电讯技术
電訊技術
전신기술
TELECOMMUNICATIONS ENGINEERING
2015年
5期
527-532
,共6页
弹载数据链%RS译码器%修正的欧几里德算法%实时处理
彈載數據鏈%RS譯碼器%脩正的歐幾裏德算法%實時處理
탄재수거련%RS역마기%수정적구궤리덕산법%실시처리
missile-borne data link%RS decoder%modified Euclidean algorithm%real-time processing
为了提高传输可靠性,各种差错控制编码技术已经被广泛应用在弹载武器数据链系统中。RS( Reed-Solomon)码具有很强的抗错误能力,且码长可以灵活控制,十分适合在弹载数据链系统中应用。设计了三种不同码率的RS码,并在修正的欧几里德算法基础上进一步优化,实现了一种新型RS码实时译码器。为减少系统复杂度,该译码器复用4组基本运算单元以完成错误位置多项式和错误值多项式计算,同时也没有插入额外的流水线结构,译码过程所需的GF(28)域求逆运算则通过查找表结构实现。整个设计已经在Altera公司的EP2 S15器件上通过综合和验证,与同类设计相比占用资源大大减少,适合于高可靠性导弹数据链系统开发。
為瞭提高傳輸可靠性,各種差錯控製編碼技術已經被廣汎應用在彈載武器數據鏈繫統中。RS( Reed-Solomon)碼具有很彊的抗錯誤能力,且碼長可以靈活控製,十分適閤在彈載數據鏈繫統中應用。設計瞭三種不同碼率的RS碼,併在脩正的歐幾裏德算法基礎上進一步優化,實現瞭一種新型RS碼實時譯碼器。為減少繫統複雜度,該譯碼器複用4組基本運算單元以完成錯誤位置多項式和錯誤值多項式計算,同時也沒有插入額外的流水線結構,譯碼過程所需的GF(28)域求逆運算則通過查找錶結構實現。整箇設計已經在Altera公司的EP2 S15器件上通過綜閤和驗證,與同類設計相比佔用資源大大減少,適閤于高可靠性導彈數據鏈繫統開髮。
위료제고전수가고성,각충차착공제편마기술이경피엄범응용재탄재무기수거련계통중。RS( Reed-Solomon)마구유흔강적항착오능력,차마장가이령활공제,십분괄합재탄재수거련계통중응용。설계료삼충불동마솔적RS마,병재수정적구궤리덕산법기출상진일보우화,실현료일충신형RS마실시역마기。위감소계통복잡도,해역마기복용4조기본운산단원이완성착오위치다항식화착오치다항식계산,동시야몰유삽입액외적류수선결구,역마과정소수적GF(28)역구역운산칙통과사조표결구실현。정개설계이경재Altera공사적EP2 S15기건상통과종합화험증,여동류설계상비점용자원대대감소,괄합우고가고성도탄수거련계통개발。
To improve transmission reliability, Forward Error Correction ( FEC ) techniques have been widely used in many missile-borne weapon data link systems. Reed-Solomon(RS) code has been proved to be effi-cient for correcting error. Also,its code length can be controlled flexibly,showing great advantage for missile-borne data link system. Three different RS codes are designed to adapt different environment. Furthermore,the widely used Modified Euclidean Algorithm for RS decoding is improved. A novel real-time RS decoder archi-tecture is presented. To attain lower complexity,4 basic calculation cells of decoder are multiplexed internally to solve the error-locator polynomial and error value polynomial. No additional pipeline architecture is inserted. Besides,the complicated inverse operation over GF(28) is completed via Look-up Table(LUT). The whole de-sign has been implemented successfully on EP2S15 FPGA chip of Altera Corp. Compared with existing RS de-coders,the proposed architecture can reduce hardware resources greatly while still meeting required perform-ance. So the presented strategy is much suitable for high-reliability missile data link system design.