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A minimal redundancy extended f$a clutter suppression method

A clutter suppression, minimal redundancy technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as large performance loss

Active Publication Date: 2016-04-06
XIDIAN UNIV
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Problems solved by technology

However, in actual processing, it is found that the F$A algorithm, which can achieve quasi-optimal processing when matching clutter suppression, has a large performance loss in optimal clutter suppression

Method used

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  • A minimal redundancy extended f$a clutter suppression method
  • A minimal redundancy extended f$a clutter suppression method
  • A minimal redundancy extended f$a clutter suppression method

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with accompanying drawing:

[0045] The solution of the present invention is: first, preprocess the raw data of multiple receiving channels (including distance compression, quadratic compensation, Doppler center frequency correction, and if necessary, channel error and amplitude phase error should be corrected); Carrying aircraft speed and the positional relationship between each channel, perform pulse loss processing on the data of each receiving channel; perform time-domain sliding window processing on the data of each spatial channel, obtain the corresponding three sets of data, and transform each set of data into distance -Doppler domain; extract the data corresponding to the channel to be detected and the optimal auxiliary Doppler channel, so as to construct the joint space-time data vector corresponding to each distance unit; use the data of adjacent distance units to estimate the covariance matri...

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Abstract

The invention belongs to the technical field of airborne early warning radar ground moving target detection, and discloses a minimum redundance extended F$A clutter suppression method. The minimum redundance extended F$A clutter suppression method includes the following steps that for distance units, sliding window processing is conducted on pulse data of each receiving channel in time domains; azimuth Fourier transformation is conducted on the data on which sliding is conducted in the time domains and corresponding to each receiving channel; for each receiving channel, channels to be detected corresponding to the sliding window data and an optimal auxiliary Doppler channel are selected to construct spatio-temporal union data vectors, and then a covariance matrix is acquired and clutter suppression weights are acquired according to temporal-spatio guide vectors; eventually, clutter suppression is conducted on the distance units by utilizing the acquired clutter suppression weights.

Description

technical field [0001] The invention belongs to the technical field of airborne early warning radar ground moving target detection, in particular to an extended F$A clutter suppression method with minimum redundancy. Background technique [0002] Early warning aircraft plays a pivotal role in modern warfare, and has also shown its powerful power in previous wars. The core of this early warning aircraft system is the airborne early warning (AEW) radar. [0003] In the field of airborne early warning radar ground moving target detection, since Brennan proposed the space-time adaptive processing (STAP) framework in 1973, the application of this space-time two-dimensional adaptive processing method in airborne phased array radar has been widely recognized. However, because the dimensionality of this "optimal processor" is too high to be realized in real time, various quasi-optimal processing methods based on dimensionality reduction have become a research hotspot for scholars. ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/36
CPCG01S7/023G01S7/414
Inventor 杨志伟廖桂生董烁烁曾操黄鹏辉
Owner XIDIAN UNIV
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