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http://dx.doi.org/10.7840/kics.2013.38B.3.172

Network-Coded Bi-Directional Relaying Over an Asymmetric Channel  

Ryu, Hyun-Seok (고려대학교 전기전자파공학과 무선정보시스템공학 연구실)
Lee, Jun-Seok (LG전자)
Kang, Chung G. (고려대학교 전기전자파공학과 무선정보시스템공학 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.38B, no.3, 2013 , pp. 172-179 More about this Journal
Abstract
In this paper, we consider network-coded bi-directional relaying (NCBR) schemes over an asymmetric channel, in which bi-directional links have the different channel quality, as well as the asymmetric traffic load. In order to deal with asymmetric nature, two different types of NCBR schemes are considered: network coding after padding (NaP) and network coding after fragmentation (NaF). Even if NaP has been known as only a useful means of dealing with the asymmetry in traffic load up to now, our analysis shows that its gain can be significantly lost by the asymmetry in channel quality, under the given bit error performance constraint. Furthermore, it is shown that NaF always outperforms NaP, as well as traditional bi-directional relaying scheme.
Keywords
Cooperative Diversity; Mutually Cooperative Relay; Coordinate-Interleaved Orthogonal Design(CIOD);
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