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A Method for Determining the Lower Limit of Pulse Repetition Frequency of Synthetic Aperture Radar

A technology of synthetic aperture radar and pulse repetition frequency, which is applied in the direction of radio wave reflection/re-radiation, utilization of re-radiation, measurement devices, etc., can solve problems such as the design of the lower limit value of the PRF that cannot be directly used for large squint spotlight SAR systems, Achieve the effect of reducing the number of transmitted pulses and reducing the amount of echo data

Active Publication Date: 2017-10-13
XIDIAN UNIV
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Problems solved by technology

Due to the difference in platform motion characteristics, these methods cannot be directly used in the design of the lower limit value of the PRF of the large squint spotlight SAR system in the missile-borne descent section.

Method used

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  • A Method for Determining the Lower Limit of Pulse Repetition Frequency of Synthetic Aperture Radar
  • A Method for Determining the Lower Limit of Pulse Repetition Frequency of Synthetic Aperture Radar
  • A Method for Determining the Lower Limit of Pulse Repetition Frequency of Synthetic Aperture Radar

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Embodiment Construction

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are described by taking the missile-borne synthetic aperture radar as an example.

[0037] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0038] Step 1, determine the Doppler bandwidth of the SAR target echo signal.

[0039] Step 1 specifically includes the following sub-steps...

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Abstract

An embodiment of the invention provides a determination method for a pulse repetition rate lower limiting value of synthetic aperture radar. The determination method can break through restriction of a radar working platform and working modes to obtain the accurate pulse repetition rate lower limiting value. The method comprises the following steps: determining the Doppler bandwidth of a target echo signal of the synthetic aperture radar; determining the Doppler off-centering bandwidth of the target echo signal of the synthetic aperture radar; and according to the sum of the Doppler bandwidth and the Doppler off-centering bandwidth, determining the pulse repetition rate lower limiting value of the synthetic aperture radar.

Description

technical field [0001] The invention belongs to the technical field of synthetic aperture radar, and in particular relates to a method for determining the lower limit of the pulse repetition frequency of the synthetic aperture radar, which can break through the limitations of the radar working platform and working mode, and obtain an accurate lower limit of the pulse repetition frequency. Background technique [0002] The missile-borne Synthetic Aperture Radar (SAR) seeker adopts the spotlight mode in the terminal guidance stage of the missile. By controlling the antenna beam to continuously illuminate the target scene, it can break through the limitation of the radar beam width and realize the two-dimensional height of the target area. Resolution focus imaging provides accurate target scene information for matching and positioning. When designing the Pulse Repetition Frequency (PRF) parameters of the missile-borne SAR system, factors such as azimuth ambiguity setting, range...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/41G01S13/90G01S13/9047G01S13/9041G01S13/9052
Inventor 李亚超邓欢张波全英汇邢孟道
Owner XIDIAN UNIV
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