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A Target Filtering Method for Airborne Early Warning Radar Ground Expressway

An airborne early warning and expressway technology, applied in the field of radar, can solve problems such as application restrictions

Inactive Publication Date: 2017-08-22
汤子跃 +2
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Problems solved by technology

[0004] In addition to using speed information, the two types of targets can also be classified by the height difference between the ground target and the air target, so as to complete the filtering of the ground target, such as the work of judging the target according to the separation degree of the direct wave and the multipath in the time domain height, but this type of method requires the radar to use a broadband signal, and its application is limited

Method used

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  • A Target Filtering Method for Airborne Early Warning Radar Ground Expressway
  • A Target Filtering Method for Airborne Early Warning Radar Ground Expressway
  • A Target Filtering Method for Airborne Early Warning Radar Ground Expressway

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Embodiment Construction

[0038]The height of the airborne early warning radar in the system is 8km, and the speed of the aircraft is 160m / s. The radar adopts the ground-to-ground working mode, and emits four groups of different PRF pulses within a beam dwell time. The number of PRF pulses in each group The number of antenna arrays is 64, the number of antenna arrays is 16×64, plus -40dB Chebyshev weight, the wavelength is 0.3m, the beam pointing is (90°, 2°), that is, the front side view, the downward viewing angle of 2° direction, and the distance resolution The range is 150m, the maximum range is 400km, and the Doppler velocity threshold is set to 35m / s.

[0039] refer to figure 1 , the classification criterion steps of the present invention are as follows:

[0040] Step 1: Sampling and processing the echo data

[0041] The mixed intermediate frequency signal is converted into a digital signal through an A / D converter, and pulse pressure processing is performed on each pulse signal. Each pulse is ...

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Abstract

The name of the present invention is a ground expressway target filtering method for airborne early warning radar, and the present invention belongs to the field of radar technology, in particular, it is an airborne early warning radar ground target filtering method based on Doppler characteristics. The technical problem to be solved is to correctly identify the track of the ground highway target and the air target generated by the airborne early warning radar, so as to filter the interference track of the ground target. The present invention is mainly based on the difference in Doppler characteristics between the ground expressway target and the air target, including the magnitude of the Doppler velocity and the positive or negative nature of the Doppler frequency, as well as the distribution difference between the two in distance, and designs a Target classification criteria, to complete the correct identification and classification of two types of targets. The invention has a higher recognition probability for ground targets and air targets, thereby being able to better filter ground targets. The invention can be used for target track optimization of airborne early warning radar.

Description

technical field [0001] The invention belongs to the technical field of radar, and specifically relates to a ground target filtering method based on Doppler characteristics, which is used for track optimization of airborne early warning radar targets. Background technique [0002] Airborne early warning radar usually adopts the pulse Doppler (PD) system, which has many advantages such as good low-altitude detection performance, wide surveillance range, and strong survivability. However, in areas with developed traffic, such as cities and highways, there are a large number of moving targets with relatively large RCS, so the airborne early warning radar will detect a large number of ground targets during its downward-looking work, resulting in frequent batches and broken batches. Interference track. This not only increases the difficulty for radar intelligence personnel to conduct intelligence analysis and air situation judgment, but also easily causes the work saturation of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/58G01S7/483
Inventor 汤子跃朱振波韩伟战立晓汪枫石绍应张袁鹏
Owner 汤子跃
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