Airborne early warning radar clutter suppression method based on auxiliary channels

An airborne early warning and auxiliary channel technology, applied in the field of radar clutter suppression, can solve the problems of poor airspace error tolerance, large number of array elements, and difficulty in application, so as to reduce the number of samples, improve practical application, and improve airspace error tolerance. Effect

Active Publication Date: 2016-01-06
XIDIAN UNIV
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Problems solved by technology

[0004] In view of the above existing problems in the prior art, the purpose of the present invention is to propose a method for suppressing clutter of airborne early warning radar based on auxiliary channels, which can solve the problem of poor tolerance of the traditional auxiliary channel method to airspace errors and when the

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  • Airborne early warning radar clutter suppression method based on auxiliary channels
  • Airborne early warning radar clutter suppression method based on auxiliary channels
  • Airborne early warning radar clutter suppression method based on auxiliary channels

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[0025] refer to figure 1 , is a schematic flow chart of an airborne early warning radar clutter suppression method based on an auxiliary channel of the present invention, the airborne early warning radar clutter suppression method based on an auxiliary channel, comprising the following steps:

[0026] Step 1, obtain the three-dimensional echo data X received by the airborne early warning radar N×M×L , and accordingly get the three-dimensional echo data X received by the airborne early warning radar N×M×L The airspace frequency θ of the main beam emitted by the formed clutter ridge and the airborne early warning radar s , and then the three-dimensional echo data X received by the airborne early warning radar N×M×L Rearrange in columns to obtain the two-dimensional echo data received by the airborne early warning radar X NM×L ; Wherein, N is the number of elements of the airborne early warning radar, M is the number of pulses that the airborne early warning radar transmits in...

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Abstract

The invention discloses an airborne early warning radar clutter suppression method based on auxiliary channels. The method includes: obtaining three-dimensional echo data received by an airborne early warning radar, obtaining a clutter ridge of the three-dimensional echo data, and thereby obtaining two-dimensional echo data; respectively obtaining num auxiliary channels and num search channels according to the clutter ridge of the three-dimensional echo data, obtaining spatial domain frequency vectors corresponding to the num auxiliary channels and time domain frequency vectors corresponding to the num auxiliary channels, obtaining a dimension-reduction matrix corresponding to the num auxiliary channels and a matrix corresponding to the num search channels in sequence, and thereby obtaining a dimension-reduction matrix for optimizing the auxiliary channels and a conversion matrix based on the auxiliary channels; respectively performing dimension-reduction processing of the two-dimensional echo data and the matrix corresponding to the num search channels, obtaining the echo data after dimension reduction and search channel guiding vectors after dimension reduction, obtaining filtering vectors after dimension reduction, performing clutter suppression processing of the matrix of the num search channels, and obtaining a distance Doppler graph.

Description

technical field [0001] The invention belongs to the technical field of radar clutter suppression, and in particular relates to an airborne early warning radar clutter suppression method based on an auxiliary channel, which is suitable for solving the problem of degradation of airborne early warning radar clutter suppression performance in a non-uniform clutter environment and improving its Clutter suppression performance. Background technique [0002] Airborne early warning radar has been widely valued because it can be deployed flexibly and quickly where it is needed. Its main task is to detect targets in the background of clutter, and to locate and track the detected targets. Suppression is the core of improving the performance of airborne early warning radar. Therefore, before positioning and tracking the detected target, it is first necessary to suppress the clutter or interference existing in the clutter background. If the airborne early warning radar looks down and i...

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Application Information

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IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 王彤张莹莹蔡启程吴建新
Owner XIDIAN UNIV
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