Development of pulse radar intermediate frequency or video echo signal acquisition system

A portable signal acquisition and recording system is developed, which can be used to acquire pulse radar intermediate frequency or video echo signal. The system uses a laptop as the acquisition control equipment. A radar interface card and a general radar data acquisition card are designed to acquire radar intermediate frequency or video echo signal, which are put into a small shielding box and are very portable. The acquisition card uses USB2.0 as the interface with a microcomputer, uses FPGA as kernel chip to control the data acquisition and data transmission. The system uses FIFO in FPGA, SRAM on acquisition card, multi-thread and buffer storage in microcomputer to provide continuous acquisition, and uses time query and displaying control technique to implement real-time A-scope display on microcomputer monitor. User can set azimuth and distance wave gate of any area, and store acquired data at real time. The data acquisition experiment results show that the system can satisfy the data acquisition tasks of many kinds of radar.