Equalization in amplify-forward full-duplex relay with direct link

An ideal full-duplex relay doubles the achievable data rate compared to a half-duplex relay. However, in practice, the self-interference and processing delay induces an ISI channel between the source and the destination nodes. In this paper, we study the outage performance of a full-duplex relaying network with amplify-and-forward scheme. In contrast to prior work, we include the direct link from the source to destination, and analyze the distribution of the end-to-end signal-to-noise ratio (SNR) with the minimum mean squared error decision feedback equalizer. We observe that the direct link provides a significant SNR gain, and including it is particularly important for self-interference combating at the receiver.