Expanding window fountain codes for unequal error protection

Authors:
Dino Sejdinovic;Dejan Vukobratovic;Angela Doufexi;Vojin Šenk;Robert J. Piechocki
Affiliations:
Centre for Communications Research, Department of Electrical and Electronic Engineering, University of Bristol, Bristol, UK;Department of Communications and Signal Processing, University of Novi Sad, Novi Sad, Serbia;Centre for Communications Research, Department of Electrical and Electronic Engineering, University of Bristol, Bristol, UK;Department of Communications and Signal Processing, University of Novi Sad, Novi Sad, Serbia;Centre for Communications Research, Department of Electrical and Electronic Engineering, University of Bristol, Bristol, UK
Venue:
IEEE Transactions on Communications
Year:
2009

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Abstract

A novel approach to provide unequal error protection (UEP) using rateless codes over erasure channels, named Expanding Window Fountain (EWF) codes, is developed and discussed. EWF codes use a windowing technique rather than a weighted (non-uniform) selection of input symbols to achieve UEP property. The windowing approach introduces additional parameters in the UEP rateless code design, making it more general and flexible than the weighted approach. Furthermore, the windowing approach provides better performance of UEP scheme, which is confirmed both theoretically and experimentally.