Channel performance test system and method for satellite navigation anti-interference baseband chip

Abstract

The invention discloses a channel performance test system and method for a satellite navigation anti-interference baseband chip. The channel performance test system comprises a navigation signal simulator and a test evaluation unit, wherein the navigation signal simulator comprises a signal simulation unit and a control unit, and the control unit is used for generating or receiving externally input simulation and control parameters and sending the simulation and control parameters to the signal simulation unit and the test evaluation unit; the signal simulation unit is used for generating a digital baseband signal of a satellite according to satellite navigation simulation and control parameters and sending the digital baseband signal to the anti-interference baseband chip through an optical fiber; and the test evaluation unit is used for receiving the positioning calculation information output by the anti-interference baseband chip, comparing the positioning calculation information with the simulation and control parameters, and judging the channel performance of the anti-interference baseband chip. The invention further discloses a test method which is used for the system. The method has advantages of improving the test efficiency and the test accuracy, reducing the test cost and the like.

Description

technical field [0001] The invention mainly relates to the technical field of satellite navigation, in particular to a channel performance testing system and method of a satellite navigation anti-jamming baseband chip. Background technique [0002] The satellite navigation anti-jamming baseband chip is the core device of the anti-jamming receiver. Its function and performance determine the performance index of the whole machine. Its working principle is to add an anti-jamming algorithm to the anti-jamming baseband chip to suppress the jamming signal, and then Complete the acquisition, tracking, and data demodulation of the designated satellite signal, and provide measurement information such as pseudo-range and carrier phase of the satellite signal. [0003] At present, the test of the satellite navigation anti-jamming baseband chip is usually carried out in a microwave anechoic chamber. The test and verification system broadcasts the multi-user radio frequency signal or the...

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Problems solved by technology

[0005] 1. The test system built by the existing scheme is complex in composition and high in cost. It is necessary to strictly standardize the link power and delay of each radio frequency signal, otherwise it will directly affect the accuracy of the test and evaluation of the anti-jamming baseband chip, which is not conducive to Rapid Construction of Test System

[0006] 2. Since the anti-jamming baseband chip cannot directly process the radio frequency navigation signal, it needs to cooperate with the array antenna for the whole machine test, so the final evaluation result of the anti-jamming baseband chip introduces the interference of the array antenna, which cannot be truly and objectively reflected Real channel performance of anti-jamming baseband chip

[0007] To sum up, the traditional technology of testing the anti-jamming baseband chip through radio frequency signals cannot strip the influence of the test system, test environment, link error, etc. Performance

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