Paper Info
Title
Multi-group multi-way relaying with reduced number of relay antennas
Abstract
In this paper, multi-group multi-way relaying is considered. There are L groups with K nodes in each group. Each node wants to share d data streams with all the other nodes in its group. A single MIMO relay assists the communications. The relay does not have enough antennas to spatially separate the data streams. However, the relay assists in performing interference alignment at the receivers. In order to find the interference alignment solution, we generalize the concept of signal and channel alignment developed for the MIMO Y channel and the two-way relay channel to group signal alignment and group channel alignment. In comparison to conventional multi-group multi-way relaying schemes [1, 2], where at least R ≥ LKd - d antennas are required, in our proposed scheme, exploiting the multiple antennas at the nodes, only R ≥ LKd - Ld antennas are needed. The number of antennas required at the nodes to achieve this is also derived. It is shown that the proposed interference alignment based scheme achieves more degrees of freedom than the reference schemes without interference alignment.
Year
DOI
Venue
2014
10.1109/ICASSP.2014.6854093
Acoustics, Speech and Signal Processing
Keywords
Field
DocType
antennas,relay networks (telecommunication),MIMO relay,channel alignment,interference alignment solution,multigroup multiway relaying,multiple antennas,reduced number,relay antennas,signal alignment,Multi-way relaying,group communication,interference alignment
Relay channel,Mathematical optimization,Data stream mining,Mimo relay,Computer science,Computer network,MIMO,Communication channel,Electronic engineering,Relay,Interference alignment
Conference
ISSN
Citations 
PageRank 
1520-6149
3
0.45
References 
Authors
8
6
Name
Order
Citations
PageRank
Rakash SivaSiva Ganesan1609.30
Hussein Al-Shatri210514.40
Xiang Li3334.68
Tobias Weber410512.55
Anja Klein517389.48
Al-Shatri, H.630.45