Design and implementation of IF signal highspeed acquisition and real-time storage system for wideband radar

摘要

To resolve the problem of sampling speed and real-time continuous mass storage in large instantaneous bandwidth radar echoes intermediate frequency direct sampling, a wideband radar intermediate frequency signal high-speed acquisition and real-time storage system is developed in this paper. Firstly, according to bandpass signal alias-free sampling theorem, the sampling frequency is determined. And then the buffer and high-speed real-time continuous mass storage design scheme is proposed. Based on chassis server platform, this system uses QDRII SRAM as the buffer storage, and adopts PCI Express to be the data transmission channel. It is verified in a phased array radar experimental system that this system makes a good performance and gives a feasible schema for wideband radar data acquisition.