改进的距离-多普勒算法

合成孔径成像算法是合成孔径雷达技术中的关键技术之一，距离一多普勒算法是成像算法中最经典最常用的算法。通过引入检测改进了距离-多普勒算法的执行结构，利用任务处理实现了距离向处理和方位向处理的分开，保证了方位向处理的实时性，保留了原有算法数据流程的串行结构。仿真实验表明，改进算法比传统算法在时间上得到了改善。最后指出了改进算法所具有的特点。

A Modified Rang-doppler Algorithm

The synthetic aperture imaging algorithm is one of the key of the synthetic aperture radar technique, and the range-doppler algorithm is the most classical and common algorithm. A modified range-doppler algorithm is put forward by introducing the detection. The task processing is adopted, which separates the whole algorithm into two independent aspects, and reserves the serial data flow structure. The result of simulation shows that the modified algorithm is effective comparing with the traditional one. At last the characteristic of the modified range-doppler algorithm is pointed out.