| 摘要: |
| 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EP2S15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。 |
| 关键词: 弹载数据链 RS译码器 修正的欧几里德算法 实时处理 |
| DOI： |
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| 基金项目:国家高技术研究发展计划(863计划)项目（2013AA7072012D)；河南省高等学校重点科研项目(15A510011）；河南省科技厅基础与前沿项目(142300410446) |
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| Design of real-time RS decoder for missile-borne data link system |
| WANG Peng,TU Youchao,GONG Ke |
| () |
| Abstract: |
| 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 efficient 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 architecture 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 design has been implemented successfully on EP2S15 FPGA chip of Altera Corp. Compared with existing RS decoders,the proposed architecture can reduce hardware resources greatly while still meeting required performance. So the presented strategy is much suitable for high-reliability missile data link system design. |
| Key words: missile-borne data link RS decoder modified Euclidean algorithm real-time processing |
《电讯技术》编辑部 