Low-Complexity Joint CFO and Channel Estimation for RIS-aided OFDM Systems
Citation:
Jeong, S., Farhang, A., Perovic, N.S., Flanagan, M.F., Low-Complexity Joint CFO and Channel Estimation for RIS-aided OFDM Systems, IEEE Wireless Communications Letters, 2021Download Item:
Abstract:
Accurate channel estimation is essential for achieving the performance gains offered by reconfigurable intelligent surface (RIS)-aided wireless communications. A variety
of channel estimation methods have been proposed for such
systems; however, none of the existing methods takes into account
the effect of synchronization errors such as carrier frequency
offset (CFO). In general, CFO can significantly degrade the
channel estimation performance of orthogonal frequency division
multiplexing (OFDM) systems. Motivated by this, we investigate
the effect of CFO on channel estimation for RIS-aided OFDM
systems. Furthermore, we propose a joint CFO and channel
impulse response (CIR) estimation method for these systems.
Simulation results demonstrate the effectiveness of our proposed
method, and also demonstrate that the use of time-domain rather
than frequency-domain estimation in this context results in an
improvement in the mean-squared error (MSE) performance of
channel estimation as well as in a significantly lower overall
computational complexity.
Sponsor
Grant Number
Science Foundation Ireland (SFI)
19/FFP/7005
Author's Homepage:
http://people.tcd.ie/afarhangDescription:
PUBLISHED
Author: Farhang, Arman
Type of material:
Journal ArticleSeries/Report no:
IEEE Wireless Communications LettersAvailability:
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