Paper Info
Title
Implementation of a real-time wireless interference alignment network
Abstract
Interference alignment (IA) is a cooperative transmission technique for the interference channel. This paper describes two testbeds that implement real-time Multiple-input multiple-output (MIMO) IA for a network with three 2-antenna user pairs using software defined radio techniques: a PC-based testbed for rapid prototyping of potential IA protocols and an embedded testbed for evaluating IA under real-world computational constraints. The IA implementations rely on a wired backbone to share global channel state information (CSI) and a shared clock for frequency and timing synchronization. The testbeds are used to demonstrate the viability of IA, and to compare its robustness with several alternative transmission strategies, such as 2 × 2 MIMO TDMA, in terms of sum-rates. Results show that we are able to successfully achieve over-the-air IA in our three-user 2×2 MIMO testbed. The paper highlights key challenges with the practical realization of IA that are encountered while developing the testbed and identifies areas for future research.
Year
DOI
Venue
2012
10.1109/ACSSC.2012.6488968
Signals, Systems and Computers
Keywords
DocType
ISSN
MIMO communication,antenna arrays,cooperative communication,protocols,radio networks,radiofrequency interference,software radio,synchronisation,time division multiple access,2-antenna user pairs,CSI,MIMO IA,MIMO TDMA,PC-based testbed,cooperative transmission technique,embedded testbed,frequency synchronization,global channel state information,interference channel,over-the-air IA,potential IA protocols,real-time multiple-input multiple-output IA,real-time wireless interference alignment network,shared clock,software defined radio techniques,timing synchronization,wired backbone
Conference
1058-6393
ISBN
Citations 
PageRank 
978-1-4673-5050-1
5
0.48
References 
Authors
0
6
Name
Order
Citations
PageRank
Jackson W. Massey150.82
Jonathan Starr281.25
Seogoo Lee3292.84
Dongwook Lee441862.32
Andreas Gerstlauer589078.75
Robert W. Heath614415885.64