基于DSP的PRUSS实现严格实时中断  

DSP-based PRUSS Implements Strict Real-time Interrupts

作　　者：陈泽宗[1,2] 佘高淇 王子寒 翟栋晨 CHEN Ze-zong;SHE Gao-qi;WANG Zi-han;ZHAI Dong-chen(School of Electronic Information,Wuhan University,Wuhan 430072,China;Collaborative Innovation Center for Geospatial Technology,Wuhan University,Wuhan 430079,China)

机构地区：[1]武汉大学电子信息学院,武汉430072 [2]武汉大学地球空间信息技术协同创新中心,武汉430079

出　　处：《科学技术与工程》2019年第26期255-259,共5页Science Technology and Engineering

基　　金：国家自然科学基金(61871296);国家重点研发计划(2016YFC1400504)资助

摘　　要：在S波段测波雷达系统中,系统的相干性直接影响了系统对海浪参数的测量。对于采用数字信号处理器(digital signal processor,DSP)为核心处理器的微波雷达系统,由于DSP的SYSBIOS系统对硬件中断的响应和任务调度存在时间不定性,破坏了系统的相干性,导致回波信噪比下降。针对这一问题,提出利用DSP的可编程实时单元子系统(programmable real-time unit subsystem,PRUSS)对中断采集信号进行实时查询与响应,可以实现中断的无延迟响应,严格保证了雷达对信号回波采集的相干性。In the S-band Doppler wave radar system,the coherence of the system directly affects the measurement of the wave dynamic parameters. For the microwave radar system using digital signal processor( DSP) as its core processor,because of the time uncertainty of the task scheduling performed by the operating system running on DSP,the coherence of the system is compromised,which leads to the deterioration of the echoes’ signal noise ratio.To solve this problem,a programmable real-time unit subsystem( PRUSS) in DSP is proposed to perform real-time responses to interrupt signals,which guarantees the coherence of the acquired echoes.

关 键 词：S波段测波雷达 DSP 相干性 SYSBIOS系统 可编程实时单元子系统 

分 类 号：TN952[电子电信—信号与信息处理]