A | B | C | D | E | F | G | H | |
---|---|---|---|---|---|---|---|---|

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? | ||||||

28 | ||||||||

29 | ||||||||

30 | ||||||||

31 | ||||||||

32 | ||||||||

33 | ||||||||

34 | ||||||||

35 | ||||||||

36 | ||||||||

37 | ||||||||

38 | ||||||||

39 | ||||||||

40 | ||||||||

41 | ||||||||

42 | ||||||||

43 | ||||||||

44 | ||||||||

45 | ||||||||

46 | ||||||||

47 | ||||||||

48 | ||||||||

49 | ||||||||

50 | ||||||||

51 | ||||||||

52 | ||||||||

53 | ||||||||

54 | ||||||||

55 | ||||||||

56 | ||||||||

57 | ||||||||

58 | ||||||||

59 | ||||||||

60 | ||||||||

61 | ||||||||

62 | ||||||||

63 | ||||||||

64 | ||||||||

65 | ||||||||

66 | ||||||||

67 | ||||||||

68 | ||||||||

69 | ||||||||

70 | ||||||||

71 | ||||||||

72 | ||||||||

73 | ||||||||

74 | ||||||||

75 | ||||||||

76 | ||||||||

77 | ||||||||

78 | ||||||||

79 | ||||||||

80 | ||||||||

81 | ||||||||

82 | ||||||||

83 | ||||||||

84 | ||||||||

85 | ||||||||

86 | ||||||||

87 | ||||||||

88 | ||||||||

89 | ||||||||

90 | ||||||||

91 | ||||||||

92 | ||||||||

93 | ||||||||

94 | ||||||||

95 | ||||||||

96 | ||||||||

97 | ||||||||

98 | ||||||||

99 | ||||||||

100 |