The DoF of the 3-User $(p, p+1)$ MIMO Interference Channel


The degrees of freedom (DoF) of the 3-user multiple-input multiple-output (MIMO) interference channel (IC) with full channel state information (CSI) and constant channel coefficients are characterized when linear filters are employed and (p, p+1) antennas are deployed at the transmitters and receivers, respectively. The point of departure of this paper is the work of Wang et al. [1], which conjectured but not proved the DoF for the configuration tackled in this work. In this work we prove the optimal DoF by means of a transmission scheme based on asymmetric complex signaling (ACS) together with symbol extensions in time and interference alignment (IA) concepts. The paper deals with the p = 2, 3 cases, providing the transmit and receive filters and the tools needed for proving the achievability of the DoF for other values of p.

DOI: 10.1109/TCOMM.2014.2358232

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@article{Torrellas2014TheDO, title={The DoF of the 3-User \$(p, p+1)\$ MIMO Interference Channel}, author={Marc Torrellas and Adrian Agustin and Josep Vidal and Olga Mu{\~n}oz}, journal={IEEE Trans. Communications}, year={2014}, volume={62}, pages={3842-3853} }