Achievable Rates and Training Overheads for a Measured LOS Massive MIMO Channel

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title = "Achievable Rates and Training Overheads for a Measured LOS Massive MIMO Channel",
abstract = "This paper presents achievable uplink (UL) sum-rate predictions for a measured line-of-sight (LOS) massive multiple-input, multiple-output (MIMO) (MMIMO) scenario and illustrates the trade-off 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 whilst 25{\%} of the achievable zero-forcing (ZF) 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 an LTE-like physical layer could be as low as 2{\%} for a terminal speed of 90m/s.",
keywords = "Antennas, Coherence, Field Trials., Interference, LOS, Massive MIMO, Mobile communication, Mobility, OFDM, Signal to noise ratio, Testbed, Training",
author = "Paul Harris and Hasan, {Wael Boukley} and Liang Liu and Steffen Malkowsky and Mark Beach and Simon Armour and Fredrik Tufvesson and Ove Edfors",
year = "2018",
month = "8",
doi = "10.1109/LWC.2018.2799863",
language = "English",
volume = "7",
pages = "594--597",
journal = "IEEE Wireless Communications Letters",
issn = "2162-2345",
publisher = "IEEE - Institute of Electrical and Electronics Engineers Inc.",
number = "4",