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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 蘇炫榮 | zh_TW |
| dc.contributor.advisor | Hsuan-Jung Su | en |
| dc.contributor.author | 李翊銘 | zh_TW |
| dc.contributor.author | Yi-Ming Li | en |
| dc.date.accessioned | 2024-09-11T16:11:00Z | - |
| dc.date.available | 2024-09-12 | - |
| dc.date.copyright | 2024-09-11 | - |
| dc.date.issued | 2024 | - |
| dc.date.submitted | 2024-08-06 | - |
| dc.identifier.citation | [1] W. Yuan, S. Li, Z. Wei, J. Yuan, and D. W. K. Ng, “Data-aided channel estimation for otfs systems with a superimposed pilot and data transmission scheme,” IEEE Wireless Communications Letters, vol. 10, no. 9, pp. 1954–1958, 2021.
[2] R. Hadani, S. Rakib, M. Tsatsanis, A. Monk, A. J. Goldsmith, A. F. Molisch, and R. Calderbank, “Orthogonal time frequency space modulation,” in 2017 IEEE Wireless Communications and Networking Conference (WCNC), 2017, pp. 1–6. [3] S. K. Mohammed, “Derivation of otfs modulation from first principles,” IEEE Transactions on Vehicular Technology, vol. 70, no. 8, pp. 7619–7636, 2021. [4] S. K. Mohammed, R. Hadani, A. Chockalingam, and R. Calderbank,“Otfs—a mathematical foundation for communication and radar sensing in the delay-doppler domain,” IEEE BITS the Information Theory Magazine, vol. 2, no. 2, pp. 36–55, 2022. [5] ——, “Otfs—predictability in the delay-doppler domain and its value to communication and radar sensing,” IEEE BITS the Information Theory Magazine, vol. 3, no. 2, pp. 7–31, 2023. [6] F. Lampel, A. Avarado, and F. M. Willems, “On otfs using the discrete zak transform,” in 2022 IEEE International Conference on Communications Workshops (ICC Workshops), 2022, pp. 729–734. [7] S. Li, W. Yuan, Z. Wei, J. Yuan, B. Bai, and G. Caire, “On the pulse shaping for delay-doppler communications,” in GLOBECOM 2023 - 2023 IEEE Global Communications Conference, 2023, pp. 4909–4914. [8] P. Raviteja, K. T. Phan, and Y. Hong, “Embedded pilot-aided channel estimation for otfs in delay–doppler channels,” IEEE Transactions on Vehicular Technology, vol. 68, no. 5, pp. 4906–4917, 2019. [9] H. Zhao, Z. Kang, and H. Wang, “A novel channel estimation scheme for otfs,” in 2020 IEEE 20th International Conference on Communication Technology (ICCT), 2020, pp. 12–16. [10] N. Hashimoto, N. Osawa, K. Yamazaki, and S. Ibi, “Channel estimation and equalization for cp-ofdm-based otfs in fractional doppler channels,” in 2021 IEEE International Conference on Communications Workshops (ICC Workshops), 2021, pp. 1–7. [11] Z. Li, W. Yuan, C. You, and Y. Cui, “Efficient channel estimation for otfs systems in the presence of fractional doppler,” in 2023 IEEE Wireless Communications and Networking Conference (WCNC), 2023, pp. 1–5. [12] Q. Ren, Q. Li, Z. Xu, and Z. Pan, “Low overhead pilot design for channel estimation in mimo-otfs systems,” in 2023 IEEE/CIC International Conference on Communications in China (ICCC Workshops), 2023, pp. 1–6. [13] D. Shi, W. Wang, L. You, X. Song, Y. Hong, X. Gao, and G. Fettweis, “Deterministic pilot design and channel estimation for downlink massive mimo-otfs systems in presence of the fractional doppler,” IEEE Transactions on Wireless Communications, vol. 20, no. 11, pp. 7151–7165, 2021. [14] S. Wang, J. Guo, X. Wang, W. Yuan, and Z. Fei, “Pilot design and optimization for otfs modulation,” IEEE Wireless Communications Letters, vol. 10, no. 8, pp. 1742–1746, 2021. [15] Y. Liang, Q. Wang, and P. Fan, “Pilot-aided channel estimation scheme based on frank array for otfs under rapidly time-varying channels,” in 2022 IEEE 95th