Detection, avoidance and/or correction of problematic puncturing patterns in parity bit streams used when implementing turbo codes

Patent metadata

Field	Value
Publication number	US-9065486-B2
Application number	US-201414300734-A
Country	US
Kind code	B2
Filing date	Jun 10, 2014
Priority date	Dec 16, 2002
Publication date	Jun 23, 2015
Grant date	Jun 23, 2015

Abstract

Detecting, avoiding and/or correcting problematic puncturing patterns in parity bit streams used when implementing punctured Turbo codes is achieved without having to avoid desirable code rates. This enables identification/avoidance of regions of relatively poor Turbo code performance. Forward error correction comprising Turbo coding and puncturing achieves a smooth functional relationship between any measure of performance and the effective coding rate resulting from combining the lower rate code generated by the Turbo encoder with puncturing of the parity bits. In one embodiment, methods to correct/avoid degradations due to Turbo coding are implemented by puncturing interactions when two or more stages of rate matching are employed.

First claim

What is claimed is:

1. An apparatus for use in wireless communications comprising:
a first interleaver configured to interleave systematic bits;
a second interleaver configured to interleave a first parity bit stream;
a third interleaver configured to interleave a second parity bit stream;
a buffer configured to buffer the interleaved systematic bits, the interleaved first parity bit stream and the interleaved second parity bit stream; and
a rate matching unit configured t…

Assignees

• Interdigital Tech Corp

Inventors

• Pietraski Philip J
• Sternberg Gregory S

Classifications

• H03M13/005

  Electricity · mapped topic

• H03M13/2771 Primary

  Electricity · mapped topic

• H03M13/2792

  Electricity · mapped topic

• H03M13/6362

  Electricity · mapped topic

• H03M13/6381

  Electricity · mapped topic