Method for identifying range ambiguity and azimuth ambiguity of ring-scan radar

A technology of distance ambiguity and azimuth ambiguity, applied in the space field, can solve problems such as increasing the complexity of radar hardware equipment radar timing, and achieve the effect of simplifying timing design and improving confidence

Pending Publication Date: 2021-02-12
XIAN INSTITUE OF SPACE RADIO TECH
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  • Method for identifying range ambiguity and azimuth ambiguity of ring-scan radar
  • Method for identifying range ambiguity and azimuth ambiguity of ring-scan radar
  • Method for identifying range ambiguity and azimuth ambiguity of ring-scan radar

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[0085]Example

[0086]Using the simulation parameters in Table 1, the azimuth ambiguity simulation of the ring scan radar is carried out.

[0087]Table 1 Azimuth fuzzy simulation parameters

[0088] Simulation parameters Value Platform height 5000m Platform speed 200m / s Perspective 60° Elevation beam width 20° Azimuth beam width 10° Antenna rotation speed 60° / s Antenna pattern Sinc function without window Carrier frequency 10GHz PRF 4000Hz

[0089]Figure 7 Under the above parameters, the position of the azimuth blur of the circumnavigation radar in the adjacent split-scene image is indicated, which are the energy distribution of the circumscribed radar echo direction (top), the slope distance (middle), and the target energy change in the image (bottom) Correspondence, abscissa taIs the slow time, R(ta) Is the slow time change function of the slope distance.Figure 8 For the same goal (andFigure 7 Correspondingly) Focusing results in adjacent 5 frames, for comparison, only the area around...

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Abstract

The invention provides a method for identifying range ambiguity and azimuth ambiguity of a ring-scan radar, and the method comprises the steps: building a position and energy corresponding model of arange ambiguity target and a real target of the ring-scan radar, and identifying whether a to-be-outputted target is a range ambiguity false alarm or not; whether a to-be-output target is an azimuth fuzzy false alarm is identified by establishing a position and energy corresponding model of a loop sweep radar azimuth fuzzy target and a real target, and if the target is a false alarm caused by thetwo kinds of fuzziness, the false alarm is eliminated, so that the false alarm rate of the system is reduced, and the confidence of radar detection of the target is enhanced.

Description

technical field [0001] The invention relates to a distance ambiguity and azimuth ambiguity discrimination method for a ring scan radar, which belongs to the field of space technology. Background technique [0002] Ring scan radar is mainly used for wide area sea surface ship target detection. Similar to SAR, ring scan radar improves two-dimensional resolution through range-oriented pulse compression and azimuth synthetic aperture processing, and performs target detection in ring scan images. Similarly, ring scan radar must also have range ambiguity and azimuth ambiguity. [0003] When there is a target with strong RCS in the blurred area (distance blurred area or Doppler blurred area), the signal blurred to the main energy area will still be significantly higher than the clutter background, thus forming a false target, so it is necessary to form a The distance ambiguity and azimuth ambiguity can be effectively identified to reduce the false alarm rate of target detection. ...

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/414
Inventor 张选民李诗润刘昕牛文博党红杏王万林谭小敏
Owner XIAN INSTITUE OF SPACE RADIO TECH
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