Optimized Full-Duplex MIMO DF Relaying With Limited Dynamic Range

Abstract

This paper investigates the transceiver optimization of full-duplex multiple-input multiple-output decode-and-forward (DF) relaying by taking into account the practical factor of limited dynamic range (LDR). Focusing on the maximization of end-to-end achievable rate which involves highly coupled variables, we develop a convergent block coordinate ascent (BCA) algorithm to deal with the complicated optimization problem. In each iteration of BCA, the optimal source beamformer, relay receive beamformer, and destination receive beamformer all admit closed-form solutions. As for the optimization of relay transmit beamformer, we transform the corresponding non-convex maximin problem into a single second-order cone program problem which thus allows an efficient optimal solution. Simulations validate the remarkable performance gain attained by incorporating LDR into the full-duplex DF relaying transceiver optimization.