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Clutter suppression and parameter estimation method based on Relax algorithm in WAS-GMTI mode

A technology of clutter suppression and parameter estimation, applied in radio wave measurement systems, instruments, etc., can solve the problems of clutter filter performance degradation, large errors, etc., to achieve excellent clutter suppression effect, and achieve the effect of accurate estimation

Inactive Publication Date: 2017-06-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

This is because the STAP algorithm needs to use the information of adjacent units to estimate the clutter-plus-noise covariance matrix of the unit in practical applications. In the non-uniform clutter environment, the estimated covariance matrix often has large errors. resulting in degraded performance of the clutter filter

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  • Clutter suppression and parameter estimation method based on Relax algorithm in WAS-GMTI mode
  • Clutter suppression and parameter estimation method based on Relax algorithm in WAS-GMTI mode
  • Clutter suppression and parameter estimation method based on Relax algorithm in WAS-GMTI mode

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Embodiment Construction

[0036] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention All modifications of the valence form fall within the scope defined by the appended claims of the present application.

[0037] A clutter suppression and parameter estimation method based on Relax algorithm in WAS-GMTI (wide area monitoring) mode, such as figure 1 , 2 shown, including the following steps:

[0038] Step 1, data preprocessing: The echoes received in the wide-area monitoring mode are respectively subjected to range-to-pulse pressure and azimuth-to-FFT transformations, that is, the data is transformed into the range-Doppler domain for further processing, and the range-Dop...

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Abstract

The invention discloses a clutter suppression and parameter estimation method based on a Relax algorithm in a WAS-GMTI mode, and belongs to the technical field of radar target detection. The invention designs an iterative method of clutter suppression according to the characteristic of wide area monitoring mode echo composition and combined with the Relax algorithm. Then on the basis of clutter suppression, iteration continues to be performed on distance-Doppler units where moving targets exist, and thus precise estimation of parameters of the moving target can be realized.

Description

technical field [0001] The invention relates to a clutter suppression and parameter estimation method based on a Relax algorithm in a WAS-GMTI mode, and belongs to the technical field of radar target detection. Background technique [0002] The wide-area surveillance mode enables large-area surveillance by means of rapid, periodic scanning of the beam along the track. This mode has a high revisit rate and can detect moving targets from different angles, thereby improving the detection probability of moving targets. In addition, since the moving target can be scanned multiple times at different times, it is possible to describe the trajectory of the moving target and realize the tracking of the moving target. This working mode can quickly provide moving target information in a wide area, so it has great application value in civil and military applications, and has become one of the indispensable working modes of airborne reconnaissance radar. [0003] Extracting moving targ...

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/414
Inventor 闫贺王旭东朱岱寅李勇张劲东
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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