Page 55 - SAMENA Trends - Gitex Special 2023

TECHNOLOGY UPDATES SAMENA TRENDS

Telekom Deutschland Achieves ‘World Record’ 12Gbps Speed by Aggregating

3.6GHz, 6GHz Bands

Telekom Deutschland has set what it
claims is a ‘new world record’ by achieving
download speeds of 12Gbps in a trial in
Alzey, Rheinhessen. The test aggregated
commercial 3.6GHz 5G spectrum with
a 400MHz block of unlicensed 6GHz
spectrum, with the peak download speed
measured at a distance of 100 meters.
The 6GHz band alone was capable of
supporting speeds of 11Gbps, Telekom
noted. Abdu Mudesir, Head of Technology
at Telekom Deutschland, commented:
‘6GHz spectrum has the characteristic
to meet the growing demand of our
customers for more capacity and more
speed. That is why we hope that the World the direction for mobile radio use.’ Telekom November 2022 in Bonn.
Radiocommunication Conference will set began testing 6GHz 5G frequencies in

Near-Field Wideband Channel Estimation for Extremely Large-Scale MIMO

Extremely large-scale multiple-input-multiple-output (XL-MIMO) at Mingyao Cui (first author) and Prof. Linglong Dai (corresponding
millimeter-wave (mmWave) and terahertz (THz) bands plays an author) from Tsinghua University, China. In this article, a bilinear
important role in 6G networks for its extreme high beamforming pattern detection (BPD) based approach was proposed to accurately
gain and abundant spectrum resources. To unleash the superiority recover the high-frequency XL-MIMO channel. First, the bilinear
of XL-MIMO, accurate channel estimation is of great importance to pattern of the near-field beam split effect is revealed, which implies
perform efficient precoding. Unfortunately, as opposed to classical that the sparse support set of near-field channels in both the angle
5G massive MIMO, channel estimation for high-frequency XL- and distance domains can be regarded as a linear function against
MIMO in 6G faces a serious challenge of "near-field beam split." To frequency. Then, this bilinear pattern is used to estimate the angle-
elaborate, high-frequency XL-MIMO brings the qualitative paradigm of-arrival (AoA) and distance parameters of each near-field path
shift from conventional far-field planar-wave communications to component via a modified simultaneously orthogonal matching
its near-field spherical-wave counterpart. In addition, the ultra- pursuit algorithm. Finally, simulation results demonstrated their
large bandwidth at mmWave and THz make the electromagnetic scheme is capable of achieving high channel estimation accuracy
wavefront of different frequency components differ from each in all far-field/near-field/narrowband/wideband conditions. This
other, leading to the undesired beam split effect. The coupling of paper provides a solution to channel estimation in the presence
near-field and beam split effects gives rise to a complex structure of near-field beam split. It is expected that the bilinear pattern
of wireless channels, whose estimation is intractable for existing could be extended to various near-field wideband communication
methods. New research, titled "Near-Field Wideband Channel scenarios for addressing near-field beam split issues, such as
Estimation for Extremely Large-Scale MIMO," was published in reconfigurable intelligent surface communications and cell-free
Science China Information Sciences. It is co-authored by Mr. massive MIMO communications.

EE Confirmed to Have Carried Out First VoNR Call

EE, the mobile subsidiary of BT Group, is confirmed to have carried stated that EE has now moved ‘the vast majority’ of its mobile
out what is claimed to be the UK’s first call using voice-over-New subscriptions on to its new 5G-ready network core. In parallel, it
Radio (VoNR) technology. The development was revealed in a was reported that EE has continued to upgrade ‘many’ of its key
press release issued by BT Group regarding EE’s progress towards radio sites across the country, while it has also begun issuing 5G
5G Standalone (5G SA) technology, in which the company also SA-capable SIMs to end users.

55 GITEX SPECIAL 2023