Amplitude comparison direction finding method and system

A technology of amplitude ratio and direction finding, which is applied to direction finders using electromagnetic waves, electromagnetic directional device monitoring/calibration, etc. It can solve problems such as affecting the accuracy of amplitude ratios, reduce the requirements of amplitude consistency, and facilitate engineering implementation and operation. simple effect

Inactive Publication Date: 2019-03-22
NANJING CHANGFENG AEROSPACE ELECTRONICS SCI & TECH
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Problems solved by technology

[0003] When using the traditional ratio-amplitude direction-finding method to measure the angle of arrival of the signal, the accuracy of the amplitude ratio will be affected due to the real-time di

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  • Amplitude comparison direction finding method and system
  • Amplitude comparison direction finding method and system

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[0024] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0025] Such as figure 1 with figure 2 Shown, a kind of amplitude direction finding method, described method comprises the following steps:

[0026] Step 1. Control the SP2T switch to connect to the calibration signal source, and the calibration signal source generates a calibration signal within a wide bandwidth of direction finding according to the specified frequency and power;

[0027] Step 2. The signal processor calculates the real-time channel amplitude ratio (real-time channel amplitude ratio C1) according to the calibration signal;

[0028] Step 3. Control the SP2T switch to connect to the direction-finding antenna, the direction-finding antenna array collects the detection signal, and the signal processor calculates the measurement amp...

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Abstract

The invention discloses an amplitude comparison direction finding method and system. The method comprises the following steps of generating calibrating signals according to designated frequency and power; according to the calibrating signals, calculating a real-time channel amplitude ratio; collecting interception signals and calculating the measurement amplitude ratio of the interception signals;according to the real-time channel amplitude ratio and the measurement amplitude ratio of the interception signals, calculating the actual amplitude ratio of the interception signals; according to the actual amplitude ratio, searching for a preestablished amplitude comparison form to acquire an angle of arrival corresponding to the actual amplitude ratio. The amplitude comparison direction finding method greatly reduces requirements on consistency of amplitude comparison channels, and by controlling calibrating processes through software, is simple in operation.

Description

technical field [0001] The invention relates to the technical field of electronic countermeasures, in particular to a method and system for measuring amplitude and direction. Background technique: [0002] When the radio wave arrives at the direction-finding antenna array, the strength of the signal received by each antenna unit is different due to the different spatial positions, and the ratio-amplitude direction-finding determines the direction of arrival of the signal according to the relative amplitude of the signal received by the direction-finding antenna. [0003] When using the traditional ratio-amplitude direction-finding method to measure the angle of arrival of the signal, the accuracy of the amplitude ratio will be affected due to the real-time difference of the system. The accuracy of the amplitude ratio is directly related to the accuracy of the angle measurement. The accuracy of the ratio has become the key to the direction finding. [0004] For broadband mic...

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Application Information

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IPC IPC(8): G01S3/78
CPCG01S3/78G01S3/7803
Inventor 黄昌九耿波欧宝林
Owner NANJING CHANGFENG AEROSPACE ELECTRONICS SCI & TECH
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