Design of Weather Radar Intermediate-Frequency Data Acquisition System
Xue Li · Microcomputer Information · 2008
For the high- speed acquisition and transfer of radar intermediate- frequency data ,two problems have to be resolved, the first is that AD converter must meet the need of large- dynamic range, the second is the large- scale buffer and high- speed transfer. Based on 60MHz intermediate - frequency signal of weather radar , by using the technology of A/D undersampling , digital- direct synthesizing sampling clock, putting SDRAM as large- scale buffer and 64 bits PCI bus as high- speed transfer ,the paper has real- ized the high- speed acquisition and transfer of intermediate - frequency data ,which then have been detailed described. And the final results of A/D performance testing and echo- intensity analysis indicate the scheme’s feasibility.