Jul 2026· International Conference on Signal Processing and Communications· pp. 1-5· 0 citations· 13 references
Abstract
Efficient uplink processing in distributed massive multiple-input multiple-output (D-mMIMO) systems requires effective local combining to significantly mitigate inter-user interference. Recent zero-forcing (ZF) based combining schemes, such as partial full-pilot ZF (PFZF) and protected weak PFZF (PWPFZF), rely on heuristic threshold-based user grouping that may lead to inefficient utilization of spatial degrees of freedom across access points. To address this limitation, we propose an adaptive pilot-aware local combining scheme, generalized PFZF (G-PFZF), that dynamically allocates spatial degrees of freedom based on local channel conditions and replaces heuristic grouping with a decentralized pilot-level optimization framework. Numerical results demonstrate that the proposed G-PFZF scheme achieves significantly higher sum spectral efficiency compared to PFZF and PWPFZF.
A unified comparative analysis of three widely used spatially correlated centralized scattering channel models in a multi-cell massive MIMO system suggests that M-MMSE is preferable in strongly correlated environments, while lower-complexity schemes such as RZF provide a favorable trade-off in scenarios with milder spa...
Waleed A. Ali, M. M. Zayed· Wireless networks· 0 citations
In dense deployments, massive multi-user multiple-input multiple-output (MU-MIMO) base stations can acquire instantaneous channel state information (CSI) for only a limited subset of users per scheduling interval, restricting multiuser diversity. We therefore propose Digital Twin User pre-Screening (DiTUS), a digital-t...
Namhyun Kim, Mahmoud Saad Abouamer, Jeonghun Park et al.· 0 citations
This paper proposes a novel, scalable receiver scheme: the Quantization-Aware Partial MMSE (QA-P-MMSE) receiver, which significantly outperforms other scalable schemes, such as Maximum-Ratio (MR) and Partial-MMSE (P-MMSE), in terms of both average spectral efficiency and user fairness.
Lokesh Sadrani, R. Rajput· International Journal of Ele...· 0 citations
A novel null-space expansion scheme based on phase-only control to exploit the degrees of freedom of massive antenna elements even in analog beamformers is proposed and the impact of phase quantization error is evaluated to confirm the practical feasibility of the proposed scheme.
Yuta Tsunoda, Mitsuki Muroi, Yuki Sasaki et al.· Journal on Wireless Communic...· 0 citations
In this paper, we propose an fluid antenna (FA)-enhanced interference exploitation symbol-level precoding (SLP) for downlink multi-user multiple-input single-output (MU-MISO) systems, focusing on transmitter-side fluid antenna systems (Tx-FAS) that allow flexible spatial correlation effects while preserving user portab...
Guorui Wei, Ang Li, Xiao-Yan Hu et al.· IEEE Transactions on Communi...· 0 citations
Distributed multiple-input multiple-output (D-MIMO) is envisioned as a key deployment architecture for future wireless systems, offering improved coverage and robustness through spatial separation, and favorable geometry for localization and sensing. Its greatest potential for localization lies in joint coherent proces...
Benjamin J. B. Deutschmann, L. D'Angelo, Erik Leitinger et al.· 0 citations
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