Interference-avoiding MIMO schemes for device-to-device radio underlaying cellular networks

TLDR

Device‑to‑device (D2D) communication underlaying cellular networks promises spectrally efficient, low‑latency local services, yet introduces severe interference between cellular and D2D radios. This work proposes MIMO transmission schemes for the cellular downlink that prevent interference to a co‑channel D2D receiver. The schemes employ MIMO designs that steer or null the downlink signal toward the D2D receiver while maintaining cellular performance. Simulations show the approach yields up to 15 dB improvement in D2D SINR and about 10 % increase in overall cell capacity.

Abstract

An underlaying direct Device-to-Device (D2D) communication mode in future cellular networks, such as IMT-Advanced, is expected to provide spectrally efficient and low latency support of e.g. rich multi-media local services. Enabling D2D links in a cellular network presents a challenge in transceiver design due to the potentially severe interference between the cellular network and D2D radios. In this paper we propose MIMO transmission schemes for cellular downlink that avoid generating interference to a D2D receiver operating on the same time-frequency resource. System simulations demonstrate that substantial gains in D2D SINR of up to 15 dB and around 10% total cell capacity gains can be obtained by using the proposed scheme.