On the Effect of Oscillator Phase Noise on the Performance of OFDM Systems in Sub-THz Band

Neshaastegaran, Peyman; Jian, Ming

doi:10.1109/icspcs50536.2020.9310007

Cited by 7 publications

(2 citation statements)

References 21 publications

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“…Furthermore, hardware imperfections and radio frequency (RF) impairments critically impact THz waveform design, where candidate THz materials/hardware are still under development. Hardware imperfections include PA non-linearity, wideband in/quadrature-phase imbalance (IQI) [50], phase uncertainty in the phase-shifters (PSs) [51], and PHN (studied for SC schemes [52] and CP-OFDM [53] in sub-THz and THz [50] systems). THz channel-induced phenomena such as beam split and misalignment [54] are also critical, especially with UM-MIMO systems.…”

Section: Introductionmentioning

confidence: 99%

Single- Versus Multicarrier Terahertz-Band Communications: A Comparative Study

Tarboush

Sarieddeen

Alouini

et al. 2022

IEEE Open J. Commun. Soc.

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The prospects of utilizing single-carrier (SC) and multi-carrier (MC) waveforms in future terahertz (THz)-band communication systems remain unresolved. On the one hand, the limited multi-path components at high frequencies result in frequency-flat channels that favor low-complexity wideband SC systems. On the other hand, frequency-dependent molecular absorption and transceiver characteristics and the existence of multi-path components in indoor sub-THz systems can still result in frequency-selective channels, favoring off-the-shelf MC schemes such as orthogonal frequency-division multiplexing (OFDM). Variations of SC/MC designs result in different THz spectrum utilization, but spectral efficiency is not the primary concern with substantial available bandwidths; baseband complexity, power efficiency, and hardware impairment constraints are predominant. This paper presents a comprehensive study of SC/MC waveforms for THz communications, utilizing an accurate wideband THz channel model and highlighting the various performance and complexity trade-offs of the candidate schemes. Simulations demonstrate that discrete-Fourier-transform spread orthogonal time-frequency space (DFT-s-OTFS) achieves a lower peak-to-average power ratio (PAPR) than OFDM and OTFS and enhances immunity to THz impairments and Doppler spreads, but at an increased complexity cost. Moreover, DFT-s-OFDM is a promising candidate that increases robustness to THz impairments and phase noise (PHN) at a low PAPR and overall complexity.

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Section: Introductionmentioning

confidence: 99%

Single- Versus Multicarrier Terahertz-Band Communications: A Comparative Study

Tarboush

Sarieddeen

Alouini

et al. 2022

IEEE Open J. Commun. Soc.

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“…Furthermore, hardware imperfections and radio frequency (RF) impairments critically impact THz WF design, where candidate THz materials/hardware are still under development. Hardware imperfections include PA non-linearity, wideband in/quadrature-phase imbalance (IQI) [40], phase uncertainty in the phase-shifters (PSs) [41], and PHN (studied for SC schemes [42] and CP-OFDM [43] in sub-THz and THz [40] systems). THz channelinduced phenomena such as beam split and misalignment [44] are also critical, especially with UM-MIMO systems.…”

Section: Introductionmentioning

confidence: 99%

Single- versus Multi-Carrier Terahertz-Band Communications: A Comparative Study

Tarboush¹,

Sarieddeen²,

Alouini³

et al. 2021

Preprint

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The prospects of utilizing single-carrier (SC) and multi-carrier (MC) waveforms in future terahertz (THz)-band communication systems remain unresolved. On the one hand, the limited multi-path (MP) components at high frequencies result in frequency-flat channels that favor low-complexity wideband SC systems. On the other hand, frequency-dependent molecular absorption and transceiver characteristics and the existence of MP components in indoor sub-THz systems can still result in frequency-selective channels, favoring off-the-shelf MC schemes such as orthogonal frequency-division multiplexing (OFDM). Variations of SC/MC designs result in different THz spectrum utilization, but spectral efficiency is not the primary concern with substantial available bandwidths; baseband complexity, power efficiency, and hardware impairment constraints are predominant. This paper presents a comprehensive study of SC/MC modulations for THz communications, utilizing an accurate wideband THz channel model and highlighting the various performance and complexity trade-offs of the candidate schemes. Simulations demonstrate the robustness of discrete-Fourier-transform spread OFDM (DFT-s-OFDM) to THz impairments and orthogonal time-frequency space (OTFS) to THz Doppler spreads.

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