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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/91868完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 鐘嘉德 | zh_TW |
| dc.contributor.advisor | Char-Dir Chung | en |
| dc.contributor.author | 張維展 | zh_TW |
| dc.contributor.author | Wei-Chan Chang | en |
| dc.date.accessioned | 2024-02-26T16:11:36Z | - |
| dc.date.available | 2024-02-27 | - |
| dc.date.copyright | 2024-02-26 | - |
| dc.date.issued | 2023 | - |
| dc.date.submitted | 2023-08-09 | - |
| dc.identifier.citation | R. Hadani et al., “Orthogonal time frequency space modulation,” in Proc. IEEE Wireless Commun. Netw. Conf., San Francisco, CA, USA, Mar. 2017, pp. 1-6.
R. Hadani et al., Orthogonal Time Frequency Space Modulation. Accessed: Aug. 2018. [Online]. Available: https://arxiv.org/pdf/ 1808.00519.pdf. P. Raviteja, Y. Hong, E. Viterbo, and E. Biglieri, “Practical pulse-shaping wave-forms for reduced-cyclic-prefix OTFS, ” IEEE Trans. Veh. Tech., vol. 68, no. 1, pp. 957-961, Jan. 2019. Hashimoto et al., “Channel estimation and equalization for CP-OFDM based OTFS in fractional Doppler channels, ” in Proc. IEEE Int. Conf. Commun., Virtu-al/Montreal, Jun. 2021, pp. 1-7. S. S. Das, V. Rangamgari, S. Tiwari, and S. C. Mondal, “Time domain channel es-timation and equalization of CP-OTFS under multiple fractional Dopplers and re-sidual synchronization errors, ” IEEE Access, vol. 9, pp. 10561-10576, Jan. 2021. P. Raviteja, K. T. Phan, Y. Hong and E. Viterbo, “Interference cancellation and it-erative detection for orthogonal time frequency space modulation, ” IEEE Trans. Wireless Commun., vol. 17, no. 10, pp. 6501-6515, Oct. 2018. S. Rakib and R. Hadani, “Multiple access in wireless telecommunications system for high-mobility applications, ” U.S. Patent 9 722 741 B1, Aug. 2017. V. Khammammetti and S. K. Mohammed, “OTFS based multiple-access in high Doppler and delay spread wireless channels, ” IEEE Wireless Commun. Lett., vol. 8, no. 2, pp. 528-531, Apr. 2019. R. M. Augustine and A. Chockalingam, “Interleaved time-frequency multiple ac-cess using OTFS modulation, ” in Proc. IEEE 90th Veh. Technol. Conf. (VTC-Fall), Honolulu, HI, USA, Sep. 2019, pp. 1-5. V. Khammammetti and S. K. Mohammed, “Spectral Efficiency of OTFS Based Orthogonal Multiple Access With Rectangular Pulses, ” IEEE Trans. Ve¬h. Tech., vol. 71, no. 12, pp. 12989-13006, Dec. 2022. A. Chatterjee, V. Rangamgari, S. Tiwari, and S. S. Das, “Nonorthogonal multiple access with orthogonal time frequency space signal transmission, ” IEEE Systems J., vol. 15, no. 1, pp. 383-394, Mar. 2021. K. Deka, A. Thomas, and S. Sharma, “OTFS-SCMA: A code-domain NOMA ap-proach for orthogonal time frequency space modulation, ” IEEE Trans. Commun., doi: 10.1109/TCOMM.2021.3075237. Z. Kang, H. Zhao, and H. Wang, “An efficient two-dimension OTFS-NOMA scheme based on heterogenous mobility users grouping, ” in Proc. IEEE Int. Conf. Commun. Technol., 2021, pp.726-730. M. Li, S. Zhang, P. Fan, and O. A. Dobre, “Multiple access for massive MIMO-OTFS networks over angle-delay-doppler