z-logo
open-access-imgOpen Access
Design of expanding window fountain codes with unequal power allocation over BIAWGN channels
Author(s) -
Yuan Lei,
Li Juan,
Wan Yi
Publication year - 2016
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2016.0040
Subject(s) - fountain code , computer science , low density parity check code , luby transform code , additive white gaussian noise , binary number , decoding methods , algorithm , encoding (memory) , node (physics) , raptor code , topology (electrical circuits) , theoretical computer science , computer network , mathematics , error floor , channel (broadcasting) , arithmetic , artificial intelligence , engineering , structural engineering , combinatorics
In this study, the authors propose an improved design of expanding window fountain (EWF) codes over the binary input additive white Gaussian noise channels. The encoding process is modified to get almost regular variable‐node degree distributions. Compared with the conventional EWF codes, their proposed scheme can lower the error floor. Furthermore, they combine the EWF encoding process with unequal power allocation to improve unequal error protection (UEP) performance, and construct pre‐coded EWF codes by concatenating their proposed EWF codes with high‐rate low‐density parity‐check codes. Both asymptotic analysis and simulation results show that, compared with the conventional scheme, their proposed scheme can get better UEP performance and design flexibility.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.
Having issues? You can contact us here