摘要
新一代高分辨率、远作用距离机载合成孔径雷达(SA)成像侦察系统中,作为实时成像处理器核心运算部件的高速DSP模板的研制是最为关键的一环,其他关键技术的方案和实现在很大程度上由它来决定。在SAR成像中所使用的时域一频域快速相干算法以FFT为时频变换工具,SHARP公司的DSP专用芯片LH9124及其配套芯片LH9320可以完成相应的高速FFT运算。本文介绍了采用LH9124/LH9320实现DSP运算的几种方案及F9124通用FFT模板的研制,主要用于完成SAR实时成像处理器方位多视处理过程的运算,通过合理配置可适用于其它需要高速DSP运算的场合.本文还概述了如何将LH9124/LH9320与TMS320系列DSP器件配合使用完成SAR实时臧像方位处理的方案。
High speed digital signal processing (DSP) in the real-time image processor (RTIP) is key for the high resolution, long-distance synthetic aperture redar (SAR) system. Other techniques used in SAR RTIP depend on the DSP to a great extent. FFT is used as the transform method of time domain-frequency domain quickly correlated algorithm. LH9124 and LH9320 introduced here are the special chips that can be used for FFT. This paper introduces some design schemes and the self-designed F9124 general circuit bond using LH9124. THis board is mainly used in the azimuth multi-look processing in the real time image processor and can be used in many other cases if disposed properly. THis paper the introduces the scheme using LH9124/Lh9320 with TMS320 to realize the azimuth processing in SAR RTIP.
出处
《信号处理》
CSCD
2000年第3期271-275,共5页
Journal of Signal Processing