基于多核DSP的高分辨距离像运动补偿算法实现

弹载毫米波步进频率雷达能 够得到目标具有较高距离分辨率的一维距离像，但当运动目标相对雷达具有径向速度时，会 使 回波信号产生严重的偏移与畸变，故必须进行运动速度补偿。本文首先分析了步进频率雷达 高分辨距离像成像原理与目标运动速度对成像的影响，然后论述了一种基于正负调频法与最 大脉组求和法的二次速度估计算法，并在TMS320C6678多核DSP平台上提出了该算法的一种并 行实现方案，同时描述了该实现方案的任务分配、调度与核间通信过程。最后在多核DSP平 台上对1 000帧回波信号做算法测试。测试结果表明，基于多核DSP的运动补偿算法具有较高 的精度和良好的实时性。

Implementation of Motion Compensation Algorithm of HRRP Based on TMS320C6678

Missile-borne step frequency MMW radar can get high resolution range profile, b u t when moving target has radial velocity relative to the radar, it makes the echo signal produce serious deviation and distortion, so it is necessary to mak e compensation in the motion velocity. Firstly, this paper analyzes the image fo rmin g principle of missile-borne step frequency MMW radar and the effect of the tar get v elocity on image forming, then discusses the quadratic velocity estimation algo rithm, which is on the basis of the positive and negative frequency modulation m ethod and the maximum pulse group summation method. It provides a parallel imple mentation scheme of the algorithm on the TMS320C6678 multi core DSP platform, a n d describes the implementation scheme of task allocation, scheduling and inter c ore communication process at the same time. Finally it carries out an algorithm test to 1 000 frames echo signal on multi-core DSP platform, whose result shows t hat the motion compensation algorithm has high accuracy and good real-time perf ormance based on multicore DSP.