数字信号处理器抗辐射设计技术研究

分析了空间辐射效应对高性能数字信号处理器（DSP）的影响,并对单粒子效应引起的DSP故障模式进行了研究,结合工程实践从器件级和系统级两个层次给出了解决数字信号处理器的抗辐射加固设计技术．器件级的加固技术从存储区、控制寄存器、Cache、乘加器等角度给出解决DSP故障的一些有用方法;系统级的抗辐射设计技术则提出一种由高性能DSP和高可靠性的反熔丝FPGA为主要组成部分的“由顶到底”的星载信号处理平台体系结构,并分析了这种结构在提高DSP对抗空间单粒子效应时的优势．文章给出的有关DSP的可靠性设计方法已经在某卫星通信载荷中成功应用,并通过了各种卫星产品要求的环境试验,该抗辐射可靠性设计方法可以为有关航天电子设备的设计提供参考．

Study on the Anti-radiation Technique for Digital Signal Processor

Radiation effects on the high performance digital signal processor are studied in the paper.After the introduction of different fault modes caused by radiation effects especially single event effects we give the anti-radiation technique from two aspects:device-based solution and system-based solution.In the former solution a series of methods are given to detect and correct the faults in digital signal processor's memory,control register,cache,multiplier and adder.With the device-based solution digital signal processor can give the state of itself,properly or radiation damaged(single event upsets or single event function interruption),to the system's monitor.In the system-based solution a structure of spaceborne digital signal processing platform is presented,which is based on high quality digital signal processor and high reliability anti-fuse field programmable gate array and has the "Top to Down" architecture.With the system-based solution a new boot and configuration cycle will implement when system errors appeared,which can clear all the improper state or upset memory.The anti-radiation techniques has the good character of single event upset and single event function interruption immunity and has been adopted in a spaceborne communication platform,which works well in all kinds of environmental experiments.