关键词: 干扰抑制, 全双工中继, 天线选择

Abstract: The interference caused by the relay transmission to reception in full-duplex relaying has a negative effect on system performance. It is increasingly important to research on interference suppression. Different from the conventional suppression schemes which are based on the weighting matrices, the paper presents a means of suppressing the interference, in which relay antenna subset selection at both transmitted and received sides are considered jointly. The criterion for selecting the antenna subset is to minimize interference channel capacity over fading channels for MIMO relay system. It derives closed-form expression for the end-to-end capacity with this proposed method. As a result, simulations demonstrate that the discussed selection scheme mitigates the interference significantly. Therefore, the link quality is efficiently improved in terms of capacity and Bit Error Rate（BER） while with low system complexity.

Key words: interference suppression, full-duplex relay, antenna selection