Methods, systems, and apparatus for tail termination of turbo decoding

Patent metadata

Field	Value
Publication number	US-8996948-B2
Application number	US-201213608905-A
Country	US
Kind code	B2
Filing date	Sep 10, 2012
Priority date	Dec 23, 2009
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

Methods and apparatus for tail termination are provided that include a decoder that includes a processor configured to a forward state metric and a backward state metric wherein each iteration of an initial state of the backward state metric is fetched from a memory and is pre-computed without feedback from a decoding iteration. Each decoding iteration is substantially identical, and the backward state metric that is pre-computed is used for a subsequent iteration. The decoder may include a turbo decoder or a radix-4 decoder.

First claim

The invention claimed is:

1. A decoder, comprising:
at least one processor configured to:
calculate backward state initial values from an input signal, and
store the backward state initial values as a pre-computed backward state metric in a memory,
for each of a plurality of decoding iterations, the at least one processor is further configured to calculate a forward state metric and calculate a backward state metric, wherein for each decoding iteration for calculating an ini…

Assignees

• Zhu Jianbin
• Li Yuan
• Zhang Tao
• Intel Corp

Inventors

• Zhu Jianbin
• Li Yuan
• Zhang Tao

Classifications

• H03M13/29

  Electricity · mapped topic

• H03M13/2957

  Electricity · mapped topic

• H04L1/006

  Electricity · mapped topic

• H03M13/1515

  Electricity · mapped topic

• H04L1/005 Primary

  Electricity · mapped topic