Feasibility of Interference Alignment for MIMO Two-Way Interference Channel

Kiyeon KIM  Janghoon YANG  Dong Ku KIM  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E99-A    No.2    pp.651-655
Publication Date: 2016/02/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E99.A.651
Type of Manuscript: LETTER
Category: Digital Signal Processing
degrees of freedom,  full-duplex,  interference alignment,  multiple-input multiple-output,  

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The feasibility condition of interference alignment (IA) for multiple-input multiple-output two-way interference channel is studied in this paper. A necessary condition and a sufficient condition on the IA feasibility are established and the sum degrees of freedom (DoF) for a broad class of network topologies is characterized. The numerical results demonstrate that two-way operation with appropriate IA is able to achieve larger sum DoF than the conventional one-way operation.