The race of ultra-fast smartphones lasts at best. And it is not about super CPUs to run the most demanding mobile games. Manufacturers are getting faster and faster LTE-Advanced modems that already can achieve higher throughput that the fiber Internet connection. Next year’s flagship smartphones from Samsung will support aggregation of up to 6 LTE carriers, which translates into a stunning 1.2 Gbps speed. Who would need such a fast Internet on the phone?
This is a very good question. However, we did them on the occasion of the first smartphones offering 1 Gbps mobile Internet. The truth is that there is probably no operator in the world that would have the band required to achieve such speed. But year after year, operators are upgrading their LTE-Advanced networks, so smartphones have to keep up with the new base station capabilities. The category 16 LTE modem achieves 1 Gbps by using the following techniques:
- 4×4 MIMO,
- 256 QAM modulation,
- Carrier Aggregation of 4 or 5 bands.
The new Samsung Exynos 8895 will allow you to aggregate up to 6 bands.
This will be the first chip in the world that is able to download data simultaneously via 6 bands at once. The Qualcomm Snapdragon X20 modem has the same category, but it will aggregate “only” 5 bands. However, both systems will support 1.2 Gbps. How is this possible? Everything relies on the amount of data streams that the modem can handle. Qualcomm is limited to aggregation of 5 bands, but one of them must be 4×4 MIMO. With the Samsung solution, the base station can work in a normal 2×2 MIMO mode on all 6 carriers. As you have probably already figured out, the 2×2 MIMO cell transmits 2 data streams and 4×4 MIMO cell have 4 streams respectively. To achieve a total 1.2 Gbps throughput, each stream must have a bit rate of 100 Mbps. This is possible if the operator has a 20 MHz cell in each band and uses 256 QAM modulation.
Samsung has announced that the new category 16 LTE-Advanced modem will enter the production phase by the end of this year. So we can expect it to be in next year’s Samsung Galaxy S9 and S9 + mobiles.