Qualcomm is working hard on its 5G modem, the Snapdragon X50 chip. It is he who will find himself in the first smartphones and routers that will support the new technology. However, 5G has many faces. One of them is the millimetre band (i.e. mmWave). A few days ago we saw a recording in which Qualcomm showed a prototype of a device with a working 5G modem in the 28 GHz band. This is the first device of this type, which does not resemble a small refrigerator with its dimensions. The current data transmission speed is up to 4.3 Gbps.
Snapdragon X50 modem was announced in October 2016. Since then, Qualcomm has worked both on miniaturization and the implementation of technologies that were to be used in 5G networks. The problem was that it was not until the end of last year that work on the 5G NR standard was completed. Many people have doubts that the millimetre band will be implemented also in smartphones. However, Sherif Hanna, director of the marketing department at Qualcomm, directly said that in a few months another prototype will be developed, which will look like smartphones with its appearance and size. However, in the first half of 2019, the first commercial devices should appear.
Qualcomm shows that 5G is fast, but it is not the most important
The recording shows a 5G device with a mmWave modem, which is located in a shielded box, where 6 pyramidal horn antennas are installed. Unfortunately, we do not know the connection diagram and transmission parameters, such as the MIMO mode and the modulation scheme. Qualcomm only boasted a rate of 4.3 Gbps and carrier aggregation of 8 frequency blocks, each 100 MHz. The construction of a device that transmits data in the 800 MHz bandwidth is impressive. However, the bandwidth utilization of such a solution is only 5.375 bps/Hz (i.e. 107.5 Mbps in a 20 MHz block). The first LTE devices achieved a similar result. However, this is not the most important thing in the upcoming 5G networks. The large capacity of networks operating in the 28 GHz mWave band will be ensured not only by means of a wide band, but also by using multiple antennas and Massive MIMO technology. In practice, this means that the 5G base station will be able to simultaneously support several devices that will transmit 4-5 Gbps data stream each.
Source: RCR Wireless