A Method of Correcting High Frequency Radar Antenna Channel Using AIS Information

A radar antenna and channel correction technology, which is applied to radio wave measurement systems, instruments, etc., can solve the problems of large amount of calculation, lack of stability, and large amount of calculation, and achieve low cost, stable and reliable correction parameters, and simple algorithm Effect
CN103837867BInactive Publication Date: 2016-03-30WUHAN UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN UNIV
Publication Date
2016-03-30
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention provides a method for correcting a high frequency radar antenna channel by the utilization of AIS information. Correction of a channel of a monopole cross loop antenna is conduced by the utilization of the received AIS information and received echoes of a large number of boats in a sea area covered by a radar and through analysis of the signal relation responded by the AIS information and the echoes of the boats in different channels. In the method, no auxiliary signal source set manually is needed, only simple AIS receiving equipment is needed, and the channel collection method is passive, convenient and easy to achieve and can be expanded to other antenna modes. The method has the advantages that the cost is low, and a large amount of complicated equipment during active correction is not needed; a large number of widely-distributed boat AIS signals are used, and therefore the obtained channel correction value is good in accuracy and stable; the calculated amount is small, the requirements for the shape and the structure of the antenna do not exist, and the application range is wide.
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Description

technical field

[0001] The invention relates to a method for correcting high-frequency radar antenna channels by using AIS information. Background technique

[0002] High-frequency ground wave radar works in the high-frequency band of 3-30MHz, which can realize over-the-horizon detection of a large range of oceans. It has been widely used to detect sea state parameters, such as current velocity, current direction, and wave height. Since the wavelength of high-frequency signals is comparable to the scale of maneuvering targets (such as aircraft, ships, etc.), a larger scattering cross-section can be obtained, so it also has great potential in detecting hard targets.

[0003] High-frequency radars use arrayed or compact antennas to estimate target azimuths through spatial beamforming or direction scanning techniques. The traditional array antenna has the characteristics of high precision and convenient signal processing, but also has the disadvantages of high cost and inconve...

Claims

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