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Sky wave and ground wave hybrid radar echo spectrum simulating method

A technology of radar echo and simulation method, which is applied to radio wave measurement systems, instruments, etc., and can solve problems such as increasing the complexity of signal processing algorithms and processing steps, and complex target positioning

Active Publication Date: 2014-12-17
HARBIN INST OF TECH
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  • Abstract
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Problems solved by technology

However, its target positioning is relatively complicated, and its propagation modes are diverse, which increases the complexity of its signal processing algorithms and processing steps.

Method used

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  • Sky wave and ground wave hybrid radar echo spectrum simulating method
  • Sky wave and ground wave hybrid radar echo spectrum simulating method
  • Sky wave and ground wave hybrid radar echo spectrum simulating method

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0040] figure 1 It is a flow chart of the method of the present invention. Firstly, the radar detection area is analyzed according to the location of the radar transmitter and receiver and the ionospheric parameters; secondly, the electromagnetic wave propagation attenuation is calculated according to the sea state parameters and ionosphere parameters; then the sea state information simulates the first and second order sea clutter; Position information and background noise are used to calculate the target signal-to-noise ratio to obtain the radar echo spectrum.

[0041] figure 2 It is the electromagnetic wave propagation path diagram of the space-ground wave hybrid radar. In the figure, X is the radar transmitting station, W is the radar receiving station, T is the target position, M is the ionospheric emission vertex, H is the corresponding equiva...

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Abstract

The invention discloses a sky wave and ground wave hybrid radar echo spectrum simulating method. The method comprises the following steps of calculation on positioning of an object of a sky wave and ground wave radar, calculation on transmission attenuation, simulation on a radar echo spectrum under the background of noise and simulation on a radar echo spectrum under the background of sea clutter. A complete process of a sky wave and ground wave hybrid radar is completely shown from an objective positioning model; in the complete process, a sky wave radar transmits high-frequency electromagnetic waves, a ground wave receiving station receives sea echo and also receives noise, attenuation and clutter in the process, and the final echo spectrum shows that the radar with the novel system can detect a given object on a certain sea surface really; and the detection performance of the radar in the type is analyzed, and a certain reference is provided for later research on a novel processing algorithm and construction of a guiding position.

Description

Technical field: [0001] The invention relates to a method for simulating echo spectrum of space-ground wave mixed radar. Background technique: [0002] High-frequency over-the-horizon radar (HF-OTHR) can be divided into sky-wave over-the-horizon radar and ground-wave over-the-horizon radar according to its radio wave propagation mode. Although sky-wave over-the-horizon radar (referred to as sky-wave radar) can achieve detection of 1000-4000 kilometers, it is limited by the elevation angle of the transmitting antenna and the electron concentration in the ionosphere. Disturbance effect. Ground-wave over-the-horizon radar (referred to as ground-wave radar) can reach air / sea targets at a range of 100-300 kilometers, and the propagation path is relatively stable. However, due to the limitation of its working mechanism, the transmitter is usually deployed in coastal areas. The safety is greatly reduced, and the ability to resist destruction is also poor. For this reason, radar ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
CPCG01S7/4052
Inventor 侯成宇陈迪夏添李达
Owner HARBIN INST OF TECH
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