domain, ” in Proc. IEEE Global Com¬mun. Conf., Taipei, Taiwan, 2020, pp. 1-6. B. C. Pandey, S. K. Mohammed, P. Raviteja, Y. Hong and E. Viterbo, “Low Com-plexity Precoding and Detection in Multi-User Massive MIMO OTFS Downlink, ” IEEE Trans. Veh. Technol., vol. 70, no. 5, pp. 4389-4405, May. 2021. D. Tse and P. Viswanath, Fundamentals of Wireless Communication. Cambridge University Press, 2005. J. Jang and K. B. Lee, “Transmit power adaptation for multiuser OFDM systems, ” IEEE J. Sel. Areas Commun., vol. 21, no. 2, pp. 171-178, Feb. 2003. Z. Shen, J. G. Andrews, and B. L. Evans, “Optimal power allocation in multiuser OFDM systems, ” in Proc. IEEE Glob. Telecommun. Conf., vol.1, pp. 337-341, Dec. 2003. Seo, H. and B. Lee, “A proportional-fair power allocation scheme for fair and effi-cient multiuser OFDM systems, ” in Proc. IEEE Glob. Telecommun. Conf., vol. 6, pp. 3737-3741, Jan. 2004. S. C. Yang, OFDMA System Analysis and Design. Artech House, 2010. 3GPP TS 38.212 V15.0.0, NR; Multiplexing and channel coding, Jul. 2020. | - |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/91868 | - |
| dc.description.abstract | 正交時頻間距(orthogonal time frequency space; OTFS)調變系統是一個多載波調變技術。適用於具稀疏延遲(delay)和都卜勒(Doppler)擴散性質的高速移動雙重選擇性通道(doubly selective channel)之訊號傳輸。相較於正交分頻多工(orthogonal frequency-division multiplexing; OFDM)等傳統多載波調變技術，訊號對於雙重選擇性通道會有更穩定及強健的表現。然而，在無線通訊領域中多重存取(multiple access; MA)技術是一個能夠實現多用戶之間共享有限頻譜資源的重要方式，因此在接收端對於訊號通過雙重選擇性通道是否存在多重用戶干擾(multi-user interfer¬ence; MUI)是一個很重要的課題。在本篇論文中，共提出4種基於正交多重存取(orthogonal multiple access; OMA)技術設計的方案，並且透過將循環前綴(cyclic-prefix; CP)技術引入OTFS系統中來解決接收端會造成MUI的狀況。而關於正交多重存取式OTFS的可實現的數據速率(achievable data rate; ADR)和符元決策等特性亦於本篇做了研究與探討。 | zh_TW |
| dc.description.abstract | Orthogonal time frequency space (OTFS) modulation system is a multicarrier modulation technique suitable for signal transmission over high-speed mobile doubly selective channels with sparse delay and Doppler spread characteristics. Compared to traditional multicarrier modulation techniques like orthogonal frequency-division multiplexing (OFDM), OTFS provides more stable and robust performance for doubly selective channels. However, in the field of wireless communication, multiple access (MA) tech¬niques are essential for achieving shared spectrum resources among multiple users. Therefore, it is crucial to address the issue of multi-user interference (MUI) when signals pass through doubly selective channels at the receiver end. In this paper, four strategies based on orthogonal multiple access (OMA) techniques are proposed. The cyclic pre¬fix (CP) technique is introduced into the OTFS system to mitigate the MUI caused at the receiver. Additionally, the achievable data rate (ADR) and symbol deci¬sion characteristics of the orthogonal multiple access-based OTFS are studied and dis¬cussed in this paper. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2024-02-26T16:11:35Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2024-02-26T16:11:36Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 致謝 i
