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Publication - Professor Mark Beach

    Achievable rates and training overheads for a measured LOS massive MIMO channel


    Harris, P, Hasan, WB, Liu, L, Malkowsky, S, Beach, M, Armour, S, Tufvesson, F & Edfors, O, 2018, ‘Achievable rates and training overheads for a measured LOS massive MIMO channel’. IEEE Wireless Communications Letters, vol 7., pp. 594-597


    This letter presents achievable uplink sum-rate predictions for a measured line-of-sight (LOS) massive multiple-input multiple-output (MMIMO) scenario and illustrates the tradeoff between spatial multiplexing performance and channel de-coherence rate for an increasing number of base station (BS) antennas. In addition, an orthogonal frequency division multiplexing (OFDM) case study is formed which considers the 90% coherence time to evaluate the impact of MMIMO channel training overheads in high-speed LOS scenarios. It is shown that while 25% of the achievable zero-forcing sum-rate is lost when the resounding interval is increased by a factor of 4, the OFDM training overheads for a 100-antenna MMIMO BS using a long-term evolution-like physical layer could be as low as 2% for a terminal speed of 90 m/s.

    Full details in the University publications repository