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1Question description
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2How to design low-complexity precoding for MIMO-OTFS?
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What are the typical coherence time and coherence bandwidth in delay-Doppler domain?
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What are the objectives of time domain pulse shaping and time-frequency domain windowing?
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Will the equivalent channel response also have a sparse representation if the ISFFT kernel is replaced by other unitary transformations, e.g. Hadamard transform?
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6Are the achievable rates of OTFS and OFDM the same?
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Is OTFS suitable for underwater acoustic communications (UAC)?
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8Will OTFS perform better than OFDM for sensing purpose?
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9What's the weak points of OTFS?
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what could be the advantages and challenges by introducing otfs in massive mimo?
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What is the lower bound of the OTFS grid.(Size of M and N)
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12How to design OTFS in radar system
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13Is OTFS good for security purpose?
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What is the difference between OTFS and OFDM used for radar parameter estimation?
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When OTFS is used for radar parameter estimation, what is the difference with traditional radar parameter estimation ,e.g. subspace algorithm ?
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At present, what is the core problem that OTFS needs to solve in ISAC?
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What is the relationship between OTFS, Zak transform, and short time Fourier transform (STFT)?
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Could you please elaborate on the aspects of using OTFS for channel estimation and for data transmission?
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Leaving aside good channel properties of OTFS in high mobility situation, does OTFS have better equalization complexity or performance than OFDM?
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How expensive is the ISFFT operation on hardware when compared to the IFFT operation? Do you think designing an efficient hardware architecture of the ISFFT operation can be a good topic to research on?
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Is there any measured data collected from the real world to demonstrate the low-variability of the channel in the delay-Doppler domain? How robust is it?
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How well can the biorthogonality property be satisfied, if not exactly, by practical waveforms?
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Is a message passing decoder or such complex equalizers essential for the performance of OTFS?
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Will designing better pulse shaping waveforms lead to better performance or a low complexity receiver?
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For OTFS pulse shaping can be designed using hermite functions?
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26How do parameters change in the DD domain?
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In the paper "Orthogonal Time-Frequency Space Modulation: A Promising Next-Generation Waveform", it is mentioned that the DD domain channel can achieve a coherence time of 100ms. What is the definition of coherence time and how is it calculated?
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