Vehicular Technology Conference: (VTC2022-Spring), 2022, pp. 1–6. [16] H. B. Mishra, P. Singh, A. K. Prasad, and R. Budhiraja, “Otfs channel estimation and data detection designs with superimposed pilots,” IEEE Transactions on Wireless Communications, vol. 21, no. 4, pp. 2258–2274, 2022. [17] R. Ouchikh, A. A ̈ıssa-El-Bey, T. Chonavel, and M. Djeddou, “Iterative channel estimation and data detection algorithm for otfs modulation,” in ICASSP 2022 - 2022 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2022, pp. 5263–5267. [18] O. A. Aghda, M. J. Omidi, and H. Saeedi-Sourck, “Superimposed channel estimation in otfs modulation using compressive sensing,” in 2023 31st International Conference on Electrical Engineering (ICEE), 2023, pp. 756–761. [19] A. Gao, H. Yu, and H. Wang, “Otfs channel estimation with superimposed pilots based on compressed sensing,” in 2023 International Conference on Wireless Communications and Signal Processing (WCSP), 2023, pp. 1114–1119. [20] S. Kumari, H. B. Mishra, and S. Mukhopadhyay, “Peak-to-average power ratio analysis for embedded pilot and superimposed pilot aided otfs waveform,” in 2023 IEEE Guwahati Subsection Conference (GCON), 2023, pp. 1–6. [21] F. Jesbin, S. Rao Mattu, and A. Chockalingam, “Sparse superimposed pilot based channel estimation in otfs systems,” in 2023 IEEE Wireless Communications and Networking Conference (WCNC), 2023, pp. 1–6. [22] W. Liu, L. Zou, B. Bai, and T. Sun, “Low papr channel estimation for otfs with scattered superimposed pilots,” China Communications, vol. 20, no. 1, pp. 79–87, 2023. [23] Z. Chen, X. Zheng, and X. Chen, “Delay-wise superimposed pilot based compressed sensing channel estimation for otfs systems,” in 2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall), 2023, pp. 1–5. [24] P. Raviteja, Y. Hong, E. Viterbo, and E. Biglieri, “Practical pulseshaping waveforms for reduced-cyclic-prefix otfs,” IEEE Transactions on Vehicular Technology, vol. 68, no. 1, pp. 957–961, 2019. [25] D. Gregoratti, X. Arteaga, and J. Broquetas, “Mathematical properties of the zadoff-chu sequences,” arXiv preprint arXiv:2311.01035, 2023. | - |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/95496 | - |
| dc.description.abstract | 正交時頻空間調變是一種用於有效處理高速時變通道的調變方法，已經在很多論文中被廣泛的討論。而基於札克變換的正交時頻空間調變在近幾年被提出，做為正交時頻空間調變的延伸，透過該調變方法能夠直接通過接收端取樣訊號重建訊號輸入輸出關係，而無需完全了解底層通道係數。
在本論文中，根據基於札克變換的正交時頻空間調變的特性，推導了使用扎德奧夫-朱序列做為導頻序列的可行性並提出了一種基於多個扎德奧夫-朱序列的疊加導頻符號輔助迭代通道估計與數據檢測的方法。這種導頻放置的方式使我們能在延遲-都普勒域上設置比原有分散導頻方案更多的導頻符號，並且額外放置的導頻僅增加少量導頻之間的污染，這有助於減輕通道估計時由數據符號引起的干擾，能得到更精準的通道估計結果。 模擬結果顯示，與原有的分散疊加導頻方案相比，所提出的疊加導頻放置方案在保持相同的峰值平均功率比的前提下實現了更低的誤碼率。 | zh_TW |
| dc.description.abstract | The Orthogonal Time Frequency Space (OTFS) modulation is a novel approach designed to effectively handle fast time-varying channels. The Zak transform-based OTFS (Zak-OTFS), as an extension of OTFS, can directly reconstruct the input-output (I/O) relationship through receiver samples without needing to fully understand channel coefficients. In this thesis, the suitability of placing Zadoff-Chu (ZC) sequence as pilot sequence is derived, and a superimposed pilot-aided iterative channel estimation and data detection scheme based on multiple ZC sequences for Zak-OTFS systems is proposed. This form of pilots allows us to set more pilots than the existing scattered pilots scheme on Delay-Doppler (DD) domain and perform channel estimation without or with little pilot pollution, which helps mitigate the interference caused by data symbols. The simulation results demonstrate that the proposed scheme achieves superior BER performance compared to scattered pilot schemes while maintaining the same peak-to-average power ratio (PAPR) performance. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2024-09-11T16:11:00Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2024-09-11T16:11:00Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | Master’s Thesis Acceptance Certificate i
