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    • 45. 发明授权
    • Super high speed viterbi decoder using circularly connected 2-dimensional analog processing cell array
    • 超高速维特比解码器采用循环连接的二维模拟处理单元阵列
    • US06968495B2
    • 2005-11-22
    • US10175034
    • 2002-06-20
    • Hong Rak SonYoung Su Park
    • Hong Rak SonYoung Su Park
    • H03M13/41H03M13/03
    • H03M13/6505H03M13/3961H03M13/41
    • A super high speed Viterbi decoder and decoding method with a circularly connected 2-dimensional analog processing cell array. The Viterbi decoder has a 2-dimensional parallel processing structure, in which analog processing cells are located at nodes of a trellis diagram. An output column of the analog processing cells is connected to a decoding column. Thus, the output column becomes a column right before the decoding column. A reference input signal given at a decoding column is propagated to the whole network, while its magnitude is reduced by an amount of an error metric on each branch. The circuit-based decoding is done by adding trigger signals to disconnect the path corresponding to logic 0 (or 1), and by observing its effect at the output column.
    • 具有循环连接的2维模拟处理单元阵列的超高速维特比解码器和解码方法。 维特比解码器具有二维并行处理结构,其中模拟处理单元位于格子图的节点处。 模拟处理单元的输出列连接到解码列。 因此,输出列成为解码列之前的列。 在解码列处给出的参考输入信号被传播到整个网络,而其幅度减小每个分支上的误差度量的量。 基于电路的解码是通过添加触发信号来断开与逻辑0(或1)相对应的路径,并通过观察其在输出列的效应来完成的。
    • 49. 发明授权
    • Method of estimating read level for a memory device, memory controller therefor, and recording medium
    • 用于估计存储器件,其存储器控制器和记录介质的读取电平的方法
    • US08516183B2
    • 2013-08-20
    • US13114337
    • 2011-05-24
    • Hee Seok EunHong Rak SonJong Ha KimYoung June KimSeong Hyeog Choi
    • Hee Seok EunHong Rak SonJong Ha KimYoung June KimSeong Hyeog Choi
    • G06F12/00
    • G11C11/5642G06F12/0246G06F2212/7209G11C16/3404G11C16/349
    • A method of estimating a read level for a memory device includes calculating first information corresponding to at least one among information about the number of cells having a particular logic level in data to be programmed and information about the number of cells having a particular cell state and storing the first information during a program operation; reading the data based on a threshold level that has been set and calculating second information about the number of cells in at least one state defined by the threshold level with respect to the read data; calculating third information about the number of cells in the at least one state, which corresponds to the second information, using a probability based on the first information; comparing the second information with the third information; and determining whether to change the threshold level according to the comparison result.
    • 一种估计存储器件的读取电平的方法包括:计算对应于关于要编程的数据中具有特定逻辑电平的单元的数量的信息中的至少一个的信息的第一信息以及关于具有特定单元状态的单元的数量的信息,以及 在程序操作期间存储第一信息; 基于已经设置的阈值水平读取数据,并且相对于读取的数据计算关于由阈值水平定义的至少一个状态中的单元数量的第二信息; 使用基于所述第一信息的概率来计算与所述第二信息对应的所述至少一个状态下的小区的数量的第三信息; 将第二信息与第三信息进行比较; 以及根据比较结果确定是否改变阈值水平。