公开(公告)号：US20020046378A1

公开(公告)日：2002-04-18

申请号：US09941388

申请日：2001-08-28

申请人： Oki Techno Centre (Singapore) Pte Ltd

发明人： Hiroki Sugimoto ,  Tingwu Wang ,  Kai Ren Tan ,  Ping Xie

IPC分类号： H04L001/00 ,  G06F011/00 ,  G06F011/30 ,  H03M013/00 ,  G08C025/00

CPC分类号： H03M13/6583 ,  H03M13/2903 ,  H03M13/2957 ,  H03M13/2993 ,  H03M13/3922 ,  H03M13/3927 ,  H03M13/3961 ,  H03M13/6362 ,  H03M13/658 ,  H04L1/005 ,  H04L1/0052 ,  H04L1/0055 ,  H04L1/0066 ,  H04L1/0068 ,  H04L1/0071

摘要： Adders each add up an addition value sent from a metric calculator and a state metric read from a memory. A maximum value selector generates a first likelihood when a data bit is 1, based on the addition values added up by the adders. A maximum value selector generates a second likelihood when a data bit is 0, based on the addition values added up by the adders. A subtracter subtracts the second likelihood from the first likelihood to generate a likelihood ratio, and a subtracter subtracts data from the likelihood ratio and generates extrinsic information. A re-normalizer multiplies the extrinsic information by a predetermined value to re-normalize it and temporarily stores it in a memory. The extrinsic information stored in the memory is used as the prior probability information for the next iterative decoding.

摘要翻译： 加法器每个都加上从度量计算器发送的加法值和从内存读取的状态度量。 当数据位为1时，最大值选择器根据由加法器相加的相加值产生第一似然。 基于由加法器相加的相加值，当数据位为0时，最大值选择器产生第二似然。 减法器从第一似然率中减去第二似然值以产生似然比，减法器从似然比中减去数据并产生外在信息。 重新规范化器将外在信息乘以预定值以对其进行重新规范化并将其临时存储在存储器中。 存储在存储器中的外在信息被用作下一次迭代解码的先验概率信息。