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Efficient Algorithms for Constant-Modulus Analog Beamforming

Aakash Arora, Christos G. Tsinos, Bhavani Shankar Mysore R, Symeon Chatzinotas, Bjorn Ottersten
2021 IEEE Transactions on Signal Processing  
Therefore, constant-modulus analog beamforming becomes a viable solution.  ...  Both the beampattern matching problems are cast as a variant of the constant-modulus least-squares problem.  ...  Therefore, constant-modulus analog beamforming becomes a viable solution.  ... 
doi:10.1109/tsp.2021.3094653 fatcat:dw4g6pk6bfdftfnai57c6g3rpq

Analog Beamforming With Antenna Selection For Large-Scale Antenna Arrays

Aakash Arora, Christos G. Tsinos, Bhavani Shankar Mysore R, Symeon Chatzinotas, Bjorn Ottersten
2021 ICASSP 2021 - 2021 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)  
To that end, we propose an efficient and scalable algorithm based on the majorization-minimization (MM) framework for solving the SULS problem.  ...  In this work, we propose a joint design of analog beamforming with antenna selection (AS) or antenna placement (AP) for an analog beamforming system.  ...  To overcome the aforementioned problems with the existing approaches, herein we propose an efficient and scalable algorithm for LSAAs.  ... 
doi:10.1109/icassp39728.2021.9414673 fatcat:f65t2xch4jcpbbxtgwpqo2n53e

Hybrid Beamforming for Millimeter Wave Systems Using the MMSE Criterion

Tian Lin, Jiaqi Cong, Yu Zhu, Jun Zhang, Khaled Ben Letaief
2019 IEEE Transactions on Communications  
Specifically, a manifold optimization based HBF algorithm is firstly proposed, which directly handles the constant modulus constraint of the analog component. Its convergence is then proved.  ...  Hybrid analog and digital beamforming (HBF) has recently emerged as an attractive technique for millimeter-wave (mmWave) communication systems.  ...  Anqi Jiang at Fudan University for their help in the proof of Lemma 3.  ... 
doi:10.1109/tcomm.2019.2893632 fatcat:ok2az3xexnhlpg7xaw2c2zu4ku

Energy efficient MIMO SWIPT by hybrid analog-digital beamforming

Ang Li, Christos Masouros
2017 2017 IEEE 18th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)  
Based on the observation that the fully-digital beamformer consists of only the information beamformer, we propose an iterative hybrid analog-digital beamforming scheme, where we design the analog beamformer  ...  In this paper, we investigate the simultaneous wireless information and power transfer (SWIPT) for MIMO systems with limited RF chains at the base station.  ...  The optimization P 3 is difficult to solve due to the non-convex constant modulus constraint for the analog beamformer F RF .  ... 
doi:10.1109/spawc.2017.8227793 dblp:conf/spawc/LiM17 fatcat:cfvlmuvisjftppcr25st2t5b5a

Robust Hybrid Beamforming Scheme for Millimeter-Wave Massive-MIMO 5G Wireless Networks

Saleem Latteef Mohammed, Mohammed H. Alsharif, Sadik Kamel Gharghan, Imran Khan, Mahmoud Albreem
2019 Symmetry  
Therefore, to solve these problems, this paper proposes a low-complexity hybrid beamforming scheme for mmWave Massive-MIMO 5G wireless networks.  ...  Simulation results showed that the proposed hybrid beamforming algorithm had better performance than existing state-of-the-art algorithms, and similar performance with the optimal digital precoding algorithm  ...  (15) An analog beamforming matrix that satisfies the constant-modulus requirement can be obtained from Equation (15) .  ... 
doi:10.3390/sym11111424 fatcat:bs3e5r3kf5gyteb234una4hi5m

Beamforming Design for Large-Scale Antenna Arrays Using Deep Learning [article]

Tian Lin, Yu Zhu
2019 arXiv   pre-print
Beamforming (BF) design for large-scale antenna arrays with limited radio frequency chains and the phase-shifter-based analog BF architecture, has been recognized as a key issue in millimeter wave communication  ...  In this letter, we propose a deep learning based BF design approach and develop a BF neural network (BFNN) which can be trained to learn how to optimize the beamformer for maximizing the spectral efficiency  ...  to the transmit antenna array, we cannot apply the traditional DL design approach [5] , [6] which can guarantee that the output analog beamformer satisfies the constant modulus constraint. • Robustness  ... 
arXiv:1904.03657v2 fatcat:hvhpgvnj3nhtdkhjf3aatzlzum

Hybrid Beamforming for MISO System via Convolutional Neural Network

Teng Zhang, Anming Dong, Chuanting Zhang, Jiguo Yu, Jing Qiu, Sufang Li, You Zhou
2022 Electronics  
In this work, a low-complexity convolutional neural network (CNN)-based HBF algorithm is proposed to solve the SE maximization problem under the constant modulus constraint and transmit power constraint  ...  We discuss the performance of the proposed algorithm in terms of both the generalization ability for multiple CSIs and the specific solving ability for an individual CSI, respectively.  ...  Specifically, we investigate an HBF optimization problem for a MISO system that aims to maximize spectral efficiency under the constant modulus constraint of the analog phase shifters and the power constraint  ... 
doi:10.3390/electronics11142213 fatcat:y2xxlvvfijeyvengc3w3hrcfqy

An Efficient Interference-Aware Constrained Massive MIMO Beamforming for mm-Wave JSDM [article]