中文摘要 ii Abstract iii Contents iv List of Figures vii List of Tables x 1 Introduction 1 1.1 Introduction of OTFS 1 1.2 Introduction of OTFS based-Multiple Access 3 1.3 Motivation and Contributions 5 1.4 Notation 6 2 Downlink IOMA and LOMA Systems 8 2.1 Downlink IOMA System 10 2.1.1 Downlink IOMA Transmitter 11 2.1.2 Downlink IOMA Receiver at UT i 13 2.1.3 ADR Analysis 16 2.1.4 LMMSE Equalized Symbol Decision 16 2.2 Downlink LOMA System 18 2.2.1 Downlink LOMA Transmitter 18 2.2.2 Downlink LOMA Receiver at UT i 20 2.2.3 ADR Analysis 21 2.2.4 LMMSE Equalized Symbol Decision 22 2.3 Performance Results 23 2.3.1 Achievable Data Rate Characteristic 25 2.3.2 Equalized Symbol Decision Characteristic 26 2.4 Performance Comparison 31 3 Downlink TD-IOMA and TD-LOMA Systems 34 3.1 Downlink TD-IOMA System 36 3.1.1 Downlink TD-IOMA Transmitter 36 3.1.2 Downlink TD-IOMA Receiver at UT i 38 3.1.3 ADR Analysis 39 3.1.4 LMMSE Equalized Symbol Decision 39 3.2 Downlink TD-LOMA System 40 3.2.1 Downlink LOMA Transmitter 40 3.2.2 Downlink TD-LOMA Receiver at UT i 42 3.2.3 ADR Analysis 43 3.2.4 LMMSE Equalized Symbol Decision 43 3.3 Performance Comparison 43 3.3.1 Achievable Data Rate Characteristic 45 3.3.2 Equalized Symbol Decision Characteristic 46 3.4 Computational Complexity 49 4 Conclusion 52 Bibliography 53 Appendix 56 Appendix A. Derivation of Average Power for Downlink IOMA Signal 56 Appendix B. Derivation of (2.1.4) 57 Appendix C. Derivation of (2.1.8) 58 Appendix D. Derivation of Average Power for Downlink LOMA Signal 59 Appendix E. Derivation of (2.2.5) 60 Appendix F. Derivation of Average Power for Downlink TD-IOMA Signal 61 Appendix G. Derivation of Average Power for Downlink TD-LOMA Signal 62 | - |
| dc.language.iso | en | - |
| dc.subject | 雙重選擇性通道 | zh_TW |
| dc.subject | 正交時頻間距調變 | zh_TW |
| dc.subject | 符元決策 | zh_TW |
| dc.subject | 循環前綴 | zh_TW |
| dc.subject | 多重存取 | zh_TW |
| dc.subject | Orthogonal time frequency space modulation | en |
| dc.subject | Doubly selective channel | en |
| dc.subject | Symbol decision | en |
| dc.subject | Cyclic prefix | en |
| dc.subject | Multiple access | en |
| dc.title | CP-OTFS系統之正交多重存取技術之探討 | zh_TW |
| dc.title | Orthogonal Multiple Access Techniques for CP-OTFS | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 111-2 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.coadvisor | 陳維昌 | zh_TW |
| dc.contributor.coadvisor | Wei-Chang Chen | en |
| dc.contributor.oralexamcommittee | 李穎;謝欣霖;古孟霖 | zh_TW |
| dc.contributor.oralexamcommittee | Ying Li ;Shin-Lin Shieh;Meng-Lin Ku | en |
| dc.subject.keyword | 正交時頻間距調變,雙重選擇性通道,多重存取,循環前綴,符元決策, | zh_TW |
| dc.subject.keyword | Orthogonal time frequency space modulation,Doubly selective channel,Multiple access,Cyclic prefix,Symbol decision, | en |
| dc.relation.page | 63 | - |
| dc.identifier.doi | 10.6342/NTU202303147 | - |
| dc.rights.note | 同意授權(限校園內公開) | - |
| dc.date.accepted | 2023-08-09 | - |
| dc.contributor.author-college | 電機資訊學院 | - |
| dc.contributor.author-dept | 電信工程學研究所 | - |
| 顯示於系所單位： | 電信工程學研究所 | |
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