支持SAR系统高分辨率实时成像的实时系统解决方案

A Real-Time System Solution Supporting Real-Time Imaging of High Resolution of SAR

随着信息技术的发展 ,用于军事、地理、自然灾害扫描探测的合成孔径雷达系统 (SAR)对其成像能力的分辨率和实时显示要求越来越高 因此 ,研究具有自主知识产权的、可以实时处理高分辨率成像的实时系统迫在眉睫 针对实时数据接收、存储、显示和处理等核心问题 ,提出了一种实时系统解决方案 该方案通过对Linux内核的实时扩展 ,实现了可达到高处理机利用率的多任务实时调度方法 ,可支持混成调度 ;在应用层实现符合实时需求的功能模块 ;为DSP板开发实时驱动 ,形成了从硬件驱动层和操作系统层 。

As the development of information technology, SAR is used in military, geography and nature disaster monitoring The requirements for the real-time display and the resolution of the imaging ability of SAR are higher and higher Therefore, the urgent problem is to do the research of real-time systems, which has its own knowledge property and can support the real-time imaging of high resolution To solve the problems of real-time data receiving, store, display and process, a scheme of real-time system is proposed Combined with a kind of real-time extending technique of Linux kernel which is in the operating system level, this scheme implement a real-time scheduling approach which can have high processor utilization and can support the hybrid scheduling Function modules are implemented in the application level They can satisfy the time constraints The real-time drivers for DSP are also designed Therefore, a whole system including levels of hardware driver, operating system, and application software is established