Hybrid SLNR Precoding for Multi-user Millimeter Wave MIMO Systems

Gautam, Prabhat Raj; Zhang, Li

doi:10.1109/wpmc48795.2019.9096182

Cited by 3 publications

(6 citation statements)

References 15 publications

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“…where we have added an extra orthogonal constraint (16c) on FR which implies the constraint F H R F R = N t I on F R which is a fair constraint in mmWave MIMO. If it were not for the constraint (16b) in problem (16), the solution would be given by the matrix containing the M t leading eigenvectors of F opt F H opt . So, we propose a solution based on iterative power method to solve (16).…”

Section: Hybrid Precoder Based On Iterative Power Methodsmentioning

confidence: 99%

“…If it were not for the constraint (16b) in problem (16), the solution would be given by the matrix containing the M t leading eigenvectors of F opt F H opt . So, we propose a solution based on iterative power method to solve (16). Similar iterative power method is used in the computation of eigenvectors [28].…”

Section: Hybrid Precoder Based On Iterative Power Methodsmentioning

confidence: 99%

“…The works in [14]- [16] present the hybrid precoders for multiple user MIMO where the analog precoders are built from codebooks, similar to [11]- [13]. The precoders based on codebook are limited in performance as there is restriction to choose columns of analog precoder from the codebook.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Precoding for Millimeter Wave MIMO: Trace Optimization Approach

Gautam

Zhang

2022

IEEE Access

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The hybrid precoding problem in point-to-point millimeter wave (mmWave) multiple input multiple output (MIMO) for narrowband channel is established as a Frobenius norm minimization problem. It is translated into trace minimization problem, and two algorithms are proposed to solve it. In the first method based on alternating minimization, we alternately determine the analog precoder and digital precoder, keeping the other constant to minimize the trace. The analog precoding subproblem with the fixed digital precoder is converted into a semi-definite programming (SDP) problem and solved by block coordinate descent (BCD) algorithm with suitable modifications. In the second method, we segregate the analog precoding and digital precoding subproblems by considering orthogonality of analog precoder. The analog precoding is further rephrased as a trace maximization problem and solved by an iterative power method by enforcing orthogonality constraint on the analog precoder. The adapted form of modified Gramm-Schmidt orthogonalization procedure is employed to impose orthogonality on the analog precoder. The proposed methods are extended for wideband channel by considering orthogonal frequency division multiplexing (OFDM). The proposed methods not only exhibit a good performance but also come with lower computational complexity when compared to existing methods with comparable performances.INDEX TERMS Millimeter wave (mmWave) communication, hybrid precoding, trace optimization, alternating minimization, block coordinate descent, power method.

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Section: Hybrid Precoder Based On Iterative Power Methodsmentioning

confidence: 99%

Section: Hybrid Precoder Based On Iterative Power Methodsmentioning

confidence: 99%

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Hybrid Precoding for Millimeter Wave MIMO: Trace Optimization Approach

Gautam

Zhang

2022

IEEE Access

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“…They are low on complexity but also come with low performance. Also depending on codebook to construct analog precoding matrix are the hybrid precoders in [17]- [19], all of which consider a multi-user setting. In [17], the analog precoder and combiners are jointly chosen to maximize the received power.…”

Section: Introductionmentioning

confidence: 99%

Hybrid MMSE Precoding for Millimeter Wave MU-MISO via Trace Maximization

Gautam

Zhang

Fan

2024

IEEE Trans. Wireless Commun.

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In an attempt to alleviate the cost and power consumption in millimeter wave (mmWave) multiple input multiple output (MIMO) systems, hybrid precoding has been put forth as a possible solution. The hybrid precoding replaces the conventional fully digital precoding with a combination of analog and digital precoding to achieve good performance using a significantly smaller number of RF chains compared to the number of antennas. In this paper, we consider a narrowband downlink multiple user multiple-input single-output (MU-MISO) system and propose a hybrid precoding method in order to minimize the mean squared error (MSE) for all users. The analog and digital precoding design subproblems are isolated from each other. Analog precoder design is cast as a trace maximization problem, and solved by an iterative procedure based on truncated singular value decomposition (SVD). The digital precoder is determined subsequently after fixing the analog precoder, using Lagrange's method. The proposed hybrid precoder produces spectral and bit error rate (BER) performances quite close to fully digital precoder, and almost the same as existing high performance hybrid precoders, albeit at a much lower complexity. The proposed precoding method is extended to operate in wideband channel, where it exhibits equally good performance with less complexity.

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“…In the PC architecture, the antennas are divided into subgroups equal to the number of RF chains and each RF chain is connected to all the antennas of only one of the subgroups. Most of the works [1][2][3][4][5] on hybrid precoder consider FC architecture. The advantage of FC architecture is that it provides very good performance even with a smaller number of RF chains compared to the number of antennas.…”

Section: Introductionmentioning

confidence: 99%