TY - GEN
T1 - Low resolution phase shifters suffice for full-duplex mmwave communications
AU - Da Silva, Jose Mairton B.
AU - Sabharwal, Ashutosh
AU - Fodor, Gabor
AU - Fischione, Carlo
N1 - Funding Information:
J. Mairton B. da Silva Jr. would like to acknowledge CNPq, a Brazilian research-support agency, and the Lars Hierta Memorial Foundation. A. Sabhar-wal was supported by NSF under Grant CNS-1518916. G. Fodor was partially supported by the HARALD project of Ericsson Research and KTH Royal Institute of Technology. The simulations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC) at PDC Centre for High Performance Computing (PDC-HPC).
Publisher Copyright:
© 2019 IEEE.
PY - 2019/5
Y1 - 2019/5
N2 - Full-duplex base-stations with half-duplex nodes, allowing simultaneous uplink and downlink from different nodes, have the potential to double the spectrum efficiency without adding additional complexity at mobile nodes. Hybrid beam-forming is commonly used in millimeter wave systems for its implementation efficiency. An important element of hybrid beam-forming is quantized phase shifters. In this paper, we ask if low-resolution phase shifters suffice for beamforming-based full-duplex millimeter wave systems. We formulate the problem of joint design for both self-interference suppression and downlink beamforming as an optimization problem, which we solve using penalty dual decomposition to obtain a near-optimal solution. Numerical results indicate that low-resolution phase shifters can perform close to systems that use infinite phase shifter resolution, and that even a single quantization bit outperforms half-duplex transmissions in both low and high residual self-interference scenarios.
AB - Full-duplex base-stations with half-duplex nodes, allowing simultaneous uplink and downlink from different nodes, have the potential to double the spectrum efficiency without adding additional complexity at mobile nodes. Hybrid beam-forming is commonly used in millimeter wave systems for its implementation efficiency. An important element of hybrid beam-forming is quantized phase shifters. In this paper, we ask if low-resolution phase shifters suffice for beamforming-based full-duplex millimeter wave systems. We formulate the problem of joint design for both self-interference suppression and downlink beamforming as an optimization problem, which we solve using penalty dual decomposition to obtain a near-optimal solution. Numerical results indicate that low-resolution phase shifters can perform close to systems that use infinite phase shifter resolution, and that even a single quantization bit outperforms half-duplex transmissions in both low and high residual self-interference scenarios.
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U2 - 10.1109/ICCW.2019.8756743
DO - 10.1109/ICCW.2019.8756743
M3 - Conference contribution
AN - SCOPUS:85070255997
T3 - 2019 IEEE International Conference on Communications Workshops, ICC Workshops 2019 - Proceedings
BT - 2019 IEEE International Conference on Communications Workshops, ICC Workshops 2019 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 IEEE International Conference on Communications Workshops, ICC Workshops 2019
Y2 - 20 May 2019 through 24 May 2019
ER -