Method and device for anti-clutter and interference in characteristic domain of sky-wave over-the-horizon radar

Abstract

The present invention provides a method for anti-clutter and interference in the characteristic domain of sky-wave over-the-horizon radar. Multi-channel data is obtained from the receiving channel in the middle; beams are formed with different azimuth angles; pulse compression is used to accumulate the data of each beam in the time domain; the clutter interference space completes the extraction of clutter interference space for all beam data; Extract the beam data to complete the dimension determination of the clutter and interference data, and extract the required beam data; filter and detect to achieve Doppler filtering and target detection of the extracted data. The invention adopts the characteristic domain information to carry out anti-interference processing, which can suppress clutter and multi-pattern interference to the greatest extent, and has relatively strong adaptability to interference. The invention also provides a corresponding anti-clutter and interference device in the characteristic domain of the sky-wave over-the-horizon radar.

Description

technical field [0001] The invention belongs to the technical field of radar, and more particularly, relates to a method and device for anti-clutter and interference in the characteristic domain of sky-wave over-the-horizon radar, which is suitable for large-scale sky-wave over-the-horizon radar systems, and can also be used for various ground information, guidance, Phased array radar systems such as battlefield surveillance. Background technique [0002] Skywave over-the-horizon radar as a type of homeland air defense equipment, its comprehensive cost-effective, has an irreplaceable role. As a type of large-scale phased array, it is characterized by multiple array elements and reconfiguration, and it is easier to customize the beam channel according to functional requirements, so as to achieve multi-function. [0003] However, due to the low operating frequency, narrow operating bandwidth, high transmit power and high noise floor of the traditional sky-wave over-the-horizo...

AI Technical Summary

Problems solved by technology

However, in the actual processing process, interference often exists at the same time. At this time, this single method has great defects. If a joint anti-interference method is used, the amount of calculation will be greatly increased. At the same time, many anti-interference methods have great impact on the system High requirements are put forward, which often require the system to be feedbackable, the algorithm to have a certain degree of intelligence, and the judgment to have a certain degree of fault tolerance, etc.

From the above analysis, it can be seen that in the actual application process of sky-wave over-the-horizon radar, there are many, complex and changeable interferences, and various combinations. It is difficult to have a method that can fully solve the problem.

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