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September 30, 2025Open Access

Joint Spatial and Spectral Hybrid Precoding for Multi-User MIMO-OFDM Systems

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This work demonstrates a robust digital-RF precoding method for maximizing downlink sum-rate, addressing PAPR and OOB emissions in mmWave systems.

The proposed optimization method improves sum-rate performance in multi-user MIMO-OFDM systems.
A weighted minimum mean squared error method iteratively enhances digital-RF precoding under various constraints.
Extensive simulations reveal superiority over traditional benchmarks in addressing phase errors and cost.
Challenges like peak-to-average power ratio and out-of-band emissions are effectively managed with hybrid precoding.

Reyhanian et al. (2025) studied this question.

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This work demonstrates a robust digital-RF precoding method for maximizing downlink sum-rate, addressing PAPR and OOB emissions in mmWave systems.