Method for inhibiting ionospheric clutter in portable high frequency groundwave radar

A high-frequency ground wave radar and ionosphere technology, applied to radio wave measurement systems, instruments, etc., can solve problems such as complexity, clutter residue, and signal loss
CN101581782BInactive Publication Date: 2012-05-23WUHAN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN UNIV
Publication Date
2012-05-23
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to the radar anti-interference technical field, in particular to a method for inhibiting ionospheric clutter in portable high frequency groundwave radar. In the invention, a plurality of sets of auxiliary crossed loops are arranged in the vertical direction of original crossed loop antennas of the portable high frequency groundwave radar, adaptive cancellation is carried outon the received signals of auxiliary crossed loop antennas, a main crossed loop and monopole antennas; the received signals of the main crossed loop and the monopole antenna are used as a basic inputsignal, the difference of the received signals between each auxiliary crossed loop antenna and the main crossed loop antenna are used as a reference signal to input three mutually independent self-adapting filters; an error signal is output from the self-adapting filters to be echoed signals of the main crossed loop and the monopole for inhibiting ionospheric clutter. The invention has the following advantages: an ideal ionospheric clutter reference signal can be obtained and the working efficiency and detection performance of radars can be greatly increased.
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Description

technical field

[0001] The invention relates to the technical field of radar anti-jamming, in particular to a method for suppressing ionospheric clutter in a portable high-frequency ground wave radar. Background technique

[0002] Due to its unique over-the-horizon and all-weather detection capabilities, high-frequency ground wave radar has been widely studied and successfully applied to the measurement of ocean surface dynamic parameters, and can detect moving targets such as ships and aircraft in real time. However, there are still great challenges in the application of medium and long-range high-frequency ground wave radar. The high-frequency ground wave radar emits vertically polarized electromagnetic waves to the sea surface along the horizontal direction, but in practice, an ideal null trap cannot be formed in the direction of the antenna zenith, so some of the energy will be emitted to the sky and reflected by the ionosphere, thereby forming an ionosphere clutter. ...

Claims

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