SC-FDMA as a Delay-Doppler Domain Modulation Technique
Citation:
Farhang A., Bayat M., SC-FDMA as a Delay-Doppler Domain Modulation Technique, IEEE International Conference on Communications Workshops (ICC Workshops), Denver, CO, USA, 09-13 June 2024, 2024, 69 - 74, 69-74Download Item:
Abstract:
This paper compares orthogonal time frequency
space (OTFS) modulation and single-carrier frequency division
multiple access (SC-FDMA). It shows that these are equivalent
except for a set of linear phase shifts, applied to the transmit/receive data symbols, which can be absorbed into the channel.
Through mathematical and numerical analysis, it is confirmed
that SC-FDMA is in fact a delay-Doppler domain multiplexing
technique that can achieve the same performance gains as those of
OTFS in time-varying wireless environments. This is a promising
result as SC-FDMA is already a part of the current wireless
standards. The derivations in this paper also shed light on
the time-frequency resources used by the delay-Doppler domain
data symbols with the fine granularity of delay and Doppler
spacings. While comparing the detection performance of the
two waveforms, a timing offset (TO) estimation technique with
orders of magnitude higher accuracy than the existing solutions
in the literature is proposed. From multiple access viewpoint,
the underlying tile structures in the time-frequency domain for
OTFS and SC-FDMA are discussed. Finally, multiuser input-output relationships for both waveforms in the uplink are derived.
Sponsor
Grant Number
Science Foundation Ireland (SFI)
SFI/21/US/3757
Science Foundation Ireland (SFI)
19/FFP/7005(T)
Author's Homepage:
http://people.tcd.ie/afarhang
Author: Farhang, Arman
Sponsor:
Science Foundation Ireland (SFI)Science Foundation Ireland (SFI)
Other Titles:
IEEE International Conference on Communications Workshops (ICC Workshops)Type of material:
Conference PaperAvailability:
Full text availableSubject (TCD):
Telecommunications , Signal Processing , TELECOMMUNICATIONSDOI:
http://dx.doi.org/10.1109/ICCWorkshops59551.2024.10615388Source URI:
https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10615388Metadata
Show full item recordThe following license files are associated with this item: