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1 | 1 | Question description | ||||||
2 | 2 | How to design low-complexity precoding for MIMO-OTFS? | ||||||
3 | 3 | What are the typical coherence time and coherence bandwidth in delay-Doppler domain? | ||||||
4 | 4 | What are the objectives of time domain pulse shaping and time-frequency domain windowing? | ||||||
5 | 5 | Will the equivalent channel response also have a sparse representation if the ISFFT kernel is replaced by other unitary transformations, e.g. Hadamard transform? | ||||||
6 | 6 | Are the achievable rates of OTFS and OFDM the same? | ||||||
7 | 7 | Is OTFS suitable for underwater acoustic communications (UAC)? | ||||||
8 | 8 | Will OTFS perform better than OFDM for sensing purpose? | ||||||
9 | 9 | What's the weak points of OTFS? | ||||||
10 | 10 | what could be the advantages and challenges by introducing otfs in massive mimo? | ||||||
11 | 11 | What is the lower bound of the OTFS grid.(Size of M and N) | ||||||
12 | 12 | How to design OTFS in radar system | ||||||
13 | 13 | Is OTFS good for security purpose? | ||||||
14 | 14 | What is the difference between OTFS and OFDM used for radar parameter estimation？ | ||||||
15 | 15 | When OTFS is used for radar parameter estimation, what is the difference with traditional radar parameter estimation ，e.g. subspace algorithm ? | ||||||
16 | 16 | At present, what is the core problem that OTFS needs to solve in ISAC？ | ||||||
17 | 17 | What is the relationship between OTFS, Zak transform, and short time Fourier transform (STFT)? | ||||||
18 | 18 | Could you please elaborate on the aspects of using OTFS for channel estimation and for data transmission? | ||||||
19 | 19 | Leaving aside good channel properties of OTFS in high mobility situation, does OTFS have better equalization complexity or performance than OFDM? | ||||||
20 | 20 | 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? | ||||||
21 | 21 | 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? | ||||||
22 | 22 | How well can the biorthogonality property be satisfied, if not exactly, by practical waveforms? | ||||||
23 | 23 | Is a message passing decoder or such complex equalizers essential for the performance of OTFS? | ||||||
24 | 24 | Will designing better pulse shaping waveforms lead to better performance or a low complexity receiver? | ||||||
25 | 25 | For OTFS pulse shaping can be designed using hermite functions? | ||||||
26 | 26 | How do parameters change in the DD domain？ | ||||||
27 | 27 | 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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