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    • 8. 发明专利
    • Turbo decoder
    • 涡轮解码器
    • JP2008099145A
    • 2008-04-24
    • JP2006280655
    • 2006-10-13
    • Fujitsu Ltd富士通株式会社
    • IKEDA NORITAKA
    • H03M13/29
    • H03M13/3905H03M13/2957H03M13/2984H03M13/3972H03M13/6505
    • PROBLEM TO BE SOLVED: To provide a turbo decoder capable of reducing circuit scale. SOLUTION: The turbo decoder includes: a backward probability arithmetic unit which performs backward probability arithmetic on coded data of N bits on which turbo coding has been performed; a storage unit for storing a plurality of continuous backward probability arithmetic results regarding a predetermined section in the N bits at an interval of (n) results; a forward probability arithmetic unit for performing forward probability arithmetic on coded data; and a decoding result calculation unit for calculating the decoding results of the coded data through combined probability arithmetic using the results of the forward probability arithmetic and the results of the backward probability arithmetic. The decoding result calculation unit performs the combined probability arithmetic using the results of the forward probability arithmetic, the results of the backward probability arithmetic stored in the storage unit and the results of the backward probability arithmetic re-calculated by the backward probability arithmetic unit. COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供能够降低电路规模的turbo解码器。 解决方案:turbo解码器包括:后向概率运算单元,对已经执行了turbo编码的N位的编码数据进行后向概率运算; 存储单元,用于以(n)个结果的间隔存储关于N位中的预定部分的多个连续后向概率算术结果; 用于对编码数据进行前向概率运算的前向概率算术单元; 以及解码结果计算单元,用于使用前向概率算术的结果和后向概率运算的结果,通过组合概率运算来计算编码数据的解码结果。 解码结果计算单元使用前向概率算术的结果,存储在存储单元中的后向概率算术的结果和由后向概率运算单元重新计算的后向概率运算的结果来执行组合概率运算。 版权所有(C)2008,JPO&INPIT
    • 10. 发明专利
    • Space-efficient turbo decoder
    • 空间高效的涡轮解码器
    • JP2008022569A
    • 2008-01-31
    • JP2007212248
    • 2007-08-16
    • Qualcomm Incクゥアルコム・インコーポレイテッドQualcomm Incorporated
    • KANG INYUP
    • H03M13/13H03M13/29H03M13/27H03M13/45H04L1/00H04L13/08
    • H03M13/3905H03M13/2975H03M13/2984H03M13/6502H03M13/6505H03M13/6563
    • PROBLEM TO BE SOLVED: To solve the problem that an efficient dealing method for eliminating the necessity to attach a memory bank is required.
      SOLUTION: The disclosed turbo decoder includes a first mode of operation in which the turbo decoder uses a first functional loop. The first functional loop includes a memory bank, a read interleaver, a first multiplexer (MUX), a RAM file, a log-MAP decoder, a write interleaver, and a second MUX. The disclosed turbo decoder further includes a second mode of operation in which a second functional loop is used. The second functional loop includes the memory bank, the first MUX, the RAM file, the log-MAP decoder, and the second MUX. The memory bank is a dual port extrinsic memory. The disclosed turbo decoder circuit switches between the first mode and the second mode.
      COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:为了解决用于消除附加存储体的必要性的有效的处理方法的问题。 解决方案:所公开的turbo解码器包括turbo解码器使用第一功能环路的第一操作模式。 第一功能循环包括存储体,读交织器,第一多路复用器(MUX),RAM文件,对数MAP解码器,写交织器和第二MUX。 所公开的turbo解码器还包括使用第二功能回路的第二操作模式。 第二功能循环包括存储体,第一MUX,RAM文件,log-MAP解码器和第二MUX。 存储器是双端口外部存储器。 所公开的turbo解码器电路在第一模式和第二模式之间切换。 版权所有(C)2008,JPO&INPIT