Method for achieving synchronization of multichannel analog-digital converter

Abstract

The invention belongs to the technical field of radar radio-frequency signal collecting technologies and discloses a method for achieving synchronization of a multichannel analog-digital converter. The method comprises the following steps that the multichannel analog-digital converter is configured to work in a multichannel testing mode; the multichannel analog-digital converter generates data differential pairs and channel associated clock differential pairs, and the data differential pair and the channel associated clock differential pair of each channel are sent to an FPGA chip; the FPGA chip obtains corresponding single-ended clock signals and corresponding single-ended data signals; a corresponding delay value is configured to each data bit of the single-ended data signal of each channel, according to the correspondingly delay value configured to each data bit of the singled-ended data signal of each channel, delaying processing is conducted on the signal of each data bit of the singled-ended data signal of each channel; deserializing is conducted on the delayed singled-ended data signal of each channel, and corresponding parallel data are obtained; according to the phase relationship between the parallel data of each channel, phase alignment of the parallel data of each channel is conducted.

Description

technical field [0001] The invention belongs to the technical field of radar radio frequency signal acquisition, in particular to a method for realizing the synchronization of multi-channel analog-to-digital converters, which is mainly used for the analog-to-digital conversion of radar radio frequency signals. Background technique [0002] Due to the advantages of radar itself (all-weather, no environmental requirements, etc.), radar imaging technology has received extensive attention and research. Radar imaging technology can be applied in complex conditions such as dark nights and rainy days, making up for many shortcomings of optical imaging. [0003] As the first step of radar imaging technology, the acquisition of radar signal plays a vital role in the whole imaging work. The quality of the collected radar echo signal directly determines the quality of the final imaging result. Higher resolution and higher quality require higher sampling accuracy, faster sampling speed...

AI Technical Summary

Problems solved by technology

[0005] For multi-channel high-speed ADCs, or using multiple single-channel high-speed ADCs at the same time, the phases between the channels may not be synchronized after the ADC configuration is completed, which will have a great impact on the imaging results

Images