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Space-time adaptive processing method for airborne forward-looking array radar

A technology of space-time self-adaptation and processing method, which is applied in the detection of short-range ground moving targets of airborne forward-looking array radar, the clutter suppression and moving target detection of airborne phased array radar, and the space-time detection of airborne forward-looking array radar. In the field of time-adaptive processing, it can solve the problems of clutter suppression performance loss, beam pattern distortion, difficulty in obtaining training samples, etc., to achieve the effect of speeding up the convergence speed, protecting energy, and reducing the amount of calculation.

Inactive Publication Date: 2017-01-25
XIDIAN UNIV
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Problems solved by technology

The training samples of these two methods are polluted by the pitch main lobe clutter signal, which easily leads to beam pattern distortion and target cancellation
Although the ERCB algorithm adopts the diagonal loading technique to keep the main beam shape, a large loading factor will lead to a large loss of clutter suppression performance
Three-dimensional STAP has the ability to suppress range ambiguity clutter, but it is difficult to obtain enough independent and identically distributed training samples in the clutter environment with serious range non-stationarity

Method used

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  • Space-time adaptive processing method for airborne forward-looking array radar
  • Space-time adaptive processing method for airborne forward-looking array radar
  • Space-time adaptive processing method for airborne forward-looking array radar

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with accompanying drawing:

[0026] refer to figure 1 , is a brief flow chart of the space-time adaptive processing method of the airborne forward-looking array radar of the present invention. The space-time adaptive processing method of the airborne forward-looking array radar comprises the following steps:

[0027] Step 1, use the airborne forward-looking array radar to transmit a coherent pulse train composed of K pulses, and use the receiving array of the airborne forward-looking array radar to receive echo data; the airborne forward-looking array radar is a pulse Doppler radar, and the The receiving array of the forward-looking array radar is composed of N columns of uniformly arranged array elements, and each array element is composed of M nThe array elements are uniformly arranged, and the total number of range gates of the airborne forward-looking array radar is L. Obtain the data vector x o...

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Abstract

The invention belongs to the technical field of radar moving target detection, and particularly relates to a space-time adaptive processing method for airborne forward-looking array radar. The method includes the specific steps of obtaining a data vector xnk1, received by the kth pulse of the nth line of array elements of a receiving array of the airborne forward-looking array radar, of a first distance door, obtaining the data vectors, recorded by the nth line of array elements of the receiving array of the airborne forward-looking array radar, of selected distance doors recorded within the time period of [KT, (K+1)T], obtaining the estimation (please see the specifications) of the dimensionality reduction pitching covariance matrix of the first distance door of the nth line of array elements of the receiving array of the airborne forward-looking array radar, obtaining the dimensionality reduction self-adaption weight vector omega E of the first distance door of the nth line of array elements of the receiving array of the airborne forward-looking array radar, obtaining the data vector ynk1, received by the kth pulse of the nth line of array elements of the receiving array of the airborne forward-looking array radar, of the first distance door after pitching pre-filtering is conducted, and obtaining the signal of the kth Doppler channel of the first distance door of the airborne forward-looking array radar through the orientation-Doppler space-time adaptive processing method after the space-time adaptive processing is conducted.

Description

technical field [0001] The invention belongs to the technical field of radar moving target detection, and in particular relates to a space-time adaptive processing method of an airborne forward-looking array radar, which can be specifically used for the detection method of an airborne forward-looking array radar short-distance ground moving target, and is suitable for airborne phase control Array radar for clutter suppression and moving target detection. Background technique [0002] The ground moving target indication (GMTI) function of airborne forward-looking array radar has a wide range of military application prospects. For example, it is used in airborne fire control radar to find and guide airborne weapons to attack enemy tanks, armored vehicles or mobile missile launchers. Degraded detection and tracking deficiencies (long-range surveillance systems are easily obscured by tall buildings when detecting ground moving objects in cities). The main problem faced by the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/36G01S13/50
CPCG01S7/36G01S13/505
Inventor 王彤陈华彬文才吴建新
Owner XIDIAN UNIV
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