DFT-s-OFDM for sub-THz Transmission -- Tracking and Compensation of Phase Noise

TL;DR

This paper presents a novel interpolation filter algorithm for DFT-s-OFDM systems that effectively estimates and compensates phase noise in sub-THz wireless transmissions, enhancing performance with high-order modulation.

Contribution

Introduction of an interpolation filter algorithm that leverages stochastic phase noise properties for improved phase noise compensation in sub-THz DFT-s-OFDM systems.

Findings

Performance improvement over existing techniques.

Effective phase noise compensation at high-order modulation.

Compatibility with 3GPP phase tracking signals.

Abstract

For future wireless communication technologies, an increase in capabilities such as throughput is strongly expected. Transmission in the sub-THz bands (>90 GHz) seems to be the potential solution to meet the ever-increasing capacity demands due to the large unexploited bandwidth. Oscillators used at these frequencies generate phase noise that induces critical distortions in the signal that must be addressed. The correlated nature of PN makes it difficult to overcome. Nowadays, there is a growing interest in considering the extension of multicarrier based waveforms of the 5G new radio for transmissions in the sub-THz bands. In this paper, we introduce a new algorithm called the interpolation filter (IF), which efficiently estimates and compensates PN effects on DFT-s-OFDM systems. Specifically, it is based on the use of stochastic properties of the PN and is compatible with the 3GPP phase tracking reference signal scheme. We highlight a performance improvement over known techniques when using high-order modulation.