Achieving the Degrees of Freedom of $2 imes 2 imes 2$ Interference Network with Arbitrary Antenna Configurations
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This paper studies the degrees of freedom (DoF) region of the 2 × 2 × 2 interference network, which is comprised of two sources, two relays and two destinations, each with arbitrary number of antennas. We prove that with linear transceivers, the cut-set outer bound can be achieved without any symbol extensions, except for one specific system setup, which has one-DoF gap to the cut-set bound. We show that to achieve the outer-bound, the transceivers include interference avoidance, cancelation, neutralization and alignment, depending on the antenna configuration. © 2014 IEEE.
author list (cited authors)
Wu, D., Yang, C., & Xiong, Z.