Zheao Li, Jiancheng An
This paper proposes an advanced realization principle for wideband multiuser multiple-input multiple-output orthogonal frequency-division multiplexing (MU-MIMO OFDM) transmitters, where the conventional transmitter-side baseband chain is physically synthesized in the wave domain. For design and optimization purposes, this fully wave-domain wideband MU-MIMO OFDM transmitter implemented by a cascaded SIM structure is functionally partitioned into two cascaded SIM blocks. The first block, denoted as SIM 1, integrates symbol loading and channel-adaptive MU-MIMO precoding updated at the channel-coherence timescale, mapping the user streams to a virtual port-subcarrier representation. The second block, denoted as SIM 2, acts as an offline-configured sampling-rate modulator that materializes the inverse discrete Fourier transform (IDFT) and cyclic prefix (CP) insertion directly in the wave domain. This baseband-free architecture establishes a virtual-to-physical transition from information bits to radiated CP-extended OFDM waveforms. Results demonstrate the convergence, architecture trade-off, wave-domain OFDM materialization accuracy, and competitive performance of the proposed baseband-free transmitter.
@article{d6fe4129-2d1c-4309-b56d-639038f6c603,
title={2026 Li Wideband MU MIMO OFDM Metasurface Transmitter},
author={Zheao Li and Jiancheng An},
year={2026},
language={en}
}TY - JOUR TI - 2026 Li Wideband MU MIMO OFDM Metasurface Transmitter AU - Zheao Li AU - Jiancheng An PY - 2026 LA - en ER -
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