Hybrid Precoder and Combiner Design With Low-Resolution Phase Shifters in mmWave MIMO Systems

Millimeter-wave (mmWave) communications have been considered as a key technology for next-generation cellular systems and Wi-Fi networks because of its advances in providing orders-of-magnitude wider bandwidth than current wireless networks. Economical and energy-efficient analog/digital hybrid prec...

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Vydáno v:	IEEE journal of selected topics in signal processing Ročník 12; číslo 2; s. 256 - 269
Hlavní autoři:	Wang, Zihuan, Li, Ming, Liu, Qian, Swindlehurst, A. Lee
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	New York IEEE 01.05.2018 The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:	Antenna arrays Baseband Beamforming Cellular communication Computer simulation Hardware hybrid precoder Iterative algorithms Iterative methods Millimeter wave (mmWave) communications Millimeter waves MIMO communication multiple-input multiple-output (MIMO) one-bit quantization Phase shifters Power consumption Power demand Radio frequency Transceivers Wireless networks
ISSN:	1932-4553, 1941-0484
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Abstract	Millimeter-wave (mmWave) communications have been considered as a key technology for next-generation cellular systems and Wi-Fi networks because of its advances in providing orders-of-magnitude wider bandwidth than current wireless networks. Economical and energy-efficient analog/digital hybrid precoding and combining transceivers have been often proposed for mmWave massive multiple-input multiple-output (MIMO) systems to overcome the severe propagation loss of mmWave channels. One major shortcoming of existing solutions lies in the assumption of infinite or high-resolution phase shifters (PSs) to realize the analog beamformers. However, low-resolution PSs are typically adopted in practice to reduce the hardware cost and power consumption. Motivated by this fact, in this paper, we investigate the practical design of hybrid precoders and combiners with low-resolution PSs in mmWave MIMO systems. In particular, we propose an iterative algorithm which successively designs the low-resolution analog precoder and combiner pair, aiming at conditionally maximizing the spectral efficiency. Then, the digital precoder and combiner are computed based on the obtained effective baseband channel to further enhance the spectral efficiency. In an effort to achieve an even more hardware-efficient large antenna array, we also investigate the design of hybrid beamformers with one-bit resolution (binary) PSs, and present a novel binary analog precoder and combiner optimization algorithm. After analyzing the computational complexity, the proposed low-resolution hybrid beamforming design is further extended to multiuser MIMO communication systems. Simulation results demonstrate the performance advantages of the proposed algorithms compared to existing low-resolution hybrid beamforming designs, particularly for the one-bit resolution PSs scenario.
AbstractList	Millimeter-wave (mmWave) communications have been considered as a key technology for next-generation cellular systems and Wi-Fi networks because of its advances in providing orders-of-magnitude wider bandwidth than current wireless networks. Economical and energy-efficient analog/digital hybrid precoding and combining transceivers have been often proposed for mmWave massive multiple-input multiple-output (MIMO) systems to overcome the severe propagation loss of mmWave channels. One major shortcoming of existing solutions lies in the assumption of infinite or high-resolution phase shifters (PSs) to realize the analog beamformers. However, low-resolution PSs are typically adopted in practice to reduce the hardware cost and power consumption. Motivated by this fact, in this paper, we investigate the practical design of hybrid precoders and combiners with low-resolution PSs in mmWave MIMO systems. In particular, we propose an iterative algorithm which successively designs the low-resolution analog precoder and combiner pair, aiming at conditionally maximizing the spectral efficiency. Then, the digital precoder and combiner are computed based on the obtained effective baseband channel to further enhance the spectral efficiency. In an effort to achieve an even more hardware-efficient large antenna array, we also investigate the design of hybrid beamformers with one-bit resolution (binary) PSs, and present a novel binary analog precoder and combiner optimization algorithm. After analyzing the computational complexity, the proposed low-resolution hybrid beamforming design is further extended to multiuser MIMO communication systems. Simulation results demonstrate the performance advantages of the proposed algorithms compared to existing low-resolution hybrid beamforming designs, particularly for the one-bit resolution PSs scenario.
Author	Li, Ming Swindlehurst, A. Lee Liu, Qian Wang, Zihuan
Author_xml	– sequence: 1 givenname: Zihuan surname: Wang fullname: Wang, Zihuan email: wangzihuan@mail.dlut.edu.cn organization: School of Information and Communication Engineering, Dalian University of Technology, Dalian, China – sequence: 2 givenname: Ming orcidid: 0000-0003-1849-8241 surname: Li fullname: Li, Ming email: mli@dlut.edu.cn organization: School of Information and Communication Engineering, Dalian University of Technology, Dalian, China – sequence: 3 givenname: Qian orcidid: 0000-0003-2282-4572 surname: Liu fullname: Liu, Qian email: qianliu@dlut.edu.cn organization: School of Computer Science and Technology, Dalian University of Technology, Dalian, China – sequence: 4 givenname: A. Lee orcidid: 0000-0002-0521-3107 surname: Swindlehurst fullname: Swindlehurst, A. Lee email: swindle@uci.edu organization: Center for Pervasive Communications and Computing, University of California, Irvine, CA, USA
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SubjectTerms	Antenna arrays Baseband Beamforming Cellular communication Computer simulation Hardware hybrid precoder Iterative algorithms Iterative methods Millimeter wave (mmWave) communications Millimeter waves MIMO communication multiple-input multiple-output (MIMO) one-bit quantization Phase shifters Power consumption Power demand Radio frequency Transceivers Wireless networks
Title	Hybrid Precoder and Combiner Design With Low-Resolution Phase Shifters in mmWave MIMO Systems
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