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

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Achievable Rates and Training Overheads for a Measured LOS Massive MIMO Channel. / Harris, Paul; Hasan, Wael Boukley; Liu, Liang; Malkowsky, Steffen; Beach, Mark; Armour, Simon; Tufvesson, Fredrik; Edfors, Ove.

In: IEEE Wireless Communications Letters, Vol. 7, No. 4, 08.2018, p. 594-597.

Research output: Contribution to journalArticle

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TY - JOUR

T1 - Achievable Rates and Training Overheads for a Measured LOS Massive MIMO Channel

AU - Harris, Paul

AU - Hasan, Wael Boukley

AU - Liu, Liang

AU - Malkowsky, Steffen

AU - Beach, Mark

AU - Armour, Simon

AU - Tufvesson, Fredrik

AU - Edfors, Ove

PY - 2018/8

Y1 - 2018/8

N2 - 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.

AB - 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.

KW - Antennas

KW - Coherence

KW - Field Trials.

KW - Interference

KW - LOS

KW - Massive MIMO

KW - Mobile communication

KW - Mobility

KW - OFDM

KW - Signal to noise ratio

KW - Testbed

KW - Training

U2 - 10.1109/LWC.2018.2799863

DO - 10.1109/LWC.2018.2799863

M3 - Article

VL - 7

SP - 594

EP - 597

JO - IEEE Wireless Communications Letters

JF - IEEE Wireless Communications Letters

SN - 2162-2345

IS - 4

ER -