Hardware Impairments Aware Transceiver Design for Bidirectional Full-Duplex MIMO OFDM Systems

Taghizadeh, Omid; Radhakrishnan, Vimal; Cırık, Ali Çağatay; Mathar, Rudolf; Lampe, Lutz

doi:10.1109/tvt.2018.2839661

Cited by 40 publications

(35 citation statements)

References 59 publications

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“…In this section, we evaluate the sum-outage-minimizing hybrid robust mmWave beamforming method proposed above, comparing its performance against three fully digital schemes, namely, the OutMin technique of [28], the SRM method [42], and the classic maximum ratio transmission (MRT).…”

Section: Performance Assessmentmentioning

confidence: 99%

A Stochastic Gradient Descent Approach for Hybrid mmWave Beamforming With Blockage and CSI-Error Robustness

et al. 2021

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In this study, we consider the downlink beamforming problem in millimeter wave (mmWave) systems subjected to both path blockages and imperfect channel state information (CSI), and propose a new robust hybrid sum-outage minimizing design as a solution. We first formulate the problem as an empirical risk minimization (ERM) stochastic learning problem, whose solution can be obtained by the alternate iteration of a baseband digital and a radio frequency (RF) analog Riemann manifold-constrained beamforming updates through a mini-batch stochastic gradient descent (MSGD) approach, with gradient minimizing update rules given in closed-form, and learning rates optimized based on the lower-bounds of the corresponding Lipschitz constants. Unlike existing solutions to the path blockage-robust mmWave beamforming problem, wherein out-of-band side information is required or perfect CSI is assumed, our method relies only on the estimates and statistical knowledge of the channel's angles of departure (AoD) and complex gains, which are simultaneously captured in a Bernoulli-Gaussian model and used to generate the training data for the MSGD-based optimizer. Further, unlike preceding fully-digital or fullyconnected hybrid contributions, the proposed scheme assumes a virtually-configured partially-connected setup; therefore, it is compatible with coordinated multipoint (CoMP) architectures, which are known to be crucial in terms of exploiting the full potential of mmWave systems. Simulation results confirm the effectiveness of our MSGD-based robust hybrid CoMP mmWave beamformer in mitigating the effects of path blockage and CSI error, demonstrating its superiority to state-of-the-art (SotA) alternatives.INDEX TERMS Millimeter wave systems, distributed hybrid beamforming, stochastic gradient descent, cooperative multi-point downlink beamforming.

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Section: Performance Assessmentmentioning

confidence: 99%

A Stochastic Gradient Descent Approach for Hybrid mmWave Beamforming With Blockage and CSI-Error Robustness

et al. 2021

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“…The impact of hardware elements inaccuracy in each chain is modeled as additive distortion terms, following the transceiver impairments model proposed in [28] and widely used in the context of FD system design and performance analysis, e.g., [7], [8], [31], [35]- [40]. The proposed model in [28] is based on the following three observations.…”

Section: Distortion Signal Statisticsmentioning

confidence: 99%

Full-Duplex Amplify-and-Forward MIMO Relaying: Design and Performance Analysis Under Erroneous CSI and Hardware Impairments

Taghizadeh

Stańczak

Iimori

et al. 2021

IEEE Open J. Commun. Soc.

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Full-duplex amplify-and-forward multiple-input multiple-output relaying has been the focus of several recent studies, due to the potential for achieving a higher spectral efficiency and lower latency, together with inherent processing simplicity. However, when the impact of hardware distortions are considered, such relays suffer from a distortion-amplification loop, due to the inter-dependent nature of the relay transmit signal covariance and the residual self-interference covariance. The aforementioned behavior leads to a significant performance degradation for a system with a low or medium hardware accuracy. In this work, we analyze the relay transfer function as well as the mean squared-error performance of a full-duplex amplify-and-forward multiple-input multiple-output relaying communication, under the impact of collective sources of additive and multiplicative transmit and receive impairments. Building on the performed analysis, an optimization problem is devised to minimize the communication Mean Squared-Error and solved by employing the recently proposed penalty dual-decomposition framework. The proposed solution converges to a stationary point of the original problem via a sequence of convex quadratic programs, thereby enjoying an acceptable arithmetic complexity as the problem dimensions grow large. Numerical simulations verify the significance of the proposed distortion-aware design and analysis, compared to the common simplified approaches, as the hardware accuracy degrades.

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“…where κ (n) (β (n) ) represents the transmit (receive) distortion coefficient relating the collective power of the intended transmit (receive) signal to the distortion signal variance in the n-th subcarrier 2 [28]. It is worth mentioning that the impacts of the discussed inaccuracies, i.e., e t,l , e r,l , E (n) bb , become significant for a FD transceiver due to the strong SI channel.…”

Section: A Residual Si Modelmentioning

confidence: 99%

“…From (26) we obtain a water-filling solution structure which can be expressed as in (28), where λ > 0 holds the concept of water level, c.f. [21,Equation (17)].…”

Section: B Analytical Computational Complexitymentioning

confidence: 99%

Sum secrecy rate maximization for multi-carrier MIMOME systems with full-duplex jamming

Yang

Taghizadeh

Mathar

2019

Physical Communication

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Hardware Impairments Aware Transceiver Design for Bidirectional Full-Duplex MIMO OFDM Systems

Cited by 40 publications

References 59 publications

A Stochastic Gradient Descent Approach for Hybrid mmWave Beamforming With Blockage and CSI-Error Robustness

A Stochastic Gradient Descent Approach for Hybrid mmWave Beamforming With Blockage and CSI-Error Robustness

Full-Duplex Amplify-and-Forward MIMO Relaying: Design and Performance Analysis Under Erroneous CSI and Hardware Impairments

Sum secrecy rate maximization for multi-carrier MIMOME systems with full-duplex jamming

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