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Optimal Amplitude Radio Direction Finding Method

A radio direction finding and optimization technology, which is applied to direction finders using radio waves, radio wave direction/deviation determination systems, etc., can solve the problems of low direction finding sensitivity, low antenna gain, and steep changes, etc., to achieve measurement The effect of high direction accuracy, high direction finding sensitivity, and low consistency requirements

Active Publication Date: 2018-07-27
CHENG DU DIAN ZHEN TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] 2. Although the minimum signal method has high direction finding accuracy, the direction finding sensitivity is not high and the direction finding speed is slow
Because on the one hand, the pattern of the directional antenna changes steeply near the minimum gain angle, but the antenna gain is low here; on the other hand, a large number of antenna azimuth-signal strength data pairs are needed to obtain the antenna azimuth where the maximum signal is located
[0007] 3. The existing amplitude comparison method, the amplitude comparison is realized by the circuit, has high requirements for the consistency of the components, is difficult to debug, and can only perform real-time direction finding
[0008] Second, with the rapid development of radio technology, new technologies such as high-speed frequency hopping, spread spectrum, time-division multiplexing, and complex modulation have been more and more widely used. Increasingly, the use of traditional technical means to monitor radio signals faces many difficulties, and it is difficult to perform direction finding on transient signals and signals of the same frequency with different instantaneous transmission probabilities
But so far it has not been used in the field of radio direction finding

Method used

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Examples

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Embodiment 1

[0026] As a preferred embodiment of the present invention, this embodiment discloses:

[0027] Optimizing the radio direction finding method of ratio amplitude, comprising the following steps:

[0028] Data acquisition step: use a directional antenna with known directional characteristics and a directional antenna to test at no less than 3 obviously different azimuth angles to obtain antenna azimuth angles and corresponding signal strength data;

[0029] Modeling steps: Optimizing modeling, taking the radio signal azimuth as the decision variable, taking the cumulative amount of the deviation between the measured signal strength at a specific frequency and a specific instantaneous probability at different azimuths and the signal strength calculated according to the antenna direction characteristics As the objective function, an unconstrained nonlinear programming model is established;

[0030] Calculation steps of direction finding: calculate by optimization algorithm, solve ...

Embodiment 2

[0032] As another preferred embodiment of the present invention, this embodiment discloses:

[0033] Optimizing the radio direction finding method of ratio amplitude, comprising the following steps:

[0034] Data acquisition step: use a directional antenna with known directional characteristics and a directional antenna to test at no less than 3 obviously different azimuth angles to obtain antenna azimuth angles and corresponding signal strength data;

[0035]Modeling steps: Optimizing modeling, taking the radio signal azimuth as the decision variable, taking the cumulative amount of the deviation between the measured signal strength at a specific frequency and a specific instantaneous probability at different azimuths and the signal strength calculated according to the antenna direction characteristics As the objective function, an unconstrained nonlinear programming model is established;

[0036] Calculation steps of direction finding: calculate through the optimization alg...

Embodiment 3

[0040] As another preferred embodiment of the present invention, this embodiment discloses:

[0041] Optimizing the radio direction finding method of ratio amplitude, comprising the following steps:

[0042] Data acquisition step: use a directional antenna with known directional characteristics and a directional antenna to test at no less than 3 obviously different azimuth angles to obtain antenna azimuth angles and corresponding signal strength data;

[0043] Modeling steps: Optimizing modeling, taking the radio signal azimuth as the decision variable, taking the cumulative amount of the deviation between the measured signal strength at a specific frequency and a specific instantaneous probability at different azimuths and the signal strength calculated according to the antenna direction characteristics As the objective function, an unconstrained nonlinear programming model is established;

[0044] Calculation steps of direction finding: calculate through the optimization al...

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Abstract

The invention discloses an optimization amplitude comparison radio direction finding method and relates to the technical field of radio direction finding. According to the optimization amplitude comparison radio direction finding method, a directional antenna of which a direction characteristic is known is used for receiving radio signals at azimuth angles that are markedly different, the radio signals that are received are subjected to processing operation, and an optimization method is used for direction finding. A fixed antenna of a digital fluorescence frequency spectrum is used for radio direction finding in a pioneering manner, and problems of rapid direction finding of transient signals and co-frequency signals can be solved. An aim of the invention is to find a method for realizing synchronous broadband and multi-frequency direction finding as well as fluorescence frequency spectrum direction finding, wherein the method is high in sensitivity, high in accuracy and low in requirements for consistency of parts.

Description

technical field [0001] The invention relates to the technical field of radio direction finding, and more specifically relates to a radio direction finding method with optimized amplitude ratio. Background technique [0002] On the one hand, the development of society promotes the rapid development of the radio industry. As an important technical means for radio monitoring, technical investigation and electronic countermeasures, radio direction finding technology has attracted more and more attention from the industry. According to different direction finding principles, direction finding systems can be divided into amplitude method, phase method, Doppler method, time difference method and spatial spectrum estimation method, etc. [0003] The amplitude direction finding system is widely used in the field of radio direction finding because of its simple structure and stable performance. The amplitude method can be subdivided into the maximum signal method (also known as the l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S3/14
CPCG01S3/14
Inventor 邱承跃白宇军
Owner CHENG DU DIAN ZHEN TECH
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