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

Paul Harris; Wael Boukley Hasan; Liang Liu; Steffen Malkowsky; Mark Beach; Simon Armour; Fredrik Tufvesson; Ove Edfors

doi:10.1109/LWC.2018.2799863

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

Paul Harris^*
, Wael Boukley Hasan
, Liang Liu
, Steffen Malkowsky
, Mark Beach
, Simon Armour
, Fredrik Tufvesson
, Ove Edfors

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

7 Citations (Scopus)

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Abstract

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.

Original language	English
Article number	8274927
Pages (from-to)	594-597
Number of pages	4
Journal	IEEE Wireless Communications Letters
Volume	7
Issue number	4
Early online date	30 Jan 2018
DOIs	https://doi.org/10.1109/LWC.2018.2799863
Publication status	Published - Aug 2018

Keywords

field trials
LOS
Massive MIMO
mobility
testbed

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10.1109/LWC.2018.2799863

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title = "Achievable rates and training overheads for a measured LOS massive MIMO channel",

abstract = "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.",

keywords = "field trials, LOS, Massive MIMO, mobility, testbed",

author = "Paul Harris and \{Boukley Hasan\}, Wael and Liang Liu and Steffen Malkowsky and Mark Beach and Simon Armour and Fredrik Tufvesson and Ove Edfors",

year = "2018",

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doi = "10.1109/LWC.2018.2799863",

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AU - Harris, Paul

AU - Boukley Hasan, Wael

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 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.

AB - 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.

KW - field trials

KW - LOS

KW - Massive MIMO

KW - mobility

KW - testbed

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DO - 10.1109/LWC.2018.2799863

M3 - Article (Academic Journal)

AN - SCOPUS:85041411280

SN - 2162-2337

VL - 7

SP - 594

EP - 597

JO - IEEE Wireless Communications Letters

JF - IEEE Wireless Communications Letters

IS - 4

M1 - 8274927

ER -

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

Abstract

Keywords

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Performance characterization of a real-time massive MIMO system with LOS mobile channels

Dr Simon M D Armour

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

Abstract

Keywords

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Research output

Performance characterization of a real-time massive MIMO system with LOS mobile channels

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Dr Simon M D Armour

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