Hybrid precoding for multi-user mmWave systems based on MMSE criterion

Cong, Jiaqi; Li, Xianchi; Zhu, Yu

doi:10.23919/apcc.2017.8303999

Cited by 11 publications

(10 citation statements)

References 13 publications

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“…As a result, the problem with this approach is also the size of codebooks. In [20] estimates analog and digital precoding via the general eigenvalue decomposition (GEVD) method. However, complexity is also a significant drawback.…”

Section: Literature Surveymentioning

confidence: 99%

Multi-User Massive MIMO Systems Based on Hybrid Analog-Digital Beamforming for Millimeter-wave Communications

Hussein¹,

Khamiss²

2020

IJIES

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The rapid growth of traffic data will encounter future wireless communication. Unfortunately, the microwave spectrum cannot meet such rapid development. While Millimeter-wave (mm-wave) band can support the rapid growth of traffic owing to such band offers the enormous available bandwidth and multi-gigabit-per-second (Gbps) data rates. Therefore, a hybrid Beamforming solution (HBF) is a promising approach that exploits the small matrix digital precoding and the high matrix analog beamforming. This study addresses the question of how to effectively design and simulation of a low complexity hybrid precoding. It achieves near-fully digital precoding performance based on the hybrid minimum mean square error (MMSE) criterion and extraction of the angle phase for the analog beamforming as well as the Kalman precoding for the digital precoding. Thus, the results indicate that the proposed hybrid precoding has the best performance than the ZF hybrid precoding, the MMSE hybrid precoding, and the Kalman hybrid precoding in terms of computational complexity and spectral efficiency. The proposed solution achieves almost 2.257 bps/Hz, at 20 dB with 3 number of paths and 3 number of scattering clusters compared to the Kalman precoding, almost 2.704 bps/Hz related to the MMSE precoding, and 2.95 bps/Hz compared to the Zero Forcing (ZF) under the same conditions. On the other hand, proposed precoding harvests 8.554 bps/Hz related to the analog beamforming while -1.178 bps/Hz concerning the full digital precoding that is considered as an optimal value. This research has thrown up many questions in need of further investigation.

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Section: Literature Surveymentioning

confidence: 99%

Multi-User Massive MIMO Systems Based on Hybrid Analog-Digital Beamforming for Millimeter-wave Communications

Hussein¹,

Khamiss²

2020

IJIES

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“…1) Digital Precoder Design: We first fix V RF and optimize β and V D . As shown in [7], the original precoder V D can be separated as V D = β −1 V D , where V D is an unconstrained baseband precoder and β has the function of guaranteeing the transmit power constraint. Based on the KKT conditions, it can be shown that the optimal V D and β are given by 2) Analog Precoder Design: By substituting the above optimal digital precoder into the sum-MSE and using the matrix inversion lemma, we have…”

Section: A Hybrid Precoder Designmentioning

confidence: 99%

“…More recently, the authors in [6] investigated the the orthogonal matching pursuit (OMP) based HBF algorithm under the minimum mean square error (MMSE) criterion. To enhance the performance, in [7], the authors proposed a nearoptimal multiuser MMSE HBF scheme in MISO scenario.…”

Section: Introductionmentioning

confidence: 99%

“…Hybrid analog and digital beamforming (HBF) design has recently been recognized as a key technology in millimeter wave (mmWave) communication systems to improve the spectral efficiency and/or energy-efficiency at affordable hardware cost and power consumption [1]- [3]. Although its application to multiuser multiple input and multiple output (MIMO) mmWave systems enables spatial division multiple access, there also exist big challenges since the signals at different users cannot be cooperatively processed [1], [4]- [7].…”

Section: Introductionmentioning

confidence: 99%

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Hybrid MMSE Beamforming for Multiuser Millimeter-Wave Communication Systems

2018

Self Cite

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This letter investigates the hybrid analog and digital beamforming (HBF) design for multiuser millimeter wave (mmWave) communication systems based on the minimum mean square error (MMSE) criterion. Using the alternating minimization method, the hybrid precoder of the base station (BS) and the hybrid combiners of the users are alternatively optimized. It is shown that both the optimized digital precoder of the BS and the digital combiners of the users have closed-form expressions, and their corresponding analog ones can be efficiently obtained via generalized eigen-decomposition. Simulation results show that the proposed MMSE HBF scheme has fast convergence and performs close to the fully digital beamforming.

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“…In particular, the only difference here is the analog combiner design, which is selected separately at each MS, while the analog precoders are jointly designed for the entire MSs at BS. To enhance the spectral efficiency, in a previous work, the authors directly solved the MMSE‐based hybrid precoding problem by using the general eigenvalue decomposition (GEVD) algorithm. To minimize the error between the hybrid equalizer and the baseband equalizer, in Nguyen et al, the MMSE‐based hybrid combiner was implemented with the same method as that in previous studies .…”

Section: Introductionmentioning

confidence: 99%

On the MMSE‐based multiuser millimeter wave MIMO hybrid precoding design

Elmagzoub

2020

Int J Communication

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Summary A hybrid MMSE‐based precoder and combiner design with low complexity is studied in this paper for both the downlink and uplink multiuser millimeter wave MIMO systems. At first, according to the underlying channel knowledge, the phases of the RF precoder and combiner are manipulated by using the MMSE criterion. On the basis of the MMSE‐based analog precoder design, the MMSE‐based digital baseband precoder can be readily derived. Thus, this method combines the advantage of using the MMSE precoding and phase extraction technique to obtain a reasonable solution. The proposed hybrid precoding design will be examined in both the uplink and downlink multiuser MIMO systems. Numerical results are presented to show that the proposed MMSE‐based hybrid precoding design is capable of attaining superior performance in terms of both the spectral efficiency and energy efficiency over the existing designs. Moreover, we will show that the MMSE‐based design can be readily extended to the multiuser millimeter wave MISO systems when only statistical channel state information is available.

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Hybrid precoding for multi-user mmWave systems based on MMSE criterion

Cited by 11 publications

References 13 publications

Multi-User Massive MIMO Systems Based on Hybrid Analog-Digital Beamforming for Millimeter-wave Communications

Multi-User Massive MIMO Systems Based on Hybrid Analog-Digital Beamforming for Millimeter-wave Communications

Hybrid MMSE Beamforming for Multiuser Millimeter-Wave Communication Systems

On the MMSE‐based multiuser millimeter wave MIMO hybrid precoding design

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