real-time performance of the device

Method used

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  • Target radiation source initial position estimation method for single-antenna single-station passive positioning
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  • Target radiation source initial position estimation method for single-antenna single-station passive positioning

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Embodiment 1

[0047]Embodiment 1, a method for estimating the initial position of a target radiation source of a single-antenna single-station passive positioning, comprising the following technical measures:

[0048] (1) Target radiation source positioning iterative solution and position estimation;

[0049] (2) The initial estimation of the location of the target radiation source.

[0050] Preferably, the iterative solution for the positioning of the target radiation source and the position estimation include the following steps: assuming that the first-order derivative of the function f(x) exists, that is, f'(x 0 )≠0, in a small area of ​​δ, if x∈B is satisfied c (x 0 ,δ)={x|||x-x 0 || 2 ≤δ}, then the Taylor series expansion of f(x) can be approximated by a first-order term,

[0051] f(x)≈f(x 0 )+(x-x 0 )f'(x 0 )+O(x 0 ) (5)

[0052] In the above formula, O(x 0 ) means x 0 The high-order infinitesimal of , if f(x)=0, get the estimated value of the next iteration

[0053] x ...

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Abstract

The invention discloses a target radiation source initial position estimation method for single-antenna single-station passive positioning. The target radiation source initial position estimation method comprises the technical measures of (1) target radiation source positioning iterative solution and position estimation, and (2) target radiation source position initial estimation. In a single-antenna single-station passive positioning system device, since a satellite platform moves to generate a plurality of different positions, the target radiation source initial position estimation method utilizes TOA to estimate a target radiation source initial position, then utilizes a Taylor series linear term expansion to reduce complexity of positioning iterative calculation, and solves the problem of fast positioning convergence; and the single-antenna single-station electronic reconnaissance positioning system can greatly reduce cost, power consumption, weight and size of the system, and is very suitable for engineering application.

Description

technical field [0001] The invention belongs to the technical field of information processing, and in particular relates to a method for estimating the initial position of a target radiation source for single-antenna and single-station passive positioning. Background technique [0002] The nonlinear least squares method is widely used in applications related to position estimation, including communication, radar and electronic reconnaissance. However, this iterative estimation method is very sensitive to the initial position of the target radiation source. If the initial position of the target radiation source deviates from the real position Far, the nonlinear least squares iterative method may diverge and cannot achieve positioning. The traditional Taylor expansion transforms the nonlinear least squares problem into a first-order linear approximate solution, which will lead to a decrease in positioning accuracy. [0003] In the present invention, we propose a method for es...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02
CPCG01S5/02
Inventor 吴日恒李鹏
Owner YANTAI VOCATIONAL COLLEGE
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