Radio-frequency signal calibration method based on virtual channels

Abstract

The invention provides a radio-frequency signal calibration method based on virtual channels, comprising a channel modeling module, a channel calibration module, an error correction module and an information management module. First, the channel modeling module is run to establish a virtual channel model for channels ready for calibration, and channel model information is synchronized to the information management module; the channel calibration module is run to calibrate all the channels; a calibration program generating guide is provided for a user according to the channel model information; a calibration program generated by the guide is run to obtain calibration data, and the calibration data is synchronized to the information management module; then, the error correction module is run; and finally, an error correction algorithm interface function is called during running of a test program to obtain a radio-frequency signal compensation value at a specified frequency of a specified channel to compensate channel calibration error in the process of testing. All the modules have clear functions, operation is simple and convenient, channel management and error correction are completely open, and the channel calibration needs of a test system in different stages are met through extension.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a radio frequency signal calibration method based on a virtual channel. Background technique [0002] In the automatic test system, the RF input and output signals have to go through a series of channels composed of connecting cables, switches and adapters, and the channel error will be the main source of the test error of the entire automatic test system. The channel calibration technology can effectively compensate the attenuation of the RF input and output signals during transmission, reduce the error caused by the system's own factors, and improve the accuracy and reliability of the test. [0003] At present, there are no relevant verification regulations and calibration specifications for channel calibration of automatic test systems in China, so the channel calibration methods used by many automatic test systems are designed for specific channels of their own systems. At p...

AI Technical Summary

Problems solved by technology

Testers cannot intervene in the accuracy of channel calibration and select the appropriate error correction algorithm according to the actual test situation

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