A Calibration Method for Calibrating Time Delay of Transponder Group

Abstract

The invention discloses a method for calibrating group delays of a calibration repeater. The method comprises the following steps: the initial delay of a calibration system: generating two paths of pulse signals with the same frequency and same phase by using an arbitrary waveform generator, wherein one path of pulse signal is taken as a modulation signal to implement pulse modulation on a microwave signal generator to generate a pulse modulation signal, the pulse modulation signal is subjected to wave detection through a microwave detector to generate a video pulse signal to be output, and the video pulse signal is input to a digital oscilloscope; and the other path of pulse signal is also input to the digital oscilloscope as a trigger signal; measuring the delay time of a delayed pulse signal of the video pulse signal by using the digital oscilloscope, and determining the delay time as the initial delay time FORMULA of the calibration system; step 2, the system delay of calibration after being processed by the repeater; and step 3, subtracting the initial delay of the calibration system from the system delay of calibration after being processed by the repeater to obtain the own delay time introduced by the repeater. By adopting the method disclosed by the invention, the delay time of the repeater at different carrier frequencies can be calibrated within the working frequency bandwidth of a signal repeater.

Description

technical field [0001] The invention belongs to the field of radio electronics of national defense and military industry, and in particular relates to a calibration method for calibrating the time delay of a forwarding cluster. Background technique [0002] With the development of communication technology and engineering applications, the transmission distance of radio signals is getting farther and farther. The sending end and the receiving end cannot be realized through direct interconnection, and the long-distance signal transmission must be realized through signal forwarding, that is, using a signal transponder Realize the forwarding of radio signals. The application fields of signal transponders are between ground stations and ground stations, between satellites and satellites, between ground stations and satellites, etc. However, when the signal transponder realizes radio signal forwarding, it will cause signal delay. This delay is not constant, but produces an irregu...

AI Technical Summary

Problems solved by technology

However, when the signal transponder realizes radio signal forwarding, it will cause signal delay. This delay is not constant, but produces an irregular delay effect with the change of frequency. Therefore, the signal transponder The delay can be considered as a group delay, which has different delay responses for different frequencies

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