Sep 2026· IEEE International Symposium on Personal, Indoor and Mobile Radio Communications· pp. 1-6· 0 citations· 15 references
Abstract
Multiple-input multiple-output (MIMO) precoding with non-constant modulus codebooks inherently induces perantenna local power constraints (LPCs). However, current Third Generation Partnership Project (3GPP) specifications suggest that channel state information (CSI) at the user equipment (UE) is computed under a global power constraint (GPC), without accounting for per-antenna power amplifier (PA) limitations. This mismatch can lead to infeasible transmission strategies, typically addressed through transmit power back-off or PA overdimensioning, at the expense of spectral efficiency or increased cost, respectively. In this paper, we propose a low-overhead signaling mechanism that enables power-matched CSI reporting. Link-level simulations under 3GPP-compliant assumptions show that the proposed approach mitigates performance degradation while reducing the need for PA over-dimensioning.
Increasing power consumption of extremely largescale antenna arrays in multiple-input multiple-output (MIMO) deployments motivates antenna-port adaptation for network energy saving (NES), where the next-generation NodeB (gNB) switches among multiple antenna-port sub-configurations (subcfgs) to match traffic variations...
Fan Wang, Xiao-Lin Hou, Xiang Li et al.· IEEE International Symposium...· 0 citations
Accurate channel state information (CSI) acquisition is essential for multiple-input multiple-output (MIMO) systems. The Third Generation Partnership Project (3GPP) specifies a limited feedback framework in which the user equipment reports CSI to the base station. In medium-to-high mobility scenarios, CSI becomes outda...
Lynda Berrah, Raphael Visoz, D. Le Ruyet· IEEE International Symposium...· 0 citations
This letter investigates power allocation strategies for multiple-input multiple-output (MIMO) systems under joint sum-power and per-antenna power constraints in the case of rank-deficient channels. Starting from the generic problem, we introduce an auxiliary approach based on a fixed precoder structure, devising a low...
David Demmer, M. Merluzzi, Jean-Baptiste Doré et al.· IEEE Wireless Communications...· 0 citations
This letter addresses the challenges of spectrum scarcity and co-channel interference in visible light communication (VLC) multiple-input multiple-output (MIMO) systems by introducing over-the-air computation (AirComp) technology. Under VLC-specific transmission constraints, the precoding matrices, aggregation matrix,...
Li-Ping Luo, Juan Ma, Han Xu et al.· IEEE Wireless Communications...· 0 citations
High-frequency and broadband line-of-sight multiple-input multiple-output (LoS-MIMO) is a key solution for massive space-to-Earth data downlinks. However, in low Earth orbit (LEO) scenarios, it faces spatial rank deficiency from time-frequency coupling correlation and clock deviations from distributed oscillators. This...
Pei-Xin Zhang, Feng-Kui Gong, Guo Li et al.· 0 citations
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