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    • 11. 发明申请
    • BITWISE RELIABILITY INDICATORS FROM SURVIVOR BITS IN VITERBI DECODERS
    • VITERBI解码器中的生存位置的可比性可靠性指标
    • US20120042228A1
    • 2012-02-16
    • US12856143
    • 2010-08-13
    • Andries Pieter HekstraNur Engin
    • Andries Pieter HekstraNur Engin
    • H03M13/07G06F11/10G06F11/07
    • H04L1/0054H03M13/09H03M13/2936H03M13/373H03M13/4138H03M13/4161H04L1/0059H04L1/0065
    • Various embodiments relate to the production of erasure flags to indicate errors resulting from decoding of convolutional codes. A Viterbi decoder may use a register exchange method to produce a plurality of survivor codes. At a defined index, a majority vote may take place comparing values of bits in each of the survivor codes. This majority vote may involve obtaining both the quantity of high-order bits and the quantity of low-order bits and obtaining the difference of the two quantities. The absolute value of the difference of high-order bits to low-order bits may be compared to a defined threshold. When the absolute value difference is below the defined quantity, an erasure flag may be produced and associated with the bits of the defined index, indicating that they are eligible for erasure. In some embodiments, a Reed-Solomon decoder may use the erasure flag to target specific survivor bits or survivor bytes for error-correction through erasure.
    • 各种实施例涉及擦除标志的产生,以指示由卷积码的解码产生的错误。 维特比解码器可以使用寄存器交换方法来产生多个幸存代码。 在定义的索引中,可以进行多数投票来比较每个幸存者代码中的比特值。 这个多数投票可以涉及获得高阶位数量和低位数量,并获得两个数量的差。 可以将高阶位与低位的差的绝对值与定义的阈值进行比较。 当绝对值差低于定义的数量时,可以产生擦除标志并与定义的索引的位相关联,表示它们符合擦除条件。 在一些实施例中,Reed-Solomon解码器可以使用擦除标志来针对特定的幸存者比特或幸存者字节来进行错误校正。