Power allocation for MIMO two-way relay network

• Published in: 2009 7th International Conference on Information, Communications and Signal Processing pp. 1 - 5
• Main Authors: Jonghyun Lee, Khanh, T.G., Sakaguchi, K., Araki, K.
• Format: Conference Proceeding
• Language: English; Japanese
• Published: IEEE 01.12.2009
• Subjects: Degradation; Interference cancellation; MIMO; MIMO two-way relay network; Multiple access interference; Network topology; Numerical simulation; perron-frobenius theorem; power allocation; Power engineering and energy; quasi-convex; Relays; Signal to noise ratio; Spread spectrum communication
• ISBN: 9781424446568; 1424446562
• DOI: 10.1109/ICICS.2009.5397526

MIMO two-way relay is a well known method for realizing highly efficient multi-hop relay networks. Previous works in MIMO two-way relay network have focused on an equidistant topology of the relay nodes. However such a topology rarely exists in a practical situation. In a non-equidistant topology, the end-to-end network capacity degrades severely due to the bottleneck link caused by uneven SNR. Furthermore, the end-to-end network capacity also degrades at high SNR due to overreach interference from far nodes existing in multi-hop relay networks. In this paper, we focus on the non-equidistant topology of the MIMO two-way relay network, and apply three transmit power allocation schemes for balancing and maximizing the SINR of each link, i.e. Eigen-value based Power Allocation (EPA), Optimal Power Allocation (OPA) and Distributed Power Allocation (DPA) schemes. The efficiency of proposed schemes is validated using numerical simulations.