公开(公告)号：US08621307B2

公开(公告)日：2013-12-31

申请号：US12108155

申请日：2008-04-23

申请人： Yi Cai ,  Jerzy R. Domagala ,  Alexei N. Pilipetskii

发明人： Yi Cai ,  Jerzy R. Domagala ,  Alexei N. Pilipetskii

IPC分类号： G06F11/30

CPC分类号： H04L1/0045

摘要： A soft decision threshold control system and method may be used with a forward error correction (FEC) scheme to adjust or tune one or more soft decision thresholds in response to one or more bit value averages for the threshold(s) and in response to a bit error rate (BER). The bit value average for a soft decision threshold generally refers to an average number of binary values (e.g., logic ones and/or zeros) occurring in a bit stream detected using the soft decision threshold. For different BER levels in a particular system, for example, one or more of the soft decision thresholds may have a predetermined bit value average, which has been determined to provide a certain level of performance (e.g., an optimum performance). Thus, one or more of the soft decision thresholds may be adjusted such that the bit value averages for the soft decision thresholds are adjusted as a function of the BER. The settings of the soft decision thresholds may also be adjusted in response to changes in a signal amplitude of the input signal being detected.

摘要翻译： 软判决阈值控制系统和方法可以与前向纠错（FEC）方案一起使用，以响应于阈值的一个或多个比特值平均值并响应于一个或多个阈值平均来调整或调整一个或多个软判决阈值 误码率（BER）。 软判决阈值的比特值平均值通常是指使用软判决阈值检测的比特流中出现的二进制值（例如，逻辑1和/或零）的平均数。 对于特定系统中的不同BER级别，例如，一个或多个软判决阈值可以具有预定的位值平均值，其被确定为提供一定水平的性能（例如，最佳性能）。 因此，可以调整一个或多个软判决阈值，使得对于软判决阈值的比特值平均作为BER的函数进行调整。 还可以响应于被检测的输入信号的信号幅度的变化来调整软判决阈值的设置。