TITLE:
New Approach for Relay and Transceiver Design for Interference Alignment in MIMO Interference Channels
AUTHORS:
Hossein Vaezy, Vahid Tabataba Vakili
KEYWORDS:
Interference Alignment; Degree of Freedom; Multiple Input Multiple Output (MIMO); Amplify and Forward (AF)
JOURNAL NAME:
Journal of Computer and Communications,
Vol.1 No.3,
August
28,
2013
ABSTRACT: Wireless relaying has been known to
provide the improvements in link reliability, spectral efficiency, and coverage
extension. In this
paper, we use full duplex relays for Interference Alignment (IA) in K-users
Interference Channel (IC) and show K Degrees of Freedom (DOF) is achievable. In first hop, relays receive signals from
transmitters and forward
them to receivers in second hop. Two iteratively algorithms are proposed for
computing relays function, precoder, and decoder matrices. First algorithm
minimizes leakage interference at receivers that has appropriate performance at
high Signal to Noise Ratio (SNR) region. Furthermore, the second algorithm has
better performance at low-mediate SNR. The performance of proposed algorithms
are compared with other schemes and validated with simulation in terms of
achieved sum rate.