Acknowledgment ii Abstract (Traditional Chinese) iii Abstract (English) iv 1 Introduction 1 1.1 Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Related Works . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.3 Contributions . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.4 Overview of the Thesis . . . . . . . . . . . . . . . . . . . . . . 8 1.5 Notations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2 System Model 10 2.1 Multi-Carrier OTFS . . . . . . . . . . . . . . . . . . . . . . . 10 2.1.1 Basic Concept of MC-OTFS . . . . . . . . . . . . . . . 10 2.1.2 Transmitter of MC-OTFS . . . . . . . . . . . . . . . . 12 2.1.3 Channel of MC-OTFS . . . . . . . . . . . . . . . . . . 13 2.1.4 Receiver of MC-OTFS . . . . . . . . . . . . . . . . . . 14 2.2 Zak Transform-Based OTFS . . . . . . . . . . . . . . . . . . . 15 2.2.1 Basic Concept of Zak-OTFS . . . . . . . . . . . . . . . 15 2.2.2 Transmitter of Zak-OTFS . . . . . . . . . . . . . . . . 17 2.2.3 Channel of Zak-OTFS . . . . . . . . . . . . . . . . . . 19 2.2.4 Receiver of Zak-OTFS . . . . . . . . . . . . . . . . . . 20 2.3 Characteristic of OTFS . . . . . . . . . . . . . . . . . . . . . . 21 3 Zadoff-Chu Pilot Sequence in Zak-OTFS 24 3.1 The Introduction of Zadoff-Chu Sequence . . . . . . . . . . . . 24 3.2 Zadoff-Chu Pilot Sequence Placement on DD Domain . . . . . 26 4 The Communication System with Superimposed Pilots 30 4.1 Introduction of the Superimposed Pilot OTFS System . . . . . 30 4.2 The Proposed Pilot Placement Scheme on Superimposed Pilot Zak-OTFS System . . . . . . . . . . . . . . . . . . . . . . . . 35 5 Simulation Results 42 6 Conclusion 50 7 Future Work 51 7.1 Multi-User Scenario . . . . . . . . . . . . . . . . . . . . . . . . 51 7.2 Unlimited N . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Bibliography 53 | - |
| dc.language.iso | en | - |
| dc.subject | 疊加導頻符號 | zh_TW |
| dc.subject | 扎德奧夫-朱序列 | zh_TW |
| dc.subject | 迭代通道估計與數據檢測 | zh_TW |
| dc.subject | 札克轉換 | zh_TW |
| dc.subject | 正交時頻空間調變 | zh_TW |
| dc.subject | Iterative channel estimation and data detection | en |
| dc.subject | OTFS | en |
| dc.subject | Zak transform | en |
| dc.subject | Superimposed pilots | en |
| dc.subject | Zadoff-Chu sequence | en |
| dc.title | 基於札克變換的正交時頻空間調變通訊系統上使用多疊加導頻序列進行迭代通道估計及數據檢測 | zh_TW |
| dc.title | Iterative Channel Estimation and Data Detection Using Superimposed Pilot Sequences on Zak-OTFS Communication System | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 112-2 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.oralexamcommittee | 劉俊麟;李佳翰 | zh_TW |
| dc.contributor.oralexamcommittee | Chun-Lin Liu;Chia-Han Lee | en |
| dc.subject.keyword | 正交時頻空間調變,札克轉換,疊加導頻符號,扎德奧夫-朱序列,迭代通道估計與數據檢測, | zh_TW |
| dc.subject.keyword | OTFS,Zak transform,Superimposed pilots,Zadoff-Chu sequence,Iterative channel estimation and data detection, | en |
| dc.relation.page | 57 | - |
| dc.identifier.doi | 10.6342/NTU202402761 | - |
| dc.rights.note | 同意授權(限校園內公開) | - |
| dc.date.accepted | 2024-08-09 | - |
| dc.contributor.author-college | 電機資訊學院 | - |
| dc.contributor.author-dept | 電信工程學研究所 | - |
| dc.date.embargo-lift | 2026-07-31 | - |
| 顯示於系所單位： | 電信工程學研究所 | |
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