Parameter estimation method for modelling noise Doppler of airborne radar

An airborne radar and parameter estimation technology, which is applied in the field of clutter Doppler parameter estimation, can solve problems such as affecting the accuracy of parameter estimation, and achieve the effect of breaking through the Rayleigh limit and avoiding transform domain processing.
CN1601298AInactive Publication Date: 2005-03-30TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2005-03-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a modeled clutter Doppler parameter estimation method of airborne radar. The clutter model provided by said invention is Doppler distribited clutter (DDC) model. The clutter covariance matrix described by said model is analyzed and expressed by four specific parameters of Doppler centre, Doppler spectrum-width extending coefficient, clutter roughness parameter and noise roughness parameter. The clutter parameter estimation method includes the following steps: (1) airborne radar can be used for transmitting pulse signal, and collecting echo data; 2). utilizing clutter data in collected signals to form itnerference covariance matrix of sample; and 3). according to the itnerference covariance matrix of sample combinatively estimating the unknown parameter in DDC clutter model. Besides, said invention also provides the advantage and application of said estimation method.
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Description

technical field

[0001] The present invention relates to radar, and more specifically, the present invention relates to a method for estimating clutter Doppler parameters of airborne radar. Background technique

[0002] Airborne radar has excellent characteristics such as all-day, all-weather, and penetrating, and has a wide range of applications in civil and military fields such as navigation, surveying and mapping, reconnaissance, warning, and fire control. However, there are many unresolved technical problems in airborne radar signal processing, and many of them can be attributed to the clutter Doppler parameters (such as Doppler center, Doppler spectral width and Doppler Tuning frequency, etc.) estimation problem.

[0003] For example, in the moving target detection of airborne radar, the received signal usually includes target signal, clutter signal and noise signal. Since the airborne radar is usually in the downward-looking mode, the ground clutter is widely distribu...

Claims

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