Robust Sum-GDoF of Symmetric 2 × 2 × 2 Weak Interference Channel With Heterogeneous Hops

Wang, Junge; Jafar, Syed A.

doi:10.1109/jsac.2023.3240780

Cited by 3 publications

(1 citation statement)

References 27 publications

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“…In real environments, however, the channel elements are not only erroneous due to inaccurate channel estimation or quantization of estimated CSI [10,11], but are also correlated due to little scattering and insufficient antenna spacing, e.g., the 3GPP spatial channel model (SCM). In this case, the performance of the works [4][5][6] is severely sensitive to both CSI errors and channel correlation.…”

Section: Motivationsmentioning

confidence: 99%

Robust Transceiver Design for Correlated MIMO Interference Channels in the Presence of CSI Errors under General Power Constraints

Kang,

Lim

2024

Mathematics

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In this paper, we consider a new design problem of optimizing a linear transceiver for correlated multiple-input multiple-output (MIMO) interference channels in the presence of channel state information (CSI) errors, which is a more realistic and practical scenario than those considered in the previous studies on uncorrelated MIMO interference channels. By taking CSI errors into account, the optimization problem is initially formulated to minimize the average mean square error (MSE) under the general power constraints. Since the objective function is not jointly convex in precoders and receive filters, we split the original problem into two convex subproblems, and then linear precoders and receive filters are obtained by solving two subproblems iteratively. It is shown that the proposed algorithm is guaranteed to converge to a local minimum. The numerical results show that the proposed algorithm can significantly reduce the sensitivity to CSI errors compared with the existing robust schemes in the correlated MIMO interference channel.

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Section: Motivationsmentioning

confidence: 99%

Robust Transceiver Design for Correlated MIMO Interference Channels in the Presence of CSI Errors under General Power Constraints

Kang,

Lim

2024

Mathematics

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A novel unified interference management scheme for multicellular MIMO communication with instantaneous relay

Menon U,

Selvaprabhu

2024

Int J Communication

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SummaryIn the world of emerging wireless networks, interference poses a significant challenge to reliable wireless communication. Additionally, these networks are prone to path loss and blockages, which can be addressed by utilizing the advanced technology of multihop communication with instantaneous relay (IR). However, scenarios involving IR‐assisted networks are considered instances of multihop communications that face potential obstacles caused by interference. As a result, multiple interference management approaches exist to tackle this interference issue, among which aligned interference neutralization (AIN) is a state‐of‐the‐art technology that seamlessly unifies two established interference management strategies: interference alignment (IA) and interference neutralization (IN). Therefore, this paper presents a novel tristaged AIN scheme to mitigate interference in a multicellular multiple‐input multiple‐output (MIMO) interference multiple access channel (IMAC). In the proposed scheme, the initial stage‐1 involves transmitting message signals from individual transmitters or users to the IR and the receiving base stations (BSs). In stage‐2, the IR neutralizes half of the interference signals by performing IN. Finally, in stage‐3, IA is carried out at the receiver BS terminals, aligning the remaining interference signals equally within the available dimensions. Based on this proposed approach, we determined that for an IR‐aided multicellular MIMO IMAC, the achievable degree of freedom (DoF) is 2N. The proposed approach's robustness and effectiveness have been analyzed through extensive simulations, and these simulation results indicated that the proposed approach outperforms other benchmark interference management techniques in terms of DoF and sum rate, thereby improving user performance.

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Joint Terminal-UAV Association and Power Allocation for Hybrid Satellite-UAV Relay Network With Rate Splitting Multiple Access

Wang,

Chen,

2024

IEEE Access

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Robust Sum-GDoF of Symmetric 2 × 2 × 2 Weak Interference Channel With Heterogeneous Hops

Cited by 3 publications

References 27 publications

Robust Transceiver Design for Correlated MIMO Interference Channels in the Presence of CSI Errors under General Power Constraints

Robust Transceiver Design for Correlated MIMO Interference Channels in the Presence of CSI Errors under General Power Constraints

A novel unified interference management scheme for multicellular MIMO communication with instantaneous relay

Joint Terminal-UAV Association and Power Allocation for Hybrid Satellite-UAV Relay Network With Rate Splitting Multiple Access

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