Self-Interference Cancellation-Based Mutual-Coupling Model for Full-Duplex Single-Channel MIMO Systems

Abstract EN

The challenge of a full-duplex single-channel system is the method to transmit and receive signals simultaneously at the same time and on the same frequency.

Consequently, a critical issue involved in such an operation is the resulting self-interference.

Moreover, for MIMO system, the full-duplex single-channel system is subjected to the very strong self-interference signals due to multiple transmitting and receiving antennas.

So far in the pieces of literature, there have not been any suitable techniques presented to reduce the self-interference for full-duplex single-channel MIMO systems.

This paper initially proposes the method to cancel the self-interference by utilizing the mutual-coupling model for self-interference cancellation.

The interference can be eliminated by using a preknown interference, that is, the mutual-coupling signals.

The results indicate that the channel capacity performance of the proposed technique can significantly be improved due to the reduction of the self-interference power.

The measurement results indicate that the proposed MIMO system can suppress the self-interference and mutual-interference signals with the reduction of 31 dB received power.