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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 林茂昭(Mao-Chao Lin) | |
dc.contributor.author | Bei-Hao Chang | en |
dc.contributor.author | 張倍豪 | zh_TW |
dc.date.accessioned | 2021-06-17T04:33:20Z | - |
dc.date.available | 2020-08-13 | |
dc.date.copyright | 2018-08-13 | |
dc.date.issued | 2018 | |
dc.date.submitted | 2018-08-10 | |
dc.identifier.citation | [1] L. Ping, L. Liu, K. Wu, and W. K. Leung, “Interleave division multiple-access,” IEEE Transactions on Wireless Communications, vol. 5, pp. 938–947, April 2006.
[2] Y. Saito, Y. Kishiyama, A. Benjebbour, T. Nakamura, A. Li, and K. Higuchi, “Nonorthogonal multiple access (NOMA) for cellular future radio access,” in IEEE VTC, pp. 1–5, June 2013. [3] 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, pp. 1616–1626, Apr. 2008. [4] H. Nikopour and H. Baligh, “Sparse code multiple access,” in 2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), pp. 332–336, Sept 2013. [5] Y.-C. Lin, Multilevel Detection for Multiple Access Systems. Graduate Institute of Communication Engineering National Taiwan University Master Thesis, 2017. [6] M. C. Davey and D. J. C. MacKay, “Low density parity check codes over GF(q),” in Information Theory Workshop, pp. 70–71, June 1998. [7] F. R. Kschischang, B. J. Frey, and H. A. Loeliger, “Factor graphs and the sumproduct algorithm,” IEEE Transactions on Information Theory, vol. 47, pp. 498– 519, Feb. 2001. [8] E. Arikan, “Channel polarization: A method for constructing capacity-achieving codes for symmetric binary-input memoryless channels,” IEEE Transactions on Information Theory, vol. 55, pp. 3051–3073, July 2009. [9] D. Wubben and Y. Lang, “Generalized sum-product algorithm for joint channel decoding and physical-layer network coding in two-way relay systems,” in IEEE Globecom Proceedings, Miami, Florida, USA, pp. 1–5, Dec. 2010. [10] H. Li and J. Yuan, “A practical construction method for polar codes in awgn channels,” in IEEE 2013 Tencon - Spring, pp. 223–226, April 2013. [11] I. Tal and A. Vardy, “List decoding of polar codes,” IEEE Transactions on Information Theory, vol. 61, pp. 2213–2226, May 2015. [12] A. Shokrollahi, “Raptor codes,” IEEE Transactions on Information Theory, vol. 52, pp. 2551–2567, June 2006. [13] A. Goldsmith, Wireless communications. Cambridge University Press, 2005. [14] R. Mori and T. Tanaka, “Performance of polar codes with the construction using density evolution,” IEEE Communications Letters, vol. 13, pp. 519–521, July 2009. [15] David J.C. MacKay, “Encyclopedia of Sparse Graph Codes.” [16] R. Wang and R. Liu, “A novel puncturing scheme for polar codes,” IEEE Communications Letters, vol. 18, pp. 2081–2084, Dec 2014. [17] S. H. Kuo, Y. L. Guan, S. K. Lee, and M. C. Lin, “A design of physical-layer raptor codes for wide snr ranges,” IEEE Communications Letters, vol. 18, pp. 491–494,March 2014. [18] S. Jayasooriya, M. Shirvanimoghaddam, L. Ong, and S. J. Johnson, “Analysis and design of raptor codes using a multi-edge framework,” IEEE Transactions on Communications, vol. 65, pp. 5123–5136, Dec 2017. [19] S. ten Brink, G. Kramer, and A. Ashikhmin, “Design of low-density parity-check codes for modulation and detection,” IEEE Transactions on Communications, vol. 52, pp. 670–678, April 2004. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/70636 | - |
dc.description.abstract | 多重接取技術對於多個使用者在相同頻帶上傳送資料是很重要的技術。為了使接收端可以將每一個使用者訊號區分出來,每一個使用者必須給予一個獨特的特簽。在本篇論文將探討使用多階檢測(Multi-Level DeTection,或稱 MLDT)技術。在多個使用者傳送訊號,經過各自的衰落通道,利用不同的通道增益來區分使用者。本論文考慮Rayleigh衰落通道。我們推導出具close-form未編碼MLDT錯誤率的分析。針對Coded MLDT系統,我們考慮低密度奇偶檢查碼(LDPC)以及極化碼(Polar Code) 。我們也推導出雙使用者的通道容量的分析。並且以Raptor coded MLDT的模擬結果與雙使用者的通道容量做比較。為了對抗多重路徑干擾,MLDT也可以與多載波直接序列分碼多重進接(MC-DS-CDMA)結合,結合後使用者可使用相同的序列來傳送訊號,因此最大使用者數量可提升為原本的倍數,在此系統下我們也作了Coded的模擬。最後我們發現使用MLDT技術在使用者數提高後會犧牲掉些許錯誤率,但在某些情境下錯誤率的劣化是很小的,這是個顯著的優點。 | zh_TW |
