摘要
对脉组间调频步进信号进行处理可以直接获得合成超带宽距离像及目标速度信息,获得的距离像具有较高的分辨率。然而目标的运动将会导致成像产生距离迁徙及波形失真,所以必须对目标的运动进行速度补偿。本文在论述了脉组间参差脉冲重复周期(SPRT)的速度补偿新方法及PD+调频步进体制联合工作模式的基础上,提出了基于TMS320C6678多核DSP的目标运动补偿算法的并行实现方法,该方法论述了目标运动补偿的任务级并行流水与核间高效通信。研究结果表明,基于多核DSP的复杂运动补偿算法具有较好的实时性及较高的目标成像精度。
High range resolution can be obtained by processing of millimeter wave stepped-frequency signal,but the motion of object can cause the phenomena of distance-migration and waveform distortion in the 1-D range profile,so it is necessary to make compensation in the motion velocity.In this paper a method of velocity estimation called staggering pulse repetition time （SPRT）in different pulse groups is mentioned and then a complex work mode of radar system based on SF and PD is discussed.Then,a method of the motion compensation algorithm of range profile using SF＋PD work model based on TMS320C6678 is introduced.The method implements task-level parallel pipeline and efficient inter-core communication.Experimental results show that the method is feasible and effective,and has a good real-time performance with high resolution of the range profile.
出处
《单片机与嵌入式系统应用》
2014年第4期9-12,共4页
Microcontrollers & Embedded Systems
基金
南京航空航天大学研究生创新基地(实验室)开放基金资助(项目编号:kfjj120116)
中央高校基本科研业务费专项资金资助
关键词
调频步进
脉冲多普勒
脉组间参差PRT法
嵌入式多核DSP
并行处理
module step-frequency
pulse Doppler
stagger pulse repetition time in different pulse groups
embedded multi-core DSP
parallel processing
