Orthogonal Time-Frequency Space Modulation: A Promising Next-Generation Waveform

Article Engineering, Electrical & Electronic

Transmitter and Receiver Window Designs for Orthogonal Time-Frequency Space Modulation

Zhiqiang Wei et al.

Summary: This paper investigates the impacts of transmitter and receiver windows on the performance of OTFS modulation and proposes window designs to improve channel estimation and data detection performance. The optimal transmitter window minimizes detection MSE and enhances the sparsity of the effective channel in the DD domain. Simulation results verify the superiority of the proposed window designs over the conventional rectangular window design in improving channel estimation and data detection performance.

IEEE TRANSACTIONS ON COMMUNICATIONS (2021)

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Article Engineering, Electrical & Electronic

Derivation of OTFS Modulation From First Principles

Saif Khan Mohammed

Summary: The paper rigorously derives Orthogonal Time Frequency Space (OTFS) modulation using the ZAK representation, providing robustness to channel induced Doppler shift. The received basis signals in the delay-Doppler (DD) domain are localized, reducing interference and allowing for joint equalization of information symbols. Compared to OFDM, DD domain modulation exhibits better robustness to channel induced Doppler shift.

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY (2021)

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Article Computer Science, Information Systems