Transmit beamforming aided amplify-and-forward MIMO full-duplex relaying with limited dynamic range

Taghizadeh, Omid; Zhang, Jianshu; Haardt, Martin

doi:10.1016/j.sigpro.2016.02.026

Cited by 35 publications

(28 citation statements)

References 42 publications

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“…Recalling OP in (16), in order to minimize OP, we need to choose the relay transmit power P R according to the transmit power of the source node, the average channel gains of all links, the SIC capability, the average power of AWGN, and the aggregate level of impairments. Noted that there were some optimal power allocation schemes proposed for the AF-FD relay systems in the literature [26,36,37]. However, these works either only focused on the amplification coefficients or optimized power allocation for the ideal hardware systems.…”

Section: Optimal Power Allocation For the Relay Nodementioning

confidence: 99%

Performance Analysis of Full-Duplex Amplify-and-Forward Relay System with Hardware Impairments and Imperfect Self-Interference Cancellation

Nguyen

Tran

2019

Wireless Communications and Mobile Computing

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In this paper, we analyze the performance of a full-duplex (FD) amplify-and-forward (AF) relay system with imperfect hardware. Besides the aggregate hardware impairments of the imperfect transceiver, we also consider the impact of residual self-interference (RSI) due to imperfect cancellation at the FD relay node. An analytical framework for analyzing the system performance including exact outage probability (OP), asymptotic OP, and approximate symbol error probability (SEP) is developed. In order to tackle these impacts, we propose an optimal power allocation scheme which can improve the outage performance of the FD relay node, especially at the high signal-to-noise ratio (SNR) regime. Numerical results are presented for various evaluation scenarios and veri ed using the Monte Carlo simulations.

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Section: Optimal Power Allocation For the Relay Nodementioning

confidence: 99%

Performance Analysis of Full-Duplex Amplify-and-Forward Relay System with Hardware Impairments and Imperfect Self-Interference Cancellation

Nguyen

Tran

2019

Wireless Communications and Mobile Computing

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“…Moreover, the performance of MuStR1 is improved by introducing an alternating update (AltMuStR1) at the cost of a slightly higher computational complexity compared to MuStR1. Similar to the previous parts, this approach differs from the rank-1 FD-AF relaying schemes proposed in [33,Subsection 3.2] and [30,Section III], where the impact of distortions are not considered in the design of transmit/receive strategies. Numerical simulations show that for a system with a small thermal noise variance, or a high power or transceiver inaccuracy, the application of a distortion-aware design is essential.…”

Section: A Contributionmentioning

confidence: 99%

“…Secondly, the SIC is purely done via transmit beamforming at the null space of the relay receive antennas, e.g., [25]- [30], hence imposing a zero interference power constraint for transmit beamforming design, i.e., P intf ≤ 0. Finally, as a generalization of the aforementioned extreme approaches, a combined transmit beamforming and analog/digital cancellation at the receiver is considered in [33], [34]. In the aforementioned case it is assumed that the received selfinterference power should not exceed a certain threshold (P th ), i.e., P intf ≤ P th .…”

Section: B Performance Comparisonmentioning

confidence: 99%

“…In all of the aforementioned cases, due to the perfect hardware assumptions, and upon imposition of the required self-interference power constraint, the SIC is assumed to be perfect. In our simulations, we evaluate the generalized approach in [33], [34] by once assuming a high self-interference power threshold, i.e., P th = P r,max , denoted as 'P th -High', and once assuming a low self-interference power threshold, i.e., P th = 0.01 × P r,max , denoted as 'P th -Low' 10 . Moreover, the proposed approach in [38] is evaluated as a suboptimal solution, where a power adjustment method is done at the relay, assuming a maximum ratio combining/transmission (MRC/MRT) 11 .…”

Section: B Performance Comparisonmentioning

confidence: 99%

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Hardware Impairments Aware Transceiver Design for Full-Duplex Amplify-and-Forward MIMO Relaying

Taghizadeh

Cırık

Mathar

2018

IEEE Trans. Wireless Commun.

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In this work we consider a full-duplex (FD) and amplify-and-forward (AF) relay with multiple antennas, where hardware impairments of the FD relay are taken into account. Due to the inter-dependency of the transmit relay power and the residual self-interference in an AF-FD relay, we observe a distortion loop that degrades the system performance when relay dynamic range is not high. In this regard, we analyze the relay function, and an optimization problem is formulated to maximize the signal to distortion-plus-noise ratio (SDNR) under relay and source transmit power constraints. Due to the problem complexity, we propose a gradient-projection-based (GP) algorithm to obtain an optimal solution. Moreover, a nonalternating sub-optimal solution is proposed by assuming a rank-1 relay amplification matrix, and separating the design of the relay process into multiple stages (MuStR1). The proposed MuStR1 method is then enhanced by introducing an alternating update over the optimization variables, denoted as AltMuStR1 algorithm. Numerical simulations show that compared to GP, the proposed (Alt)MuStR1 algorithms significantly reduce the required computational complexity at the expense of a slight performance degradation. Moreover, as the hardware impairments increase, or for a system with a high transmit power, the impact of applying a distortion-aware design is significant.

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“…Recently, effective methods for self-interference cancellation (SIC) are proposed [28]- [31], motivating further studies on wide range of related applications [32], [33]. It is shown in [34]- [44] that the application of FD capability improves the spectral efficiency of the pointto-point or multi-hop wireless communications, relying on an optimized resource allocation and power control. In particular, the utilization of the FD capability at wireless backhaul links is presented as a promising use case, due to the zero-mobility conditions and the utilization of directive antennas, hence showing a potential to reduce the cost of spectrum [32].…”

Section: Introductionmentioning

confidence: 99%

Environment-Aware Minimum-Cost Wireless Backhaul Network Planning With Full-Duplex Links

Taghizadeh

Sirvi

Narasimha

et al. 2019

IEEE Systems Journal

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In this work, we address the joint design of the wireless backhauling network topology as well as the frequency/power allocation on the wireless links, where nodes are capable of full-duplex (FD) operation. The proposed joint design enables the coexistence of multiple wireless links at the same channel, resulting in an enhanced spectral efficiency. Moreover, it enables the usage of FD capability when/where it is gainful. In this regard, a mixed-integer-linear-program (MILP) is proposed, aiming at a minimum cost design for the wireless backhaul network, considering the required rate demand at each base station. Moreover, a re-tunning algorithm is proposed which reacts to the slight changes in the network condition, e.g., channel attenuation or rate demand, by adjusting the transmit power at the wireless links. In this regard, a successive inner approximation (SIA)based design is proposed, where in each step a convex subproblem is solved. Numerical simulations show a reduction in the overall network cost via the utilization of the proposed designs, thanks to the coexistence of multiple wireless links on the same channel due to the FD capability.

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Transmit beamforming aided amplify-and-forward MIMO full-duplex relaying with limited dynamic range

Cited by 35 publications

References 42 publications

Performance Analysis of Full-Duplex Amplify-and-Forward Relay System with Hardware Impairments and Imperfect Self-Interference Cancellation

Performance Analysis of Full-Duplex Amplify-and-Forward Relay System with Hardware Impairments and Imperfect Self-Interference Cancellation

Hardware Impairments Aware Transceiver Design for Full-Duplex Amplify-and-Forward MIMO Relaying

Environment-Aware Minimum-Cost Wireless Backhaul Network Planning With Full-Duplex Links

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