I have worked in the field, so I may be able to answer some questions. As always, real-world speed will no be this high any time soon. This is a lab demo which

I have worked in the field, so I may be able to answer some questions. As always, real-world speed will no be this high any time soon. This is a lab demo which is very different from reality. They do specify the techniques they used: * Five-carrier aggregation: Each LTE carrier uses up to 20 MHz, so this uses 100 MHz of bandwidth dedicated to a single user. Bandwidth in the air is scarce and many carriers do not have that much in total. LTE is expanding into higher frequencies (towards 5GHz) where there is more BW available, but the range is shorter. * 256 QAM: This requires very good receivers and extremely low background noise and interference. * 4x4 MIMO: MIMO is quite magic and unpredictable, even more so than radio signal propagation in general. For 4x4 to work the phone needs to have four separate antennas, and they need to be separated enough to receive different combinations of signals from the four transmitter antennas. 2x2 MIMO is common and works if you are close enough to the base station and get lucky with the angles and signal reflections.