用ADSP21062高速信號處理系統(tǒng)實(shí)現(xiàn)機(jī)載SAR實(shí)時(shí)成像處理器的方位向處理
Using ADSP21062 based hgh-speed signal processing system to implement azimuth processing of real-time imager for airborne SAR
-
摘要: 機(jī)載SAR實(shí)時(shí)成像處理器可以在載機(jī)飛行的同時(shí)獲得高分辨率的SAR圖像,對于實(shí)時(shí)監(jiān)測、軍事偵察等應(yīng)用具有重要意義。實(shí)時(shí)成像處理器就是用高速數(shù)字信號處理系統(tǒng)來實(shí)時(shí)地實(shí)現(xiàn)SAR的成像算法。該文介紹SAR實(shí)時(shí)成像處理器方位向處理部分的研制,該部分采用了自行開發(fā)的、基于ADSP21062的高速信號處理系統(tǒng),8片ADSP21062被安排在4個并行處理通道中,具有960MFLOPS的峰值處理速度,優(yōu)化的軟件設(shè)計(jì)保證了硬件資源的利用效率。仿真測試和外場實(shí)驗(yàn)證明了該系統(tǒng)的設(shè)計(jì)是成功的。該文對方位向處理部分的實(shí)現(xiàn)原理、硬件結(jié)構(gòu)、軟件設(shè)計(jì)進(jìn)行了詳細(xì)介紹。
-
關(guān)鍵詞:
- 合成孔徑雷達(dá); 實(shí)時(shí)成像處理器; 數(shù)字信號處理
Abstract: Real-time Imager can provide Synthetic Aperture Radar(SAR) image in real-time mode which is significant for airborne SAR applications such as real-time monitoring and battle reconnaissance. A SAR real-time imager usually implements SAR imaging algorithms with high-speed DSP system. This paper describes a high-speed DSP system based on ADSP21062 to realize azimuth processing with range-Doppler algorithm, consisting of range migration correction and azimuth compression. 8 ADSP21062s are organized in 4 parallel processing blocks in this system achieving a processing speed of 960MFLOP. Elaborate software programming ensures a high efficient utilization of hardware. Experimental simulation and field flight indicate this system is successful. The principle architecture, hardware implementation and software design are presented in this paper in details. -
Wu C, et al., Modeling and a correlation algorithm for spaceborne SAR signals, IEEE Tran. on AES., 1982, AES-18(5), 563-574.[2]禹衛(wèi)東,合成孔徑雷達(dá)信號處理研究,[博士論文],南京,南京航空航天大學(xué),1997,第四章.[3]禹衛(wèi)東,吳淑梅,距離多普勒方法中的幾種插值算法比較,電子與信息學(xué)報(bào),2001,23(3),308-312.[4]吳淑梅,禹衛(wèi)東,ADSP2106x信號處理板的開發(fā)設(shè)計(jì),電子技術(shù)應(yīng)用,1999,25(12),53-55.[5]禹衛(wèi)東,方位壓縮處理和距離遷移校正,中科院電子所研究報(bào)告,1998,10.[6]禹衛(wèi)東,吳淑梅,ADSP2106x中DMA的應(yīng)用,電子技術(shù)應(yīng)用,2000,26(6),69-72. -
計(jì)量
- 文章訪問數(shù): 2157
- HTML全文瀏覽量: 54
- PDF下載量: 544
- 被引次數(shù): 0
下載:
