Robust Hybrid Precoding/Combining Designs for Full-Duplex Millimeter Wave Relay Systems

Luo, Zhen; Zhao, Lei; Li, Tonghui; Liu, Hongqing; Zhang, Rongbin

doi:10.1109/tvt.2021.3097767

Cited by 20 publications

(17 citation statements)

References 20 publications

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“…algorithm. Similarly, a HPC design for FD amplify-andforward (AF) mmWave relay systems is considered in [27], introducing a zero-space SIC method based on correlated mmWave channel estimation errors. A FD mmWave HBF scheme is introduced in [16] for a MU-mMIMO system, where the non-orthogonal beams are generated to serve multiple users while suppressing the near-field component of the SI channel and maximizing the sum-rate capacity.…”

Section: Oj Logomentioning

confidence: 99%

See 1 more Smart Citation

Full-Duplex in Massive Multiple-Input Multiple-Output

Le-Ngoc,

Gong,

Mahmood

et al. 2024

IEEE Open J. Veh. Technol.

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In-band full-duplex (FD) operation can double the spectral efficiency of massive multipleinput multiple-output (mMIMO) systems by allowing simultaneous transmission and reception over the same time/frequency slot. However, the main challenge encountered in implementing an FD radio wireless transceiver is to greatly suppress the residual self-interference (SI) generated from its own transmitter below the receiver noise floor to avoid performance degradation in the detection of the signal of interest received from remote transmitters. It is pointed out that the single-stage digital beamforming (DBF) scheme would introduce an impractically high complexity unsuitable for implementing FD-mMIMO. This paper considers an FD hybrid beamforming (FD-HBF) scheme for multi-user (MU)-mMIMO systems, in which large SI-suppression is achieved by exploring dynamic transmitter/receiver (Tx/Rx) isolation using RF-beamforming designs, and exploiting the degrees of freedom of a large number of antenna elements in separate Tx and Rx antenna arrays, in conjunction with high-performance baseband (BB) digital fractionally-spaced (FS) SI-cancellation (SIC) techniques. This paper starts with a discussion of the main parameters and impairments (in an mMIMO transceiver) that can impact the SI-suppression performance and the proposed RF-beamforming Tx/Rx isolation and BB SI-cancellation design strategies along with their achieved performance and complexities. Joint-beamforming optimization to maximize both Tx/Rx performance and isolation is discussed with an example of a nature-inspired optimization scheme to achieve an average Tx/Rx RF isolation of 64.4 dB and the best isolation of 76 dB. The paper continues with a description of an FD-mMIMO transceiver prototype using Tx/Rx 8x8-element antenna arrays along with analytical, simulation and measured results. Illustrative results indicate that the proposed combination of RF-beamforming Tx/Rx isolation and BB digital fractionally spaced SI-cancellation can offer an overall SI suppression of more than 131 dB and bring the residual SI below the receiver noise floor.INDEX TERMS Full-duplex, mMIMO, hybrid beamforming, antenna isolation, joint-beamforming optimization, beamforming isolation, antenna array, baseband SIC I. INTRODUCTIONM ASSIVE multiple-input and multiple-output (mMIMO) technology has been developed as a viable technique in response to the growing demand for high data rates and enhanced spectral efficiency in wireless communication systems [1]. This technological innovation is integral to the Fifth Generation (5G) and Beyond 5G (B5G) networks, as they exemplify a growing inclination

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Section: Oj Logomentioning

confidence: 99%

“…By maximizing L in (27), we obtain the ML estimation of H. To solve the problem in a low-complexity manner, we consider an iterative procedure [6]. If H is known, L can be maximized by the covariance matrix R:…”

Section: Oj Logomentioning

confidence: 99%

Full-Duplex in Massive Multiple-Input Multiple-Output

Le-Ngoc,

Gong,

Mahmood

et al. 2024

IEEE Open J. Veh. Technol.

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“…The result shows that the proposed low-complexity channel estimation algorithm achieves more precoding gains and spectral efficiency than exhaustive algorithms. In [7], a hybrid precoding/combining designs of full-duplex amplifyand-forward mmWave relay systems was proposed. Their simulation indicated that the proposed design is approaching an all-digital scheme.…”

Section: A Background and Related Workmentioning

confidence: 99%

“…Since the analysis for both users is interchangeable, the secrecy performance of the scenarios in which E is interested in U 2 's message can be obtained based on the results of this manuscript 3. The secrecy performance of scenarios wherein the users are randomly distributed also can be easily obtained based on [32,(7)] and the results of this work.…”

mentioning

confidence: 99%

Outage Analysis of Millimeter Wave RSMA Systems

Lei

Zhang

Park

et al. 2023

IEEE Trans. Commun.

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Millimeter-wave (mmWave) communication has attracted considerable attention from academia and industry, providing multi-gigabits per second rates due to the substantial bandwidth. Rate splitting multiple access (RSMA) is an effective technology that provides a generalized multiple access framework. Regarding the new propagation characteristics of the mmWave, we investigate the outage performance of the mmWave RSMA multiple-input-single-output system with a fixed-located user and a randomly-located user. Based on the spatial correlation of the paired users, the user's paths are divided into overlapped and non-overlapped paths. Two beamforming schemes are proposed to improve the reliability of the mmWave RSMA system. The common stream is transmitted on the overlapped paths or all the paths. By utilizing stochastic geometry theory, the closed-form expressions of the outage probability (OP) with proposed schemes are derived. To obtain more insights, the expressions for the asymptotic OP are derived. Monte Carlo simulation results are presented to validate the analysis and the effects of the system parameters, such as power allocation coefficients and the number of resolvable paths, on the outage performance are investigated.

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“…For the FD mmWave relay topology, the authors in [ 43 ] proposed a hybrid beamforming design to cancel the SI. The work in [ 44 ] presented an alternating method with close-form solutions to design robust hybrid transceivers under imperfect channel estimations. However, all the above works only consider the FD mmWave MIMO systems with FCSs that require large numbers of phase shifters.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Beamforming Design for Self-Interference Cancellation in Full-Duplex Millimeter-Wave MIMO Systems with Dynamic Subarrays

Wang

Yang

Gong

2022

Entropy

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Full-duplex (FD) millimeter-wave (mmWave) multiple-input multiple-output (MIMO) communication is a promising solution for the extremely high-throughput requirements in future cellular systems. The hybrid beamforming structure is preferable for its low hardware complexity and low power consumption with acceptable performance. In this paper, we introduce the hardware efficient dynamic subarrays to the FD mmWave MIMO systems and propose an effective hybrid beamforming design to cancel the self-interference (SI) in the considered system. First, assuming no SI, we obtain the optimal fully digital beamformers and combiners via the singular value decomposition of the uplink and downlink channels and the water-filling power allocation. Then, based on the obtained fully digital solutions, we get the dynamic analog solutions and digital solutions using the Kuhn–Munkres algorithm-aided dynamic hybrid beamforming design. Finally, we resort to the null space projection method to cancel the SI by projecting the obtained digital beamformer at the base station onto the null space of the equivalent SI channel. We further analyze the computational complexity of the proposed method. Numerical results demonstrate the superiority of the FD mmWave MIMO systems with the dynamic subarrays using the proposed method compared to the systems with the fixed subarrays and the half-duplex mmWave communications. When the number of RF chains is 6 and the signal-to-noise ratio is 10 dB, the proposed design outperforms the FD mmWave MIMO systems with fixed subarrays and the half-duplex mmWave communications, respectively, by 22.4% and 47.9% in spectral efficiency and 19.9% and 101% in energy efficiency.

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Robust Hybrid Precoding/Combining Designs for Full-Duplex Millimeter Wave Relay Systems

Cited by 20 publications

References 20 publications

Full-Duplex in Massive Multiple-Input Multiple-Output

Full-Duplex in Massive Multiple-Input Multiple-Output

Outage Analysis of Millimeter Wave RSMA Systems

Hybrid Beamforming Design for Self-Interference Cancellation in Full-Duplex Millimeter-Wave MIMO Systems with Dynamic Subarrays

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