Deakin University
Browse

File(s) under permanent embargo

Hierarchically modulated network coding for asymmetric two-way relay systems

journal contribution
posted on 2010-06-01, 00:00 authored by J M Park, S L Kim, Jinho ChoiJinho Choi
Network coding has been known as a spectrally efficient technique in wireless networks. However, when it is applied to a two-way relay channel (TWRC), it suffers from performance degradation caused by the asymmetric position of the relay. In this paper, we suggest remedying this problem by using hierarchical modulation at the source node. We investigate how hierarchical modulation can be incorporated and optimized with network coding. Our results are encouraging in that hierarchically modulated network coding (HMNC) significantly improves end-to-end bit-error probability and spectral efficiency in asymmetric relay channels, as compared with direct transmission (DT), bidirectional network coding (BNC), and coded bidirectional relay (CBR).

History

Journal

IEEE transactions on vehicular technology

Volume

59

Issue

5

Pagination

2179 - 2184

Publisher

IEEE

Location

Piscataway, N.J.

ISSN

0018-9545

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2010, IEEE