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arXiv · 2503.04935

Eliminating Phase Misalignments in Cell-Free Massive MIMO via Differential Transmission

Marx M. M. Freitas·Stefano Buzzi·Giovanni Interdonato
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Abstract

This paper proposes two approaches for overcoming access points' phase misalignment effects in the downlink of cell-free massive MIMO (CF-mMIMO) systems. The first approach is based on the differential space-time block coding technique, while the second one is based on the use of differential modulation schemes. Both approaches are shown to perform exceptionally well and to restore system performance in CF-mMIMO systems where phase alignment at the access points for downlink joint coherent transmission cannot be achieved.

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Marx M. M. Freitas, Stefano Buzzi, Giovanni Interdonato. 2025-03-06. Eliminating Phase Misalignments in Cell-Free Massive MIMO via Differential Transmission. https://arxiv.org/abs/2503.04935

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