公开(公告)号：EP1130789A3

公开(公告)日：2003-09-03

申请号：EP01301829.6

申请日：2001-02-28

申请人： Mitel Corporation

发明人： Jin, Gary Q.

IPC分类号： H03M13/41

CPC分类号： H03M13/3905 ,  H03M13/23 ,  H03M13/41 ,  H03M13/6583

摘要： A method and apparatus for decoding convolutional codes used in error-correcting circuitry for digital data communication. To increase the speed and precision of the decoding process, the branch and/or state metrics are normalized during the soft decision calculations, whereby the dynamic range of the decoder is better utilized. Another aspect of the invention relates to decreasing the time and memory required to calculate the log-likelihood ratio by sending some of the soft decision values directly to a calculator without first storing them in memory.

公开(公告)号：EP1130789A2

公开(公告)日：2001-09-05

申请号：EP01301829.6

申请日：2001-02-28

申请人： Mitel Corporation

发明人： Jin, Gary Q.

IPC分类号： H03M13/41

CPC分类号： H03M13/3905 ,  H03M13/23 ,  H03M13/41 ,  H03M13/6583

摘要： A method and apparatus for decoding convolutional codes used in error-correcting circuitry for digital data communication. To increase the speed and precision of the decoding process, the branch and/or state metrics are normalized during the soft decision calculations, whereby the dynamic range of the decoder is better utilized. Another aspect of the invention relates to decreasing the time and memory required to calculate the log-likelihood ratio by sending some of the soft decision values directly to a calculator without first storing them in memory.

摘要翻译： 一种用于解码用于数字数据通信的纠错电路中的卷积码的方法和装置。 为了提高解码处理的速度和精度，在软判决计算期间对分支和/或状态度量进行归一化，从而更好地利用解码器的动态范围。 本发明的另一方面涉及通过将一些软判决值直接发送到计算器而不先将其存储在存储器中来减少计算对数似然比所需的时间和存储器。