5G and Beyond: On the Significance of Wireless Channel Estimation

Jasneet Kaur, M. Arif Khan

Research output: Book chapter/Published conference paperConference paperpeer-review

Abstract

Wireless channel is one of the most important
components of any wireless communication system. Accurate
wireless channel knowledge at the transmitter ensures that
correct amount of data is being transmitted to the intended
users/devices in the system. This wireless channel knowledge,
known as Channel State Information (CSI), is acquired at the
transmitter through the feedback sent by the users/devices. The
transmitter, then, uses this CSI to adjust the transmission, both
in terms of data rate and direction, to the intended users/devices.
In this paper, we investigated why accurate Wireless Channel Estimation
(WCE) is even more critical for contemporary wireless
technologies such as 5G and beyond? We first modelled the wireless
channel between a transmitter and multiple receivers having
multiple antennas using independent and identically distributed
Gaussian random processes and calculated channel strengths and
angle of transmission using ground as our azimuth reference. We
then used a Simple Random Estimation (SRE) technique at the
transmitter to estimate the same wireless channel. Our numerical
results show that a small perturbation in WCE leads to significant
deviations in channel strengths and directions. These estimation
errors at the transmitter result in data loss as well as poor Quality
of Service (QoS) to the users/devices. This study leads us to
develop innovative wireless channel estimation techniques using
Machine Learning (ML) at the transmitter that will reduce the
amount of CSI feedback and improves the over all transmission
in terms of both channel strengths and direction of transmission
in our future work. Please note: given the purpose of this paper
is to discuss channel estimation but in this paper we are not using
specific baseline channel estimation techniques. Our main purpose
is to show the channel error using SRE and future need to minimise
this channel error.
Original languageEnglish
Title of host publicationIEEE SoutheastCon 2024
PublisherIEEE Xplore
Pages28-33
Number of pages6
Publication statusAccepted/In press - 24 Mar 2024

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