A primer on turbo code concepts

被引：72

作者：

Sklar, B

机构：

[1] Republic Aviation Corp., Hughes Aircraft, Aerospace Corporation

[2] Department of Advanced Systems, Communications Engineering Services

[3] University of California, Los Angeles, CA

[4] Polytechnic Institute, Brooklyn, NY

来源：

IEEE COMMUNICATIONS MAGAZINE | 1997年 / 35卷 / 12期

关键词：

D O I：

10.1109/35.642838

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The goal of this article is to describe the main ideas behind the new class of codes called turbo codes, whose performance in terms of bit error probability has been shown to be very close to the Shannon limit. In this article, the mathematical measures of a posteriori probability and likelihood are reviewed, and the benefits of turbo codes are explained in this context. Since the algorithms needed to implement the decoders have been well documented by others, they are only referenced here, not described in detail. A numerical example, using a simple concatenated coding scheme, provides a vehicle for illustrating how error performance can be improved when soft outputs from the decoders are used in an iterative decoding process.

引用

页码：94 / 102

页数：9