The MIMO-OTFS Technique in the Next 6G Communications

The orthogonal time-frequency space (OTFS) technique is a promising method of waveform modulation that encodes data in the delay-doppler (DD) domain. OTFS distinguishes itself from conventional multiplexing methods by employing two-dimensional modulation to alternate between the time-frequency (TF)...

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Bibliographic Details
Published inEngineering Access Vol. 10; no. 2; pp. 166 - 180
Main Authors Ali J. Ramadhan, Ali Taei Zadeh
Format Journal Article
LanguageEnglish
Published Faculty of Engineering, Mahasarakham University, Kham Riang Subdistrict, Kantharawichai District, Maha Sarakham Province, Postal Code 44150, Thailand 01.07.2024
Subjects
delay-doppler
high mobility
mimo
otfs
superimposed sequence pilot
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Summary:The orthogonal time-frequency space (OTFS) technique is a promising method of waveform modulation that encodes data in the delay-doppler (DD) domain. OTFS distinguishes itself from conventional multiplexing methods by employing two-dimensional modulation to alternate between the time-frequency (TF) domain and the delay-Doppler domain. This feature enables the management of Doppler shifts induced by high-speed objects, which is not possible with conventional modulation schemes such as orthogonal frequency division multiplexing (OFDM). The main objective of this work is to provide a concise and comprehensive introduction of this emerging subject, emphasizing its system concept. In addition, we analyze crucial elements of OTFS modulation, including techniques for data detection, channel estimation, MIMO, and multiuser systems.
ISSN:2730-4175
DOI:10.14456/mijet.2024.18