发明名称 |
Soft output decoder for convolutional codes |
摘要 |
Decoding signals represented by a trellis of block length N divided into windows of length L includes a step of decoding a forward recursion from a point P1 that is before the beginning of a window up to the beginning of the window and decoding a backward recursion from a point P2 that is after the end of a window back to the end of the window to define known states at the beginning and end of the window. A next step includes decoding the window using backward recursion from the known state at the end of the window back to the beginning of the window to define a set of backward recursion state metrics. A next step includes decoding using forward recursion starting from a known state at the beginning of the window and moving forward to the end of the window to define a set of forward recursion state metrics. A next step includes calculating a soft output at each stage of the window using the forward and backward recursion state metrics, and branch metrics at each stage, and outputting the soft output for that stage.
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申请公布号 |
US6856657(B1) |
申请公布日期 |
2005.02.15 |
申请号 |
US20000501883 |
申请日期 |
2000.02.10 |
申请人 |
MOTOROLA, INC. |
发明人 |
CLASSON BRIAN K.;SCHAFFNER TERRY M.;DESAI VIPUL A. |
分类号 |
G06F11/10;H03M13/23;H03M13/41;(IPC1-7):H04D1/00 |
主分类号 |
G06F11/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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