Satellite navigation terminal electromagnetic compatibility test device based on orthogonal signal input and test method

An electromagnetic compatibility and satellite navigation technology, which is applied in the direction of measuring devices, satellite radio beacon positioning systems, radio wave measurement systems, etc., to reduce the difficulty of engineering implementation, save test costs, and ensure the effect of authenticity

Inactive Publication Date: 2015-11-25
BEIHANG UNIV
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The satellite navigation terminal of the tested product includes a ...

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  • Satellite navigation terminal electromagnetic compatibility test device based on orthogonal signal input and test method
  • Satellite navigation terminal electromagnetic compatibility test device based on orthogonal signal input and test method
  • Satellite navigation terminal electromagnetic compatibility test device based on orthogonal signal input and test method

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Embodiment Construction

[0042] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0043] An electromagnetic compatibility test device and test method for satellite navigation terminals based on orthogonal signal input is a method of measuring antenna attenuation characteristics using designed mutually orthogonal reference signals and interference signals, and using the results to correct analog navigation signals. So as to make the test as close as possible to the real situation of the satellite navigation terminal electromagnetic compatibility test method.

[0044] The method uses a satellite navigation signal simulator to generate an analog navigation signal superimposed by multiple navigation signals; uses a reference signal whose strength is equal to that of a single analog navigation signal and whose frequency is half the bandwidth of a standard navigation signal to analyze the antenna direction characteristics and apply it to ...

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Abstract

The invention discloses a satellite navigation receiver electromagnetic compatibility test device based on orthogonal signal input and a test method and belongs to the electromagnetic compatibility test field. The test device comprises a host PC, various test signal sources, an orthogonal modulation and demodulation module, a posture adjustment module, an emission/reception antenna, a combiner, a power splitter and a frequency spectrum measurement device. The test method comprises steps of generating simulation navigation signals to make a receiver operate normally, generating reference signals and interference signals and adjusting intensity according requirements, measuring strength values of the incident reference signals in different directions, contrasting strength of different antenna reception signals, analyzing zero trapping property, correcting simulation navigation signals according to the zero trapping property, using the corrected signals for tests, and determining electromagnetic compatibility of the receiver. The test device and the method are advantaged in that the reference signals are utilized to test direction property of an adaptive antenna, the orthogonal modulation method is utilized to guarantee that the reception end can separate the reference signals, test authenticity and high precision are guaranteed, and engineering realization difficulty is reduced.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic compatibility testing, and relates to a satellite navigation terminal electromagnetic compatibility testing device and testing method based on orthogonal signal input. Background technique [0002] When the satellite navigation signal reaches the ground, the power is extremely small. In order for the satellite navigation terminal to work normally, the satellite navigation receiver in the satellite navigation terminal is required to have high sensitivity, but the high sensitivity will lead to the electromagnetic environment adaptation of the satellite navigation receiver. Sex is poor. Therefore, testing the electromagnetic environment adaptability of the satellite navigation terminal is one of the prerequisites for its use. [0003] At this stage, the electromagnetic compatibility test methods for satellite navigation terminals mainly include conduction method and radiation method. The con...

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Application Information

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IPC IPC(8): G01S19/23G01S19/21
CPCG01S19/21G01S19/23
Inventor 戴飞李鸿宇郑涛
Owner BEIHANG UNIV
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