Long-term beamforming projection matrices can be optimally computed via matrix inverse square root to maximize capacity bounds, yielding near-instantaneous MMSE performance with far lower overhead in rural uplink ray-tracing simulations.
Beamspace channel estimation for massive mimo mmwave systems: Algorithm and vlsi design,
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Scalable Long-Term Beamforming for Massive Multi-User MIMO
Long-term beamforming projection matrices can be optimally computed via matrix inverse square root to maximize capacity bounds, yielding near-instantaneous MMSE performance with far lower overhead in rural uplink ray-tracing simulations.