Event Details
On Lowering the Error-Floor of Low-Complexity Turbo-Codes
Presenter: Zeljko Blazek
Supervisor:
Date: Fri, September 26, 2003
Time: 13:30:00 - 14:30:00
Place: EOW 430
ABSTRACT
Abstract:
Turbo-codes are a popular error correction method for applications requiring bit error rates from 10e-3 to 10e-6, such as wireless multimedia applications. In order to reduce the complexity of the turbo-decoder, it is advantageous to use the simplest possible constituent codes, such as 4-state recursive systematic convolutional (RSC) codes. However, for such codes, the error floor can be high, thus making them unable to achieve the target bit error range.
In this talk, two methods of lowering the error floor are presented. These methods are interleaver selection, and puncturing selective data bits. Through the use of appropriate code design criteria, various types of interleavers, and various puncturing parameters are evaluated. It was found that by careful selection of interleavers and puncturing parameters, a substantial reduction in the error floor can be achieved.
For further information please contact:
Zeljko Blazek (zblazek@ece.uvic.ca)