基于FPGA的DDR2缓存控制器在无线链路图像跟踪系统中的应用

Based on FPGA DDR2 Cache Controller in the Application of the Wireless Link Image Tracking System

图像跟踪系统是机载光电吊舱的重要组成部分,其对目标捕捉的成功率直接决定了机载光电吊舱的性能。而作用于机载光电吊舱与地面站之间的无线链路系统,有着不可消除的的延时特性,这极大地降低了目标捕捉成功率。本文设计了一种基于FPGA的DDR2缓存控制器,通过缓存控制器可以轻松实现高清视频图像的快速存储和调用,从而实现图像跟踪算法对无线链路延时的补偿。该缓存控制器成功应用于某型机载光电吊舱图像跟踪系统,有效消除了无线链路延时的影响,提高了图像跟踪系统对目标捕捉的成功率。

Image tracking system is an important part of the airborne electro-optical pod,its success rate of target capture directly determine the performance of airborne electro-optical pod.Arid the wireless link between airborne electrooptical pod and ground station system can't eliminate the delay characteristics,which greatly reduces the success rate of target capture.In this paper,we design a DDR2 cache controller based on FPGA,by caching controller can easily implement hd video image storage and call quickly,so as to realize wireless link delay compensation of image tracking algorithm.The cache controller is successfully applied in a certain type of airborne electro-optical pod image tracking system,effectively eliminate the influence of the wireless link delay and improve the success rate of target capture in the image tracking system.