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Radar signal detection method for spatial correlation clutter suppression

A technology of clutter suppression and radar signal, which is applied in the radar system with high resolution and distance resolution, and the radar signal detection field of space-correlated clutter suppression, can solve the problems of radar detection probability fluctuation, etc., and achieve wide applicability and high flexibility Effect

Active Publication Date: 2021-03-19
BEIJING INST OF REMOTE SENSING EQUIP
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Problems solved by technology

[0003] The invention relates to a radar signal detection method for space-correlated clutter suppression, which is especially suitable for radar systems with high resolution and range resolution, and solves the problem of radar detection probability fluctuations at the same signal-to-clutter ratio under the background of space-correlated clutter

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  • Radar signal detection method for spatial correlation clutter suppression
  • Radar signal detection method for spatial correlation clutter suppression
  • Radar signal detection method for spatial correlation clutter suppression

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Embodiment Construction

[0008] The present invention proposes a radar signal detection method for spatial correlation clutter suppression, figure 1 shown, which includes:

[0009] S101. Preliminarily select the order m of the adaptive regression model according to the number of range units of the high-resolution range profile.

[0010] S102. Further optimize the order m of the adaptive regression model according to the target resolution of the high-resolution range image to obtain an optimized order m′.

[0011] S103. Obtain a high-resolution range image of the radar echo by using an adaptive regression model with an optimized second order m′.

[0012] S104. Determine the threshold factor T according to the false alarm probability, referring to the size of the unit R and the selected ranking number k.

[0013] S105 , according to the calculated average clutter power Z in the reference unit multiplied by the threshold factor T, and then comparing with the detected unit power D, to determine whether ...

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Abstract

The invention discloses a radar signal detection method for spatial correlation clutter suppression. The method comprises the steps of (1) primarily selecting the order of an adaptive regression modelaccording to the number of distance units of a high-resolution range profile; (2) further optimizing the order of the adaptive regression model according to the target resolution of the high-resolution range profile; (3) obtaining the high-resolution range profile of radar echoes through processing of the adaptive regression model with the optimized order; (4) calculating a threshold factor according to the false alarm probability, the number of reference units and the selected sorting number; and (5) multiplying the clutter average power in the reference units by the threshold factor, comparing with the power of a detected unit, and judging whether a target exists or not. The method is suitable for a radar system with high resolution range resolution, and solves a problem of radar detection probability fluctuation under the same signal-to-clutter ratio under the background of spatial correlation clutter.

Description

technical field [0001] The invention relates to the technical field of radar signal detection, in particular to a radar signal detection method for space-correlated clutter suppression, which is especially suitable for radar systems with high-resolution range resolution, and solves the problem of radar with the same signal-to-clutter ratio under the background of space-correlated clutter. Detect the problem of fluctuating probabilities. Background technique [0002] The spatial correlation of clutter signals refers to the correlation between two separated reflected signals, that is, the correlation of the mean values ​​of clutter from different clutter distance cells. One interpretation of the current research on the spatial correlation of clutter is that the spatial correlation of clutter is related to the radar pulse width. The interval required to obtain two statistically independent echoes is about the distance corresponding to one pulse width, that is, the correlation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 白剑
Owner BEIJING INST OF REMOTE SENSING EQUIP
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