dc.description.abstract | Multiple access techniques are essential for multiple users to share the same bandwidth. For receivers to separate out the message of the desired user, a unique signature for each user is needed. In this thesis, we study a technique called Multi-Level DeTection(MLDT) for multiple access over independent fading channels. Rayleigh fading channels are considered here. For MLDT, each user employs its channel gain which is likely to be unique to distinguish users. We provide a close-form BER analysis for the uncoded MLDT. For coded cases, both LDPC coded MLDT and polar coded MLDT are considered. We also provide capacity analysis for the two-user coded MLDT. Raptor coded MLDT are simulated to compare with the capacity. To combat the multipath fading channels, MLDT can be applied to the MC-DS-CDMA system. As a summary, we found that using MLDT technique cost some BER performance degradation when number of users increase, but in some scenario the degradation only slight, this is significant advantage. | en |
dc.description.provenance | Made available in DSpace on 2021-06-17T04:33:20Z (GMT). No. of bitstreams: 1 ntu-107-R05942106-1.pdf: 1507660 bytes, checksum: d2aacb1651e629949d134f1e0a1569ed (MD5) Previous issue date: 2018 | en |
dc.description.tableofcontents | 口試委員會審定書 i
誌謝ii 中文摘要iii Abstract iv Contents v List of Figures viii List of Tables x 1 Introduction 1 2 MLDT scheme and BER analysis 5 2.1 MLDT scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1.1 MLDT receiver . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1.2 Multi-level Detection . . . . . . . . . . . . . . . . . . . . . . . 6 2.2 MLDT BER analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2.1 P = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.2.2 P = 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.2.3 P = 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.2.4 Compare to senior method . . . . . . . . . . . . . . . . . . . . 11 2.2.5 Simulation results . . . . . . . . . . . . . . . . . . . . . . . . 12 2.2.6 Numerical analysis . . . . . . . . . . . . . . . . . . . . . . . . 12 3 Coded MLDT and it’s Capacity analysis 14 3.1 Coded MLDT scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.1.1 LDPC coded MLDT using SPA decoder . . . . . . . . . . . . . 15 3.1.2 LDPC coded MLDT using GSPA decoder . . . . . . . . . . . . 15 3.1.3 Polar codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 3.1.4 Polar codes construct by LR-method . . . . . . . . . . . . . . . 22 3.1.5 Polar coded MLDT using SCL decoder . . . . . . . . . . . . . 28 3.1.6 Coded MLDT simulation result . . . . . . . . . . . . . . . . . 28 3.2 Capacity Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 3.2.1 Raptor-Coded System . . . . . . . . . . . . . . . . . . . . . . 35 4 Coded MLDT apply to MC-DS-CDMA system 39 4.1 Syetem model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 4.2 LDPC coded MLDT in MC-DS-CDMA using inter SPA decoder . . . . 43 4.3 Polar coded MLDT in MC-DS-CDMA using SCL decoder . . . . . . . 44 4.4 Simulation Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 5 Conclusion 50 Bibliography 51 | |
dc.language.iso | en | |
dc.title | 適用於傳送在獨立的衰弱通道之多重接取 | zh_TW |
dc.title | Multiple Access for Transmissions Over Independent Fading
Channels | en |
dc.type | Thesis | |
dc.date.schoolyear | 106-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 蘇賜麟,呂忠津,趙啟超,蘇育德 | |
dc.subject.keyword | 多重進接,分碼多重進接,多載波直接序列分碼多重進接,衰落通道,極化碼,通道容量, | zh_TW |
dc.subject.keyword | Multiple access,CDMA,MC-DS-CDMA,Fading channel,Polar code,Capacity, | en |
dc.relation.page | 53 | |
dc.identifier.doi | 10.6342/NTU201802804 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2018-08-10 | |
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 |
顯示於系所單位: | 電信工程學研究所 |
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