Optical fronthaul of LTE-advanced MIMO by spatial multiplexing in multicore fiber optical wireless fronthaul of dual Mx2×2 MIMO LTE-A systems by radio-over-fiber spatial multiplexing is demonstrated over 125m 4-core fiber using 16QAM and 64QAM subcarrier mapping. 3GPP LTEMIMO algorithms in-place successfully mitigate core-to-core impairments.