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Orthogonal Time Frequency Space (OTFS) Modulation for Wireless Communications
Shuangyang Li · 2022-08-25 · via eess.SP updates on arXiv.org

Orthogonal time frequency space (OTFS) modulation is a recently proposed multi-carrier transmission scheme, which innovatively multiplexes the information symbols in the delay-Doppler (DD) domain instead of the conventional time-frequency (TF) domain. The DD domain symbol multiplexing gives rise to a direct interaction between the DD domain information symbols and DD domain channel responses, which are usually quasi-static, compact, separable, and potentially sparse. Therefore, OTFS modulation enjoys appealing advantages over the conventional orthogonal frequency-division multiplexing (OFDM) modulation for wireless communications. In this thesis, we investigate the related subjects of OTFS modulation for wireless communications, specifically focusing on its signal detection, performance analysis, and applications. These important aspects are discussed based on the review of the state-of-the-art and a detailed derivation of OTFS modulation from the discrete Zak transform (DZT). Finally, a summary of future research directions on OTFS modulation are also provided.

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