公开(公告)号：US09450618B2

公开(公告)日：2016-09-20

申请号：US14192674

申请日：2014-02-27

Applicant: STMICROELECTRONICS INC.

Inventor： Sivagnanam Parthasarathy ,  Lun Bin Huang ,  Alessandro Risso

IPC: H03M13/00 ,  H03M13/41 ,  G06F11/10 ,  G11B20/18 ,  H03M13/39

CPC classification number: H03M13/4146 ,  G06F11/1076 ,  G11B20/18 ,  H03M13/3905 ,  H03M13/3927 ,  H03M13/4184 ,  H03M13/42 ,  H03M13/6343 ,  H03M13/6502 ,  H04L1/0054 ,  H04L1/0055

Abstract: A modified soft output Viterbi algorithm (SOVA) detector receives a sequence of soft information values and determines a best path and an alternate path for each soft information value and further determines, when the best and alternate paths lead to the same value for a given soft information value, whether there is a third path departing from the alternate path that leads to an opposite decision with respect to the best path for a given soft information value. The SOVA detector then considers this third path when updating the reliability of the best path. The modified SOVA detector achieves max-log-map equivalence effectively through the Fossorier approach and includes modified reliability metric units for the first N stages of the SOVA detector, where N is the memory depth of a given path, and includes conventional reliability metric units for the remaining stages of the detector.

Abstract translation: 修改的软输出维特比算法（SOVA）检测器接收软信息值序列，并为每个软信息值确定最佳路径和备用路径，并且进一步确定当给定软件的最佳和替代路径导致相同值时 信息值，是否存在离开替代路径的第三路径，其导致相对于给定软信息值的最佳路径的相反决定。 然后，SOVA检测器在更新最佳路径的可靠性时考虑第三条路径。 改进的SOVA检测器通过Fossorier方法有效地实现了最大对数映射的等效性，并且包括SOVA检测器的前N个级的修正的可靠性度量单位，其中N是给定路径的存储器深度，并且包括用于 检测器的剩余阶段。