Performance Evaluation of Movable Antenna Arrays in Wideband Multi-User MIMO Systems
Amna Irshad, Emil Bj\"ornson, Alva Kosasih, and Vitaly Petrov

TL;DR
This paper evaluates the practical performance of movable antenna arrays in wideband multi-user MIMO systems, considering hardware impairments and various deployment scenarios, revealing benefits are scenario-dependent and diminish under impairments.
Contribution
It provides a comprehensive analysis of movable antenna arrays in realistic wideband multi-user MIMO settings, including new sum-rate expressions and impairment modeling.
Findings
Movable antennas offer gains in low-impairment, interference-rich environments.
Performance benefits decrease with hardware impairments and rich scattering.
Scenario conditions critically influence the effectiveness of movable antenna deployment.
Abstract
Future wireless networks are expected to support increasingly high data rates and user densities, motivating advanced multi-antenna architectures capable of adapting to dynamic propagation environments. Movable antenna (MA) arrays have recently emerged as an extension of massive MIMO, enabling physical repositioning of antenna elements to better exploit spatial diversity and mitigate inter-user interference. While prior studies report promising gains under idealized assumptions, their performance under realistic wideband multi-user operation remains insufficiently understood. This paper presents a comprehensive evaluation of MA-enabled systems in practical uplink and downlink scenarios. A wideband OFDM system model is developed, and novel closed-form sum-rate expressions are derived for both uplink and downlink under linear and nonlinear processing. Hardware impairments are incorporated…
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Taxonomy
TopicsAdvanced MIMO Systems Optimization · Antenna Design and Analysis · Direction-of-Arrival Estimation Techniques
