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

Research output: Contribution to journalArticle

Original languageEnglish
Article number8274927
Pages (from-to)594-597
Number of pages4
JournalIEEE Wireless Communications Letters
Volume7
Issue number4
Early online date30 Jan 2018
DOIs
DateAccepted/In press - 25 Jan 2018
DateE-pub ahead of print - 30 Jan 2018
DatePublished (current) - Aug 2018

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.

    Research areas

  • field trials, LOS, Massive MIMO, mobility, testbed

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  • Full-text PDF (accepted author manuscript)

    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via IEEE at http://ieeexplore.ieee.org/document/8274927/references . Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 746 KB, PDF document

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