Abstract
We propose a spatial domain interference cancelation scheme for full duplex bi-directional communication systems. Although the conventional pre-processing filters, such as null space projection and minimum mean square error (MMSE), can eliminate self interference, they require the spatial dimensions more than the number of receive antennas. However, proposed scheme requires only one spatial dimension regardless of the number of receive antennas, which enables more efficient antenna allocation. Simulation results show that proposed scheme obtains higher achievable rate than the half duplex system and the MMSE filter.
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