OTFS modulation with phase noise in mmwave communications

Surabhi, GD and Ramachandran, MK and Chockalingam, A (2019) OTFS modulation with phase noise in mmwave communications. In: 89th IEEE Vehicular Technology Conference, VTC Spring 2019, 28 April - 1 May 2019, Kuala Lumpur.

PDF VTC Spring_2019.pdf - Published Version Restricted to Registered users only Download (12MB) | Request a copy

Abstract

Orthogonal time frequency space modulation (OTFS) modulation is a 2-dimensional modulation technique designed in delay-Doppler domain, suited for doubly dispersive wireless channels. OTFS modulation has been shown to achieve superior error performance compared to the conventional multi-carrier systems. In this paper, we investigate the effect of phase noise on the performance of OTFS modulation in mmWave communications, where oscillator phase noise and Doppler shifts are typically high. Towards this, we first develop a vectorized formulation of the input-output relation for OTFS modulation (with OFDM as the inner core) in the delay-Doppler domain, incorporating oscillator phase noise in the effective channel. Using a message passing based signal detection algorithm, we show that OTFS is more robust to oscillator phase noise than OFDM in high Doppler mmWave channels. At an SNR for 14 dB, OTFS achieves two to three order better BER performance compared to OFDM in the presence of oscillator phase noise in a 28 GHz system. © 2019 IEEE.

Item Type:	Conference Paper
Publication:	IEEE Vehicular Technology Conference
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Message passing; Millimeter waves; Modulation; Orthogonal frequency division multiplexing; Signal detection; Signal to noise ratio, Dispersive wireless channels; Doppler; Input-output relations; Mm-wave Communications; Modulation techniques; Multi carrier systems; Oscillator phase noise; Signal detection algorithm, Phase noise
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	13 Dec 2022 05:22
Last Modified:	13 Dec 2022 05:22
URI:	https://eprints.iisc.ac.in/id/eprint/78344

Actions (login required)

View Item