The paper explores the fundamentals of Delay-Doppler (DD) communications, focusing on the practical implementation and extensions to Orthogonal Time Frequency Space (OTFS) modulation. It starts by presenting general DD communications from the Zak transform perspective, highlighting unique signal structures beneficial for communication. Practical implementations of DD Nyquist communications are discussed, emphasizing orthogonality achieved through different windowing techniques. The paper also delves into pulse shaping frameworks and numerical results showcasing advantages over OFDM. The importance of the Zak transform in OTFS is emphasized, with recent developments like OTFS 2.0 highlighted for their simplified input-output relations purely in the DD domain.
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by Shuangyang L... في arxiv.org 03-22-2024
https://arxiv.org/pdf/2403.14192.pdfاستفسارات أعمق