MIMO Relaying With Linear Processing for Multiuser Transmission in Fixed Relay Networks
IEEE Transactions on Signal Processing
IEEE Transactions on Information Theory
Degrees of Freedom Region of the MIMO X Channel
IEEE Transactions on Information Theory
Interference Alignment and Degrees of Freedom of the -User Interference Channel
IEEE Transactions on Information Theory
Communication Over MIMO X Channels: Interference Alignment, Decomposition, and Performance Analysis
IEEE Transactions on Information Theory
On feasibility of interference alignment in MIMO interference networks
IEEE Transactions on Signal Processing
Space alignment for cognitive transmission in MIMO uplink channels
EURASIP Journal on Wireless Communications and Networking
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In this paper, we study a new network information flow for a multiple-input multiple-output (MIMO) wireless network system with three users and a single intermediate relay which of each is equipped with multiple antennas. In this system, each user wants to convey independent messages for different two users via the intermediate relay while receiving two independent messages from the other two users by using only two time slots. This network information flow is a generalized version of the two-way relay channel for more than two users case. We will call this network information flow as a 'MIMO Y channel.' To achieve much higher multiplexing gain in the MIMO Y channel, we propose two novel signaling techniques, which are signal space alignment for network coding during the first time slot and network coding based interference nulling beamforming during the second time slot. By evaluating the multiplexing gain it is shown that the proposed signaling scheme significantly outperforms the conventional time division multiple access and multi-user MIMO schemes.