Method and device for calibrating calibration value of airborne interferometer
An interferometer and calibration value technology, applied in the field of calibration, can solve the problems of unconsidered, low precision, and unconsidered confidence.
Inactive Publication Date: 2019-05-21
STRATEGIC EARLY WARNING RES INST OF THE PEOPLES LIBERATION ARMY AIR FORCE RES INST
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However, this method of configuring the calibration value of the airborne interferometer does not take into account the confidence of the configured calibration value, that is, in the process of configuring the calibration value, the influence of the inconsistency from the antenna unit to the channel and between channels on the calibration value is not considered. , it is difficult to guarantee the reliability of the calibration value of the airborne interferometer, therefore, the accuracy of direction finding based on the calibration value will also be affected, and the accuracy is not high
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[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without...
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The invention provides a method and device for acquiring a calibration value of an airborne interferometer. The calibration value comprises an internal calibration value and an external calibration value, and the method comprises the following steps: acquiring an initial internal calibration value based on a calibration signal generated by a preset calibration source; adjusting channels of the airborne interferometer based on the initial internal calibration value and the calibration signal; obtaining an internal calibration value of the airborne interferometer based on the airborne interferometer with the channels being adjusted and the calibration signal; closing the calibration source, transmitting a calibration radiation signal to the airborne interferometer by using a preset calibration radiation source, and obtaining an initial external calibration value of the airborne interferometer based on the internal calibration value; adjusting an antenna of the airborne interferometer toa communication link of each channel based on the initial external calibration value and the calibration radiation signal; and obtaining an external calibration value of the airborne interferometer based on the airborne interferometer with the communication link being adjusted and the calibration radiation signal. The reliability of the calibration value can be effectively improved, and then the direction finding accuracy is improved.
Description
technical field [0001] The present application relates to the technical field of calibration, and in particular, to a method and device for obtaining calibration values of an airborne interferometer. Background technique [0002] As an important technology of passive detection, airborne interferometer direction finding has the characteristics of high direction finding accuracy, wide operating frequency band, simple system structure and easy deployment, etc., and has been widely used. However, since the airborne interferometer uses the phase difference of each antenna unit for direction finding, its direction finding accuracy is affected by the inconsistency between the antenna unit and the channel and between channels. Therefore, in engineering applications, it is necessary to pre-configure Onboard interferometer calibration values to remove the effects of phase inconsistencies from antenna element to channel and channel to channel, and direction finding based on calibra...
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IPC IPC(8): G01S3/48G01S3/02
Inventor 方棉佳王建涛熊子源王国宏王建鹏陈艳青
Owner STRATEGIC EARLY WARNING RES INST OF THE PEOPLES LIBERATION ARMY AIR FORCE RES INST
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