Is MAC joint decoding optimal for interference channels?

Publikationstyp
Conference Paper
Date Issued
2015
Sprache
English
Author(s)
Zhou, Guangxia  
Xu, Wen  
Bauch, Gerhard  
Institut
Nachrichtentechnik E-8  
TORE-URI
http://hdl.handle.net/11420/3354
Volume
2015
Article Number
7145891
Citation
IEEE Vehicular Technology Conference : 7145891 (2015)
Publisher DOI
10.1109/VTCSpring.2015.7145891
Scopus ID
2-s2.0-84940434728
Harsh interference is a major obstacle to achieve high capacity, especially when the state-of-the-art wireless networks intend to reuse the same resource. Information theoretic study shows that joint decoding with interference can achieve the sum capacity of a strong interference channel. However, the optimal joint decoding technique is too complex for practical applications, because it requires detecting and decoding all messages simultaneously. A two-user strong interference channel can be formed by two two- user multiple access channels (MACs), so a natural question arises as whether the decoding schemes optimal for the MAC remains optimal when applied to the interference channel. This paper investigates the relevant decoding techniques, namely the MAC rate splitting (RS) and iterative detection-decoding. Although these techniques have been shown to be optimal for MACs, we show that they cannot achieve the optimal performance anymore under interference channels.
Subjects
Heterogeneous network
Interference channel
Iterative detectiondecoding
Joint decoding
LTE-A
Rate splitting