Farhang, Arman and Rezazadehreyhani, Ahmad and Doyle, Linda E. and Farhang-Boroujeny, Behrouz (2018) Low Complexity Modem Structure for OFDM-based Orthogonal Time Frequency Space Modulation. IEEE Wireless Communications Letters, 7 (3). pp. 344-347. ISSN 2162-2337

Preview

Download (160kB) | Preview

Abstract

Orthogonal time frequency space (OTFS) modulation is a two-dimensional signaling technique that has recently emerged in the literature to tackle the time-varying (TV) wireless channels. OTFS deploys the Doppler-delay plane to multiplex the transmit data where the time variations of the TV channel are integrated over time and hence the equivalent channel relating the input and output of the system boils down to a time-invariant one. This signaling technique can be implemented on the top o f a given multicarrier waveform with the addition of precodin g and post-processing units to the modulator and demodulator. In this paper, we present discrete-time formulation of an OFDM - based OTFS system. We argue against deployment of window functions at the OTFS transmitter in realistic scenarios an d thus limit any sort of windowing to the receiver side. We stud y the channel impact in discrete-time providing deeper insights into OTFS systems. Moreover, our derivations lead to simplified modulator and demodulator structures that are far simpler than those in the literature.

Item Type:	Article
Additional Information:	Research conducted with the financial support of Science Foundation Ireland (SFI) and is co-funded under the European Regional Development Fund
Keywords:	Low Complexity Modem Structure; OFDM modulation; Orthogonal Time Frequency; Space Modulation;
Academic Unit:	Faculty of Science and Engineering > Electronic Engineering Faculty of Science and Engineering > Research Institutes > Hamilton Institute
Item ID:	13286
Identification Number:	https://doi.org/10.1109/LWC.2017.2776942
Depositing User:	Arman Farhang
Date Deposited:	24 Sep 2020 16:45
Journal or Publication Title:	IEEE Wireless Communications Letters
Publisher:	IEEE
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

Repository Staff Only(login required)

Item control page

Downloads

Origin of downloads