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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
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dc.contributor.advisor | 林茂昭(Mao-Chao Lin) | |
dc.contributor.advisor | 林茂昭(Mao-Chao Lin | mclin@ntu.edu.tw | ), | |
dc.contributor.author | Hsiang-Hsuan Fan | en |
dc.contributor.author | 范翔玄 | zh_TW |
dc.date.accessioned | 2023-03-19T22:34:58Z | - |
dc.date.copyright | 2022-09-12 | |
dc.date.issued | 2022 | |
dc.date.submitted | 2022-08-22 | |
dc.identifier.citation | [1] Z. Ding, Y. Liu, J. Choi, Q. Sun, M. Elkashlan, C.-L. I, and H. V. Poor, “Application of non-orthogonal multiple access in lte and 5g networks,” 2015. [2] N. Mokari, M. R. Javan, M. Moltafet, H. Saeedi, and H. Pishro-Nik, “A new multiple access technique for 5g: Power domain sparse code multiple access (psma),” 2017. [3] B. B. X. Dai, Z. Zhang, S. Chen, and S. Sun, “Pattern division multiple access: A new multiple access technology for 5g,” IEEE Wireless Communications, vol. 25, pp. 54–60, April 2018. [4] Y. H. et al., “Gain division multiple access for transmissions over independent fading channels,” 2019 IEEE VTS Asia Pacific Wireless Communications Symposium (APWCS), Singapore, pp. 1–5, 2019. [5] R. Hoshyar, F. P. Wathan, and R. Tafazolli, “Novel low-density signature for synchronous cdma systems over awgn channel,” IEEE Transactions on Signal Processing, vol. 56, no. 4, pp. 1616–1626, 2008. [6] H. Nikopour and H. Baligh, “Sparse code multiple access,” 2013. [7] N. K. Seung-Chan Lim and H. Park, “Uplink scma system with multiple antennas,”IEEE Transactions on Vehicular Technology, vol. 66, no. 8, pp. 6982–6992, 2017. [8] Z. Liu and L.-L. Yang, “Sparse or dense: A comparative study of codedomain noma systems,” IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, vol. 20, no. 8, pp. 4768–4780, 2021. [9] S.-K. L. Cheng-Yen Chang and M.-C. Lin, “Performance Comparison of GDMA, LDS-CDMA, and SCMA for Transmissions over Rayleigh Fading Channels,” 2021. [10] M. D. J.-F. H. Wissal Ben Ameur, Philippe Mary and J. Schwoerer, “Performance study of mpa, log-mpa and max-log-mpa for an uplink scma scenario,” 2019 26th International Conference on Telecommunications, 2019. [11] M. Taherzadeh, H. Nikopour, A. Bayesteh, and H. Baligh, “Scma codebook design,” 2014 IEEE 80th Vehicular Technology Conference (VTC2014-Fall), Sep 2014. [12] R. K.Jasmine, Dr.K.Kavitha, “Performance analysis of diversity techniques for wireless communication,” International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering (IJAREEIE), vol. 9, 2020. [13] T. Lin and L. Rasmussen, “Application of maximal ratio combining for iterative multiuser decoding,” International Symposium onInformation Theory, 2004. ISIT 2004. Proceedings, 2005. [14] C.-Y. Chang and M.-C. Lin, “Design and Application of Gain-Division Multiple Access,” 2021. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/84959 | - |
dc.description.abstract | 分增益多重存取(Gain-Division Multiple Access)技術是一種近幾年來無線通信領域中提出的非正交多重存取(Non-Orthogonal Multiple Access)。主要的原理是在設計多個用戶透過各自不同的通道係數在相同的通道資源下進行傳送。 先前的論文中描述,基於低密度簽名碼分碼多重存取(Low-Density Signature Code Division Multiple Access,LDS-CDMA)可視為具多樣(diversity)的GDMA系統。在此我們進一步將低密度簽名碼分碼多重接取視為具相關性的多個分增益多重存取系統的組合,其中每個資源對應到一個GDMA系統。原始應用於LDS-CDMA解碼中的消息傳遞演算法 (Message Passing Algorithm, MPA)也可以理解為多個GDMA系統之間的消息傳遞。我們將其概念進一步擴展至高密度分碼多重存取 (High-Density Code Division Multiple Access, HDS-CDMA)。HDS-CDMA系統的優點可以是對資源數量有較少的需求,或是讓系統擁有更多diversity進而使系統可以容納更多用戶等。 | zh_TW |
