A Soft-Input Soft-Output APP Module for Iterative Decoding of Concatenated Codes

被引：371

作者：

Benedetto, S. ^{[1
]}

Divsalar, D. ^{[2
]}

Montorsi, G. ^{[1
]}

Pollara, F. ^{[2
]}

机构：

[1] Politecn Torino, I-10122 Turin, Italy

[2] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

来源：

IEEE COMMUNICATIONS LETTERS | 1997年 / 1卷 / 01期

基金：

美国国家航空航天局;

关键词：

D O I：

10.1109/4234.552145

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

Concatenated coding schemes consist of the combination of two or more simple constituent encoders and interleavers. The parallel concatenation known as "turbo code" has been shown to yield remarkable coding gains close to theoretical limits, yet admitting a relatively simple iterative decoding technique. The recently proposed serial concatenation of interleaved codes may offer superior performance to that of turbo codes. In both coding schemes, the core of the iterative decoding structure is a soft-input soft-output (SISO) a posteriori probability (APP) module. In this letter, we describe the SISO APP module that updates the APP's corresponding to the input and the output bits, of a code, and show how to embed it into an iterative decoder for a new hybrid concatenation of three codes, to fully exploit the benefits of the proposed SISO APP module.

引用

页码：22 / 24

页数：3