Murat Bayraktar, Gokhan Muzaffer Guvensen
2021 arXiv   pre-print
Then, constant-modulus constrained approximations of unconstrained beamformer are obtained by utilizing alternating minimization algorithms for fully connected arrays and fixed subarrays.  ...  This paper investigates interference-aware pre-beamformer (analog beamformer) design for joint spatial division and multiplexing (JSDM) which is a user-grouping based two-stage beamforming method.  ...  However, none of these analog beamformers obey constant-modulus constraint.  ... 
arXiv:2103.12151v1 fatcat:u3lkzpq3k5avfbnfvge2fz3wny

Constant modulus hybrid beamforming for multi-user systems in the presence of blockers

Mohammed Reda Bekkar, Benoit Miscopein, Serge Bories, Laurent Ros, Cyrille Siclet
2018 2018 25th International Conference on Telecommunications (ICT)  
However jointly designing the digital beamforming matrix and the analog beamforming matrix with constant modulus entries makes the optimal signal-to-interferenceplus-noise ratio (SINR) solution complex  ...  The solution consists of setting the analog weights phases equal to those of a full digital beamformer and keeping the modulus of the weights constant, while the complementary digital part is designed  ...  Hybrid solutions Joint optimisation of the effective beamforming matrix AD under the constant modulus constraint is known to be a non-convex problem [8] .  ... 
doi:10.1109/ict.2018.8464941 dblp:conf/ict/BekkarMBRS18 fatcat:53abpwrorrevbcshv7wdlb4e2u

PrecoderNet: Hybrid Beamforming for Millimeter Wave Systems Using Deep Reinforcement Learning [article]

Qisheng Wang, Keming Feng
2019 arXiv   pre-print
However, fully digital beamforming structure becomes infeasible due to its prohibitively high hardware cost and unacceptable energy consumption while traditional hybrid beamforming algorithms have unnegligible  ...  In this paper, we consider a mmWave point-to-point massive multiple-input-multiple-output (MIMO) system and propose a new hybrid analog and digital beamforming (HBF) scheme based on deep reinforcement  ...  Where W opt represents the product of W opt RF W opt BB and analog beamformer W RF still has to satisfy the constant modulus constraint (13a).  ... 
arXiv:1907.13266v1 fatcat:ccq7fwn3pjdvthdy72vziw6wvm

Energy Efficiency Beamforming Design for UAV Communications with Broadband Hybrid Polarization Antenna Arrays

Gui Zhou
2019 IEEE Access  
unit modulus constraints in analog beamformer.  ...  In this paper, we study energy efficient beamforming for UAV communications, where a wideband hybrid polarized antenna array with tapped-delay-lines (TDLs) structure is deployed on the UAV.  ...  efficient objective functions and unit modulus constraints of the analog beamformer, an iterative beamforming algorithm is proposed.  ... 
doi:10.1109/access.2019.2904692 fatcat:5p7qhby3mjfivnw77tarvjg6u4

Joint Design of Digital and Analog Processing for Downlink C-RAN with Large-Scale Antenna Arrays [article]

Jaein Kim, Seok-Hwan Park, Osvaldo Simeone, Inkyu Lee, Shlomo Shamai
2017 arXiv   pre-print
An iterative algorithm is proposed that is based on successive convex approximation and on the relaxation of the constant modulus constraint.  ...  Fronthaul capacity and per-RRH power constraints are enforced along with constant modulus constraints on the RF beamforming matrices.  ...  Fronthaul capacity and per-RRH transmit power constraints are imposed, as well as constant modulus constraints on the RF beamforming matrices, which consist of analog phase shifters.  ... 
arXiv:1704.00455v1 fatcat:3wu7fklyvvhkhcglukglcyelfi

Beamforming Design for Simplified Analog Antenna Combining Architectures

Fouad Gholam, Javier Via, Ignacio Santamaria
2011 IEEE Transactions on Vehicular Technology  
From a baseband point of view, each architecture poses a different beamforming design problem in which the transmit/receive beamformers are constrained to have constant-modulus complex, real, or nonnegative  ...  In this paper, we design algorithms for three new radio-frequency (RF) architectures that are based on different combinations of phase shifters and variable gain amplifiers.  ...  ), or constant-modulus complex weights (EGB).  ... 
doi:10.1109/tvt.2011.2142205 fatcat:eqbquzymnfhlxgkknkv6zivrea

Amplitude-Constrained Constellation and Reflection Pattern Designs for Directional Backscatter Communications Using Programmable Metasurface [article]

Wei Wang, Bincheng Zhu, Yongming Huang, Wei Zhang
2022 arXiv   pre-print
To solve the problem, we propose a constant-modulus power iteration method, which is proven to be monotonically increasing, to maximize the objective function in each iteration.  ...  The large-scale reflector array of programmable metasurfaces is capable of increasing the power efficiency of backscatter communications via passive beamforming and thus has the potential to revolutionize  ...  Compatibility: The element of analog beamforming vector is either of constant modulus or zero-valued (deactivated). Analog beamforming vector can be readily applied to passive beamforming.  ... 
arXiv:2203.03863v1 fatcat:y2s7qyjf3ngu3eo74clpgfbl6y

An Efficient Interference-Aware Constrained Massive MIMO Beamforming for mm-Wave JSDM

Murat Bayraktar, Gokhan M. Guvensen
2021 IEEE Access  
However, none of these analog beamformers obey constant-modulus constraint.  ...  However, phase-shifter networks are preferred for the analog beamforming stage in practice [3] . Hence, our goal is to find a constant-modulus approximation to near-optimal GEB of each group.  ...  Hence, same statistical analog beamforming method proposed in Section III-A can be used for the multiantenna user case.  ... 
doi:10.1109/access.2021.3089677 fatcat:bxq7wn767vgzleljbc4re7uat4
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