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RELAX-based air multi-maneuvering target detecting and parameter estimating method

A technology for parameter estimation and maneuvering targets, which is applied to measurement devices, radio wave measurement systems, and radio wave reflection/re-radiation.

Inactive Publication Date: 2012-08-01
CIVIL AVIATION UNIV OF CHINA
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However, when the above method is directly extended to the multi-target situation, the weak target signal in the unit to be detected will be affected by the strong target signal. As a result, this method can only detect strong target signals, but cannot perform well on other weak target signals. ground detection

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  • RELAX-based air multi-maneuvering target detecting and parameter estimating method

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[0029] The RELAX-based aerial multi-maneuvering target detection and parameter estimation method provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] figure 1 The flow chart of the RELAX-based air multi-maneuvering target detection and parameter estimation method provided by the present invention. All the operations are completed in the airborne computer system with the computer as the core, and the main body of the operation is the airborne computer system.

[0031] Such as figure 1 Shown, the multi-maneuvering target detection and parameter estimation method in the air based on RELAX provided by the present invention comprises the following steps carried out in order:

[0032] 1) Perform clutter suppression on the total echo data received by the airborne early warning radar: In this stage, the subspace projection technology is used to suppress the clutter on the total echo data ...

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Abstract

The invention provides a RELAX-based air multi-maneuvering target detecting and parameter estimating method. The method comprises the following steps of: 1) carrying out clutter rejection on aggregate echo data received by an airborne early warning radar; 2) estimating the parameter of a strong target signal; 3) estimating the parameter of a weak target signal; and 4) further modifying the parameter of the strong target signal, etc. According to the RELAX-based air multi-maneuvering target detecting and parameter estimating method provided by the invention, a rebuilding time sampling technology is combined with a RELAX algorithm, and the influence of the strong target signal component to the weak target signal component in the process of detecting can be effectively restrained, so that when a plurality of targets exist in an unit to be detected, a good parameter estimating result can be obtained, and in the case of limited number of pulse points, the method is still very high in the parameter estimating precision.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, in particular to a RELAX-based air multi-moving target detection and parameter estimation method. Background technique [0002] The airborne early warning radar based on the high-altitude motion platform is in the working state of looking down, and it faces more complex ground (sea) clutter problems than the ground-based radar, which makes the target detection and parameter estimation very difficult. Space-Time Adaptive Processing (Space-Time Adaptive Processing, STAP) is an effective means of ground clutter suppression for airborne radar. The traditional STAP method assumes that there are many target echoes within the Coherent Processing Interval (CPI). The Doppler frequency is constant (that is, the target moves at a constant speed), but when the target performs maneuvers such as changing speed and turning, the Doppler frequency of the target echo will change with time within on...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41G01S13/88
Inventor 李海吴仁彪王小寒
Owner CIVIL AVIATION UNIV OF CHINA
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