Much wireless communication research in the past five years has been motivated by 6G needing the results. The 6G standardization has recently begun, so in the coming years, we will see which “6G candidate technologies” will be utilized and which will not. Research papers often focus on revolutionary new features, while technology development is often evolutionary since the demand for new features comes gradually.
Although we have yet to determine what technology components will be used, there is much certainty around things like standardization timelines, new feature categories, spectrum candidates, performance metrics, and the interplay between different stakeholders. I explain this in a new 18-minute video about 6G, where I answer what 6G truly is, why it is needed, and how it is developed.
Hi, thanks for your reply in advance I was hoping if you have time you could help explain how 6G will provide 50 bps/Hz of spectral efficiency. As from what I understand with 5G spectral efficiency per CPE is 10 bps/Hz, which translates to rougly 1024-QAM. How would 2^50 QAM be achieved on a CPE? The 50 bps/Hz is from this article https://www.lightreading.com/6g/an-early-look-at-what-6g-might-look-like-in-the-us https://www.5gamericas.org/wp-content/uploads/2024/10/The-6G-Upgrade-in-the-7-8-GHz-Spectrum-Id.pdf
You are right that we cannot expect to achieve more than 10 bps/Hz in the data transmission, but that only applies to a single spatial layer/stream. If we 5 simultaneous layers, the total value becomes 50 bps/Hz. This why MIMO is essential to achieve high spectral efficiencies.
Here is an example from 5G: http://ma-mimo.ellintech.se/2020/10/02/reciprocity-based-massive-mimo-in-action/
A peak rate of 5.45 Gbps was achieved over 100 MHz, which corresponds to 54.5 bps/Hz. It was achieved by transmitting 16 spatial layers, each having a modest spectral efficiency of 3.4 (16-QAM with channel coding).