Multi-channel consistency rapid calibration method and system

Abstract

The invention discloses a multi-channel consistency rapid calibration method and system. The method comprises the following steps: obtaining a self-check source signal and a multi-channel radio frequency signal; performing radio frequency channel switching on the self-checking source signal and the multi-channel radio frequency signal for multiple times to obtain two paths of signals; performing down-conversion processing on the two paths of signals; performing hilbert conversion on the two paths of signals subjected to down-conversion processing respectively, and resolving to obtain an inherent difference between the two paths of self-check source signals and a relative difference between every two radio frequency signals; subtracting the inherent difference from the relative difference between every two radio frequency signals to obtain an absolute difference between every two radio frequency signals; converting the absolute difference between every two radio frequency signals into the absolute difference between the radio frequency signals of all channels and the radio frequency signals of the channel I to obtain a channel difference table; performing conversion according to thechannel difference table to obtain a corresponding compensation table; and compensating the radio frequency signal of each channel according to the compensation table to finish calibration. Accordingto the invention, accurate compensation of multichannel amplitude, time delay and phase can be completed.

Description

technical field [0001] The invention belongs to the field of radio frequency simulation, and in particular relates to a multi-channel consistency fast calibration method and system. Background technique [0002] With the development of radio frequency simulation technology, multi-channel radio frequency simulation is becoming more and more popular. In order to meet the experimental requirements of different simulation scenarios, the requirements for the consistency of multi-channel are getting higher and higher. For example, in the hardware-in-the-loop simulation of a radar simulator, the excitation signals of the analog amplitude system, phase comparison system, and time difference system, or the excitation signal of the array feed source, require that the amplitude, delay, and phase of the radio frequency signals between channels are completely consistent. The existing RF calibration methods are mainly divided into two types. One is to use signal analysis instruments, such...

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Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a method and system for fast m

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