Abstract
Adaptive beamforming (BF) is essential when mm-
wave bands are utilized for mobile communications, where it
is important that the channel experienced when BF is applied
is as similar as possible to the estimated channel. This work
investigates the similarity of the channel at different time-instants
using estimates of auto-correlation functions for the instanta-
neous channel coefficients, based on 21.5 GHz measurements
with a smartphone-like mock-up in different indoor corridor
scenarios, with and without a user holding the mock-up. The
correlation is found to be relatively independent of the location
and orientation, with a reduced correlation with a person present.
Further, BF is studied based on the 7-element handheld array
with a 8.8–24.6 dB gain found for the 1st amplitude percentile
obtained with ideal channel state information (CSI). Non-ideal
CSI typically reduces both the correlation and the BF gain.
wave bands are utilized for mobile communications, where it
is important that the channel experienced when BF is applied
is as similar as possible to the estimated channel. This work
investigates the similarity of the channel at different time-instants
using estimates of auto-correlation functions for the instanta-
neous channel coefficients, based on 21.5 GHz measurements
with a smartphone-like mock-up in different indoor corridor
scenarios, with and without a user holding the mock-up. The
correlation is found to be relatively independent of the location
and orientation, with a reduced correlation with a person present.
Further, BF is studied based on the 7-element handheld array
with a 8.8–24.6 dB gain found for the 1st amplitude percentile
obtained with ideal channel state information (CSI). Non-ideal
CSI typically reduces both the correlation and the BF gain.
| Original language | English |
|---|---|
| Title of host publication | 2022 16th European Conference on Antennas and Propagation (EuCAP) |
| Number of pages | 5 |
| Publisher | IEEE |
| Publication date | 2022 |
| Article number | 9768935 |
| ISBN (Print) | 9781665416047 |
| ISBN (Electronic) | 9788831299046 |
| DOIs | |
| Publication status | Published - 2022 |
| Event | 16th European Conference on Antennas and Propagation, EuCAP 2022 - Madrid, Spain Duration: 27 Mar 2022 → 1 Apr 2022 |
Conference
| Conference | 16th European Conference on Antennas and Propagation, EuCAP 2022 |
|---|---|
| Country/Territory | Spain |
| City | Madrid |
| Period | 27/03/2022 → 01/04/2022 |