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Uplink Interference Alignment for Two-Cell MIMO Interference Channels

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1 Author(s)
Kyungchun Lee ; Dept. of Electr. & Inf. Eng., Seoul Nat. Univ. of Sci. & Technol., Seoul, South Korea

In this paper, we present uplink interference alignment (IA) schemes for two-cell multiple-input-multiple-output (MIMO) channels. Assuming that each cell has K interfering users, we propose an IA scheme for the full interference channel (FIC) and derive the achievable degrees of freedom (DOFs). The proposed scheme is extended to a two-cell Z-interference channel (ZIC), where only one of the two cells is subject to interference. The achievable DOF for the two-cell ZIC channel is also derived, and it is compared with that of the FIC with the IA and that of the conventional orthogonal scheme based on numerical results.

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Vehicular Technology, IEEE Transactions on  (Volume:62 ,  Issue: 4 )