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Low Resolution Phase Shifters Suffice for Full-Duplex mmWave Communications
KTH, School of Electrical Engineering and Computer Science (EECS), Network and Systems Engineering.ORCID iD: 0000-0002-4503-4242
Rice University.ORCID iD: 0000-0003-1898-5787
KTH, School of Electrical Engineering and Computer Science (EECS), Automatic Control.ORCID iD: 0000-0002-2289-3159
KTH, School of Electrical Engineering and Computer Science (EECS), Network and Systems Engineering.ORCID iD: 0000-0001-9810-3478
2019 (English)In: IEEE International Conference on Communications: Workshop on Full-Duplex Communications for Future Wireless Networks, Shangai, China: IEEE Communications Society, 2019Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Full-duplex base-stations with half-duplex nodes,allowing simultaneous uplink and downlink from different nodes,have the potential to double the spectrum efficiency withoutadding additional complexity at mobile nodes. Hybrid beam-forming is commonly used in millimeter-wave systems for itsimplementation efficiency. An important element of hybrid beam-forming is quantized phase shifters. In this paper, we ask iflow-resolution phase shifters suffice for beamforming-based full-duplex millimeter-wave systems. We formulate the problem ofjoint design for both self-interference suppression and downlinkbeamforming as an optimization problem, which we solve usingpenalty dual decomposition to obtain a near-optimal solution.Numerical results indicate that low-resolution phase shifters canperform close to systems that use infinite phase shifter resolution,and that even a single quantization bit outperforms half-duplextransmissions in both low and high residual self-interferencescenarios.

Place, publisher, year, edition, pages
Shangai, China: IEEE Communications Society, 2019.
Keywords [en]
full-duplex, millimeter wave, beamforming, phase shifter
National Category
Telecommunications
Research subject
Electrical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-246220OAI: oai:DiVA.org:kth-246220DiVA, id: diva2:1306296
Conference
IEEE International Conference on Communications
Funder
Lars Hierta Memorial Foundation, FO2017-0236
Note

QC 20190617

Available from: 2019-04-23 Created: 2019-04-23 Last updated: 2019-06-17Bibliographically approved

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