箭载“黑匣子”中的RS(255,239)编译码器  

RS(255,239) Codecs In Rocket-borne “Black-Box”

作　　者：丁利琼[1,2] 谭秋林[1,2] 张献生[1,2] 康昊[1,2] 

机构地区：[1]中北大学电子测试技术重点实验室,太原030051 [2]中北大学仪器科学与动态测试教育部重点实验室,太原030051

出　　处：《计算机测量与控制》2013年第12期3405-3407,3410,共4页Computer Measurement &Control

基　　金：国家青年基金资助(51205373)

摘　　要：箭载"黑匣子"中包含火箭飞行过程中的一些外界环境参数和动态参数等一系列重要参数,可分析火箭飞行真实状态,然而当这些信号在通过信道传输时,不可避免地会受到干扰而出现信号失真,由此产生严重的错误,鉴于此,采用Xilinx公司的Virtex-5系列FPGA实现了一种RS(255,239)编译码器;首先简要介绍RS编译码算法,选取改进的BM算法,并提出了一种流水线结构的译码器实现方案。在译码器复杂度和译码延时上作了折衷,降低了复杂度并提高了纠错能力;仿真结果表明,该编译码器具有很强的纠正突发和随机错误能力,可实现对在进行箭载黑匣子读写时产生的坏块数据纠检错,以达到提高存储系统的可靠性;与已有的该项设计相比,具有速度快和占用硬件资源少的特点。A series of important parameters such as the external environment and dynamic parameters in the flight of Rocket-borne ＂Black-box＂can analyze the flight of rocket,however,it is inevitable that these important parameters would be distort,evengive rise to a serious error due to interference when transmitted through the channel.In view of these,we designed a RS（255,239）Codecs and implemented on FPGAs of Xilinx＇s Virtex-5,introduced the RS encoding and decoding algorithm briefly in first in which we select the improved BM algorithm,in addition,apipeline structure in the design of decoder be proposed.What＇s more,we make some tradeoff between decoder complexity and decoding delay to reduce complexity and improve the error correction capability perfectly.The simulation results show that the codec has a perfect performance of corrective burst and random errors,and couldcorrect the bad blocks data that produced when we read and write Black-box to improve the reliability of storage system,and it characterize the high speed and less hardware resourcescompared with the existing design of the speed and less hardware resources.

关 键 词：RS(255 239) BERLEKAMP-MASSEY算法 编译码器 黑匣子 

分 类 号：V219[航空宇航科学与技术—航空宇航推进理论与工程]