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The recent progress in the area of self-interference cancellation (SIC)design has enabled the development of full-duplex (FD) single and multipleantenna systems. In this paper, we propose a design for FD eNodeB (eNB) anduser equipment (UE) for 5G networks. The use of FD operation enablessimultaneous in-band uplink and downlink operation and thereby cutting down thespectrum requirement by half. FD operation requires the same subcarrierallocation to UE in both uplink and downlink. Long Term Evolution LTE) usesorthogonal frequency division multiple access (OFDMA) for downlink. To enableFD operation, we propose using single carrier frequency division multipleaccess SC-FDMA) for downlink along with the conventional method of using it foruplink. Taking advantage of channel reciprocity, singular value decomposition(SVD) based eamforming in the downlink allows multiple users (MU) to operate onsame set of subcarriers. In uplink, frequency domain minimum mean square error(MMSE) equalizer along with successive interference cancellation with optimalordering (SSIC-OO) algorithm is used to decouple signals of users operating inthe same set of subcarriers. The work includes simulations showing efficient FDoperation both at UE and eNB for downlink and uplink respectively.

Full-Duplex eNodeB and UE Design for 5G Networks