Average Rate Maximization for Multiuser MISO-OFDM System With Movable Antennas

2026-02-17

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Haolan Zheng

伍沛然 (Peiran Wu)

Minghua Xia

DOI：10.1109/tvt.2026.3665577

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Movable antennas (MAs) have recently emerged as a promising technique to exploit additional spatial degrees of freedom by dynamically adjusting antenna positions. While prior works primarily focus on narrowband or single-user settings, their applicability to wideband multiuser systems remains largely unexplored. In this paper, we address the fundamental problem of average rate maximization in a downlink multiuser MISO-OFDM system aided by MAs at both the base station and user sides. The core challenge lies in the joint optimization of beamforming vectors across multiple subcarriers and the transmit/receive antenna positions under frequency-selective fading and multiuser interference. To tackle this highly non-convex problem, we develop an efficient alternating optimization framework that integrates successive convex approximation for beamforming and projected gradient ascent for antenna positioning. Simulation results demonstrate that the proposed MA-aided design significantly outperforms conventional fixed-position schemes, highlighting the potential of MAs in wideband multiuser wireless networks.

Keywords:

Movable antennas

multiple-input single-output

multiuser interference

orthogonal frequency division multiplexing

antennas’ positions optimization

Average Rate Maximization for Multiuser MISO-OFDM System With Movable Antennas

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