武汉大学学报(理学版)
武漢大學學報(理學版)
무한대학학보(이학판)
JOURNAL OF WUHAN UNIVERSITY(Natural Science Edition)
2001年
3期
359-363
,共5页
江森%苏祥芳%肖东亮%孙洪
江森%囌祥芳%肖東亮%孫洪
강삼%소상방%초동량%손홍
并行级联卷积码%Turbo码%编码器%复杂可编程逻辑器件
併行級聯捲積碼%Turbo碼%編碼器%複雜可編程邏輯器件
병행급련권적마%Turbo마%편마기%복잡가편정라집기건
详细探讨了卷积Turbo码编码器实现过程中的关键问题,结合CCSDS及IMT-2000国际通信标准给出了具体解决方案.使用Maxplus2开发工具在CPLD上实现了整个卷积Turbo码编码器并给出了系统分析,实验结果表明了该编码器的正确性和合理性.
詳細探討瞭捲積Turbo碼編碼器實現過程中的關鍵問題,結閤CCSDS及IMT-2000國際通信標準給齣瞭具體解決方案.使用Maxplus2開髮工具在CPLD上實現瞭整箇捲積Turbo碼編碼器併給齣瞭繫統分析,實驗結果錶明瞭該編碼器的正確性和閤理性.
상세탐토료권적Turbo마편마기실현과정중적관건문제,결합CCSDS급IMT-2000국제통신표준급출료구체해결방안.사용Maxplus2개발공구재CPLD상실현료정개권적Turbo마편마기병급출료계통분석,실험결과표명료해편마기적정학성화합이성.
At first, the fundamental of Turbo codes is introduced.Because of their excellent performance and practical application, parallel cancatenated convolutionary codes, a branch of Turbo codes, are focused on. Then some key problems on realizing the hardware encoder of parallel concatenated convolutionary codes are analysed in details, which includes the problem of flush bits, the problem of stream processing, the problem of realizing interleaver and the problem of puncturing. To the four problems, we bring forward the concrete resolutions ,which can be realized on hardware easily, especially on CPLD.Moreover parts of the resolutions are compliant with the relative international standards and recommendations.Refering to Telemetry Channel Coding Recommendation for Space System of CCSDS, a simplized interleaver design is developed and for adapting to all kinds of puncture patterns of IMT-2000 and CCSDS, a flexible puncture method is adopted. Based on these methods, an integrated encoder system is presented and analysed, some parameters of the system are formulated.According to the system, two kinds of encoders are designed and simulated on FLEX10K, a series of CPLD, with Maxplus2, a powerful CPLD development software.Compared with the results of standard C program of encoding parallel concatenated convolutionary codes, the results of simulation prove the designs are correct.Seen from the experimental data listed at the end, the resolutions are efficient on reducing consumation of hardware resource.