Multi-channel synchronous acquisition phase calibration system and method

Abstract

The invention discloses a multi-channel synchronous acquisition phase calibration system and method, and the system comprises a multi-channel radio frequency module which is used for receiving a plurality of paths of radio frequency signals, obtaining intermediate frequency signals according to the plurality of paths of radio frequency signals, and outputting a plurality of paths of clock network signals; a multi-channel analog-to-digital acquisition module which is used for converting the corresponding intermediate frequency signals into multi-channel digital output signals according to the multi-channel clock network signals; a phase calibration control module which is used for obtaining corresponding target phase information according to preset frequency point information in the multiple paths of digital output signals; a phase calibration control module which is used for selecting reference channels, comparing the target phase information corresponding to the reference channel with the target phase information corresponding to the rest channels, and outputting a control parameter to a programmable clock delay module according to a comparison result, so that the programmable clock delay module calibrates the multi-path clock network signal according to the control parameter, thereby realizing calibration of the multi-path clock network signal.

Description

technical field [0001] The invention relates to the technical field of multi-channel high-speed data acquisition, in particular to a multi-channel synchronous acquisition phase calibration system and method. Background technique [0002] High-speed signal acquisition equipment is based on radio frequency, analog, digital, high-speed bus, and signal processing algorithms. It can capture various high-frequency and high-speed electromagnetic signals in the electromagnetic environment through the secondary frequency conversion method or direct radio frequency sampling. , can be widely used in spectrum monitoring, radar and communication fields. Especially in the field of direction finding and positioning, it is necessary to collect multiple high-speed signals, large bandwidth, and high sampling rate signals at the same time, and the synchronous acquisition accuracy is required to reach the order of picoseconds, which provides high requirements for phase consistency between multi...

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to propose a multi-channel synchronous acquisition phase calibration system and method, aiming at solving the technical problem of phase inconsistency during multi-channel synchronous signal acquisition

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