一种高效的微型SAR实时成像系统架构设计

Efficient hardware architecture for miniature SAR on-board imaging processing system

旨在解决微型合成孔径雷达(miniature synthetic aperture radar,MiniSAR)实时成像处理系统级的关键问题。首先给出了MiniSAR的特点及因其产生的设计问题,分析了高分辨率指标下的系统需求,比较了传统方案的优缺点。为使系统性能最优化,设计了一个高效的体系架构,并给出了全面提升系统性能的一系列方法,减少处理器之间的数据交换、提高交换效率、提高交换速度,同时利用软硬结合的灵活方法解决模块化、可升级及可重配置的问题。最后通过与传统方法的比较验证其有效性,并给出成像结果和结论。

Aiming to find solutions to system-level issues for miniature synthetic aperture radar （MiniSAR）on-board hnaging processing, firstly this paper discusses the MiniSAR system＇ s design issues subSect to its characteristics of limited mass, volume allocation and upgradeability, and analyzes the system requirements determined by the high resolution parameter. The advantages and disadvantages of various traditional architectures are compared. A modular upgradeable reconfigurable architecture has Been defined to reduce risks. Various efforts are paid to maximize the system performance, including reduction of data exchange between proces sots, improvement of data exchange efficiency and speed, and improvement of processing capability. Meanwhile a method combining hardware and software design using SOPC and NIOS 11 tools is proposed to accelerate de veloping progress. Finally, comparison with traditional method is made to verify the validity of the proposed schedule, and the imaging result and conclusion are given.