dc.description.abstract | The multiple access technique in wireless communication, Gain-Division Multiple Access (GDMA), is a non-orthogonal multiple access method proposed in recent years. The main principle of GDMA is that multiple users can transmit message under the same channel resource through their distinct channel coefficients associated with distinct users. In a previous thesis, based on the view of point that Low-Density Signature Code Division Multiple Access (LDS-CDMA) can be regarded as GDMA systems with diversity. Here, we further interpret the LDS-CDMA scheme as a combination of several dependent GDMA systems, where a GDMA system is applied to each resource. The original message passing for LDS-CDMA may also be interpreted as the message passing among various GDMA systems. We extend the interpretation to construct high-density (HDS) CDMA schemes. The advantage of HDS-CDMA schemes can be the requirement of smaller number of resources, or achieve more diversity that result in capability of accommodating more users in overall system, etc. | en |
dc.description.provenance | Made available in DSpace on 2023-03-19T22:34:58Z (GMT). No. of bitstreams: 1 U0001-1608202217011700.pdf: 4649146 bytes, checksum: 94e587bc0575ca464b71f8f71151d512 (MD5) Previous issue date: 2022 | en |
dc.description.tableofcontents | Acknowledgements iii 摘要 v Abstract vii Contents ix List of Figures xi Chapter 1 Introduction 1 Chapter 2 Gain-Division Multiple Access 5 2.1 Detection Principle 5 2.2 Implement Method 12 2.2.1 M-PSK GDMA Implementation 12 2.2.2 8QAM-GDMA Implementation 16 2.2.3 8PSK-GDMA Implementation 19 Chapter 3 Low-Density-Spreading Code Division Multiple Access 21 3.1 LDS-CDMA 22 3.1.1 System Model and Encoding 23 3.1.2 Message Passing Algorithm Decoding 26 3.1.2.1 Initialization 26 3.1.2.2 Iteration 27 3.1.2.3 Decision 29 3.1.3 Iterative GDMA Decoding 30 3.1.3.1 Algorithm Instructions 30 Chapter 4 High-Density CDMA 37 4.1 (3,2,3)-HDS CDMA 37 4.1.1 Processing On LLR-Value 38 4.1.1.1 Add LLR-Value Directly 39 4.1.1.2 Maximum Ratio Combining 44 4.1.2 Iterative GDMA Decoding 46 4.1.2.1 MPA 3 46 4.1.2.2 MPA 4 48 4.2 (6,4,4)-HDS CDMA 51 4.2.1 Algorithm Instructions 51 Chapter 5 Conclusions and Future Works 59 References 61 | |
dc.language.iso | en | |
dc.title | 分增益多重存取,低密度簽名碼分碼多重存取及高密度簽名碼分碼多重存取在衰落通道的研究 | zh_TW |
dc.title | Study on GDMA, LDS-CDMA and HDS-CDMA for Fading Channels | en |
dc.type | Thesis | |
dc.date.schoolyear | 110-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 趙啟超(Chi-Chao Chao),蘇育德(Yu-Te Su),蘇賜麟(Szu-Lin Su),呂忠津(Chung-Chin Lu) | |
dc.subject.keyword | 多重存取,低密度簽記,高密度簽記,訊息傳遞演算法, | zh_TW |
dc.subject.keyword | Multiple Access,Low-Density Signature,High-Density Signature,Message Passing Algorithm, | en |
dc.relation.page | 63 | |
dc.identifier.doi | 10.6342/NTU202202462 | |
dc.rights.note | 同意授權(限校園內公開) | |
dc.date.accepted | 2022-08-23 | |
dc.contributor.author-college | 電機資訊學院 | zh_TW |
dc.contributor.author-dept | 電信工程學研究所 | zh_TW |
dc.date.embargo-lift | 2022-09-12 | - |
顯示於系所單位: | 電信工程學研究所 |
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