Researchers achieve “world record” spectral efficiency with massive MIMO
Researchers at Bristol University and Lund University have demonstrated 128 antenna MIMO that has achieved very high spectral efficiencies, and could be significant for 5G radio interface design.
A press release from Bristol University claimed that it had achieved a spectral efficiency – expressed as bits per second per Hertz – of 1.59Gbit/s in a 20MHz channel. That represents a 12x improvement on current LTE cellular efficiencies, and is a “world record” according to the PR headline.
The research team were conducting research on parallel systems, using a prototyping platform from NI based on LabVIEW system design software and PXI hardware. Bristol’s set-up operates at a carrier frequency of 3.5GHz and supports simultaneous wireless connectivity to up to 12 single antenna clients. Each client shares a common 20MHz radio channel. Complex digital signal processing algorithms unravel the individual data streams in the space domain seen by the antenna array.
Ove Edfors, Professor of Radio Systems at Lund University says: “We see massive MIMO as the most promising 5G technology and we have pushed it forward together with partners in Bristol and in our EU project MAMMOET. It is a pleasure seeing those efforts materialise.”