Marine navigation radar signal simulation method

A technology of radar signal and simulation method, which is applied in the field of ship navigation radar signal simulation, which can solve the problems that radar echo cannot express target scattering, structure, orientation and distance characteristics, and the influence and difference of navigator training

Active Publication Date: 2013-05-08
DALIAN UNIV OF TECH
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Problems solved by technology

In the past, the ship navigation radar signal simulator usually obtained the mathematical model of the radar echo signal through theoretical analysis, and then simulated the radar echo. The radar echo obtained by this simulation method cannot express the scattering, structure, orientation and Distance characteristics, there is a big difference between the provided radar echo and the real echo, which has a great impact on the training of navigators

Method used

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  • Marine navigation radar signal simulation method
  • Marine navigation radar signal simulation method

Examples

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Embodiment Construction

[0061] 1) Use computer-aided design methods such as SolidWorks series design methods to establish a ship 3D model library. Detailed information on ship targets can be obtained from magazines, network resources, and on-site photos. The size of the ship must meet the requirements of the high-frequency electromagnetic calculation scaled model. relation.

[0062] 2) Use the professional electromagnetic calculation software FEKO for RCS estimation. The following steps are the operation steps for using FEKO for RCS estimation:

[0063] 1. The 3D ship model exported by SolidWorks is saved in .step format and imported into FEKO for calculation;

[0064] 2. Set the incident parameters and angles of electromagnetic waves;

[0065] 3. To set the frequency of the electromagnetic wave, click the Linearly spaced discrete points of the FEKO software to set the start and end points of the frequency, and the difference between them is the bandwidth of the signal;

[0066] 4. Select the simul...

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Abstract

The invention belongs to the technical field of civil marine navigation, and relates to a marine navigation radar signal simulation method. A three-dimensional computer aided design (CAD) model of an offshore ship target is built by adopting computer aided design technology, predication is conducted to radar scattering sectional area of the target by high-frequency electromagnetic calculation software, the scattering area sectional area is processed so as to obtain a one-dimensional range image of the target, and convolution is conducted to radar transmitted wave form and the obtained one-dimensional range distance; Doppler frequency shift factors are introduced according to states of target motion; distance attenuation factors are introduced according to located position of the target; and low pass filtering is conducted so as to obtain marine navigation radar signal simulation echo through adding a sea clutter model. According to the marine navigation radar signal simulation method, a navigation radar ship target echo sample base which is high in similarity in various characteristic spaces with actual radar echo signals is provided, and radar echo signal sources are provided for teaching and training of navigation radars and seamen.

Description

technical field [0001] The invention belongs to the technical field of civil ship navigation, which uses radar technology, signal processing, computer-aided design technology, high-frequency electromagnetic calculation technology and computer simulation technology to realize the simulation of various ship navigation radar systems, ships with different structures, and different levels of navigation sea conditions The simulated ship target echo signal can realistically reflect the scattering environment of the target radar. Background technique [0002] Ship navigation radar, usually installed in the port vessel traffic management system (VTS) and on ships, can be used for navigation avoidance, ship positioning, narrow waterway piloting and other purposes, and can provide good observation means for mariners when visibility is low. Although most ships are equipped with advanced communication, navigation and navigation aids, various accidents still emerge in endlessly. Analysis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 邱天爽朱勇于松涛孔庆田刘璇李小兵刘惠唐洪刘蓉马征
Owner DALIAN UNIV OF TECH
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