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arXiv · 1307.3796

Self-Interference Cancellation with Nonlinear Distortion Suppression for Full-Duplex Systems

Elsayed Ahmed·Ahmed M. Eltawil·Ashutosh Sabharwal
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Abstract

In full-duplex systems, due to the strong self-interference signal, system nonlinearities become a significant limiting factor that bounds the possible cancellable self-interference power. In this paper, a self-interference cancellation scheme for full-duplex orthogonal frequency division multiplexing systems is proposed. The proposed scheme increases the amount of cancellable self-interference power by suppressing the distortion caused by the transmitter and receiver nonlinearities. An iterative technique is used to jointly estimate the self-interference channel and the nonlinearity coefficients required to suppress the distortion signal. The performance is numerically investigated showing that the proposed scheme achieves a performance that is less than 0.5dB off the performance of a linear full-duplex system.

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Elsayed Ahmed, Ahmed M. Eltawil, Ashutosh Sabharwal. 2013-07-14. Self-Interference Cancellation with Nonlinear Distortion Suppression for Full-Duplex Systems. https://doi.org/10.1109/acssc.2013.6810483

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