Full-Duplex Transceiver for Future Cellular Network: A Smart Antenna Approach

摘要

In this paper, we propose a transceiver architecture for full-duplex (FD)eNodeB (eNB) and FD user equipment (UE) transceiver. For FDcommunication,.i.e., simultaneous in-band uplink and downlink operation, samesubcarriers can be allocated to UE in both uplink and downlink. Hence, contraryto traditional LTE, we propose using single-carrier frequency division multipleaccesses (SC-FDMA) for downlink along with the conventional method of using itfor uplink. The use of multiple antennas at eNB and singular valuedecomposition (SVD) in the downlink allows multiple users (MU) to operate onthe same set of ubcarriers. In the uplink, successive interference cancellationwith optimal ordering (SSIC-OO) algorithm is used to decouple signals of UEsoperating in the same set of subcarriers. A smart antenna approach is adoptedwhich prevents interference, in downlink of a UE, from uplink signals of otherUEs sharing same subcarriers. The approach includes using multiple antennas atUEs to form directed beams towards eNode and nulls towards other UEs. Theproposed architecture results in significant improvement of the overallspectrum efficiency per cell of the cellular network.