Retrospective Interference Regeneration Schemes for Relay-Aided K-user MIMO Broadcast Networks

Li, Jin-Fu; Xiong, Zehui; Wang, Feng; Jiang, Weiheng; Niyato, Dusit

doi:10.1109/icc45855.2022.9839151

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…These practical constraints in obtaining the perfect CSIT were overcome at first in [3] by introducing the novel concept of retrospective interference alignment (RIA). Thus, RIA points to a linear precoding approach that utilizes only the delayed CSIT [4]. Also, it is observed that closely associated with the RIA scheme, the then-existing IA schemes such as space-time interference alignment with moderately delayed CSIT [5], [6], blind IA with no knowledge of CSIT [7], [8] aid in imparting novel insight into the interplay between the delay in channel state information (CSI) feedback and the performance of the system in terms of sum degrees of freedom (DoF) gain.…”

Section: Introductionmentioning

confidence: 99%

“…For the downlink MIMO networks with a varied number of users, the authors in [14] proposed three unique and novel joint IA strategies. They are hybrid antenna array-based partial interference elimination and RIR scheme; hybrid antenna array-based improved partial interference elimination and RIR schemes; hybrid antenna array-based cyclic interference elimination and RIR scheme.…”

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confidence: 99%

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A Novel Tri-Staged RIA Scheme for Cooperative Cell Edge Users in a Multi-Cellular MIMO IMAC

Selvaprabhu

2022

IEEE Access

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In the real world of wireless communication systems, one solution to the practical limitation of interference alignment in terms of global channel state information at the transmitter (CSIT) requirement is to consider a linear precoding approach that only uses delayed CSIT known as retrospective interference alignment (RIA). Therefore, in the proposed work, a novel RIA scheme for the cooperative cell edge (CE) users that are more vulnerable to inter-cell interference in a multi-cellular multiple-input multiple-output (MIMO) interference multiple access channels (IMAC) is presented. The core idea of the proposed RIA is characterized by interference refining at the end of the first two stages and interference redirecting at the third stage. The initial stage 1 involves feeding the base station (BS) in cell-1 with the data streams from the cooperative CE users. During stage 2, the BS in cell-2 is fed with data streams from the cooperative CE users in cell-2. In the final stage 3, the overheard equation redirecting is performed. Based on the proposed method, we showed that for a three CE user cooperative multi-cellular MIMO IMAC channel, the achievable degrees of freedom (DoF) is 24 7 and later extended to a general L CE user cooperative multi-cellular MIMO IMAC channel and obtained the desired DoF as 2L(L+1) 2L+1 . The simulation result shows that in comparison with the other benchmark schemes considered, the proposed scheme provides a greater DoF and thereby enhances the performance of cooperative CE users.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

A Novel Tri-Staged RIA Scheme for Cooperative Cell Edge Users in a Multi-Cellular MIMO IMAC

Selvaprabhu

2022

IEEE Access

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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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Retrospective Interference Regeneration Schemes for Relay-Aided K-user MIMO Broadcast Networks

Cited by 2 publications

References 14 publications

A Novel Tri-Staged RIA Scheme for Cooperative Cell Edge Users in a Multi-Cellular MIMO IMAC

A Novel Tri-Staged RIA Scheme for Cooperative Cell Edge Users in a Multi-Cellular MIMO IMAC

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

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