An automatic test device for anti-multipath performance of a satellite navigation receiver

Abstract

An automated testing device for anti-multipath performance of a satellite navigation receiver comprises a multipath channel simulation unit, a multipath parameter control unit and a test result processing unit, wherein the multipath channel simulation unit is used for converting satellite navigation signals into satellite navigation degraded signals subjected to multipath effects according to requirements of an anti-multipath performance test; the multipath parameter control unit is used for controlling the multipath channel simulation unit, the satellite navigation receiver and the test result processing unit according to the requirements of the anti-multipath performance test; the test result processing unit is used for processing test result data according to multipath parameters and anti-multipath test items. The automated testing device for the anti-multipath performance of the satellite navigation receiver can achieve data communication through a bus and radio-frequency cables between a satellite navigation signal simulator and the navigation receiver, thereby completing a performance index test and a multipath error envelope area test of the satellite navigation receiver in a multipath condition.

Description

technical field [0001] The invention belongs to the field of satellite navigation and relates to a device for testing the performance of a satellite navigation receiver. Background technique [0002] Satellite navigation receiver testing technology is used in the entire process of research and development, production, use and maintenance of satellite navigation receiver products. In recent years, due to the continuous development of satellite navigation receiver technology, the demand for anti-multipath performance testing has become more and more urgent. [0003] The multipath effect can be attributed to two types according to its cause: the first is specular multipath, which can be simulated as one or more pseudo-random code modulated signal delay signals; the second is scattered multipath, which is many delayed received signals The sum, often appears as an additional noise signal. Specular multipath becomes the main factor of error due to its high correlation. Satellit...

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Problems solved by technology

[0005] At present, satellite navigation receivers are tested with satellite navigation signal simulators, but current satellite navigation signal simulators can only generate multipath signals with known multipath numbers and fading coefficients, and cannot generate multipath signals of other models , and the testers need to participate in the whole process of the test, which seriously affects the anti-multipath performance test effect of the satellite navigation receiver

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