公开(公告)号：GB2365291A

公开(公告)日：2002-02-13

申请号：GB0103078

申请日：2001-02-07

Applicant: MOTOROLA INC

Inventor： CLASSON BRIAN KEITH ,  SCHAFFNER TERRY M ,  DESAI VIPUL A ,  BAKER JAMES C ,  FRIEND DANIEL M

IPC: G06F11/10 ,  H03M13/23 ,  H03M13/41 ,  H03M13/45 ,  H03M13/29

Abstract: Decoding signals represented by a trellis of block length N divided into windows of length L includes a step of decoding a backward recursion from a point P that is after the end of a window back to the end of the window. P is chosen at a sufficient distance from the end of the window such that backward recursion determines a known state metric at the 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 known backward recursion state metrics which are stored. A next step includes decoding using forward recursion starting from a known state at the beginning of the window and moving forward. A next step includes calculating a soft output at each stage of the forward recursion using the stored backward recursion state metrics, and branch metrics at each stage, and outputting the soft output for that stage.

公开(公告)号：GB2365291B

公开(公告)日：2002-11-20

申请号：GB0103078

申请日：2001-02-07

Applicant: MOTOROLA INC

Inventor： CLASSON BRIAN KEITH ,  SCHAFFNER TERRY M ,  DESAI VIPUL A ,  BAKER JAMES C ,  FRIEND DANIEL M

IPC: G06F11/10 ,  H03M13/23 ,  H03M13/41 ,  H03M13/45 ,  H03M13/29