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

Research output: Contribution to journalArticle

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.

Details

Authors
Organisations
External organisations
  • University of Bristol
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Telecommunications

Keywords

  • Antennas, Coherence, Field Trials., Interference, LOS, Massive MIMO, Mobile communication, Mobility, OFDM, Signal to noise ratio, Testbed, Training
Original languageEnglish
Pages (from-to)594-597
JournalIEEE Wireless Communications Letters
Volume7
Issue number4
Early online date2018 Jan 29
Publication statusPublished - 2018 Aug
Publication categoryResearch
Peer-reviewedYes