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Paul Harris*, Wael Boukley Hasan, Liang Liu, Steffen Malkowsky, Mark Beach, Simon Armour, Fredrik Tufvesson, Ove Edfors
Research output: Contribution to journal › Article (Academic Journal) › peer-review
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 |
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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 | |
Publication status | Published - Aug 2018 |
Research output: Contribution to journal › Article (Academic Journal) › peer-review
Person: Academic , Member