高速数据采集处理系统设计是现代数字信号处理系统的基础,已广泛应用于雷达、通信、遥测遥感、电子对抗、图像处理等领域。随着科技与信息技术的不断发展,对数据采集的要求也越来越高,如何实时、高速地采集与处理数据是一个关键性问题,也是当前研究的热门领域。本课题基于雷达电磁环境模拟器,实现对带宽400MHz,中心频率250MHz中频信号以900MSPS采样,然后将采样数据通过FPGA中的LVDS宏功能模块接收并经过串并转换和异步接口后,存储到SSRAM,等到需要时,再将存储数据读出,经过多普勒频移调制、密集多假目标干扰产生等算法后,将处理后的数据送到高速DA还原为模拟信号输出。关键词:高速数据采集,数字射频存储,希尔伯特变换,多普勒,密集多假目标干扰,FPGA8957
Title Design and Realization of High-speed Data Acquisition
and Processing System based on FPGA
Abstract
The design of high-speed data acquisition and processing system is the
foundation of modern digital signal processing systems, the high-speed
data acquisition and storage system has been widely used in radar,
communications, telemetry, remote sensing, electronic countermeasures,
image processing field. With the continuous development of technology and
information technology, the requirements of data acquisition getting
higher and higher, how to acquisition and processing of data real-time and
high-speed is a critical issue,and also a hot area in current.
This subject is based on the radar electromagnetic environment
simulator, The IF signal of bandwidth of 400MHz and center frequency of
250MHz is sampling in 900MSPS, then the sampled data is received through
the FPGA LVDS MegaWizard Plug-In Manager and series-parallel conversion
and asynchronous interfaces, storage to SSRAM ,wait until you need and then
the data stored can be read out through the Doppler frequency shift
modulation intensive target interference algorithm, then the data is
revert to the analog signal by the high-speed DA.
Keywords: high-speed data acquisition,DRFM,Hilbert,Doppler,dense
multi-false target jamming,FPGA 目 录