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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 林茂昭 | |
| dc.contributor.author | Ying-Chen Lin | en |
| dc.contributor.author | 林穎塵 | zh_TW |
| dc.date.accessioned | 2021-06-17T01:30:05Z | - |
| dc.date.available | 2017-08-08 | |
| dc.date.copyright | 2017-08-08 | |
| dc.date.issued | 2017 | |
| dc.date.submitted | 2017-08-04 | |
| dc.identifier.citation | [1] K.-C. Cheng, “Multiple Access Desgins for Some Users with Identical Signatures,”July. 2016. [2] J. G. Andrews, S. Buzzi, W. Choi, S. V. Hanly, A. Lozano, A. C. K. Soong, and J. C. Zhang, “What will 5G be?,” IEEE J. Select. Areas Commun., vol. 32, pp. 1065–1082, June 2014. [3] L. Dai, B. Wang, Y. Yuan, S. Han, C. l. I, and Z. Wang, “Non-orthogonal multiple access for 5G: solutions, challenges, opportunities, and future research trends,”IEEE Communications Magazine, vol. 53, pp. 74–81, Sep. 2015. [4] 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. [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, pp. 1616–1626, Apr. 2008. [6] H. Nikopour and H. Baligh, “Sparse code multiple access,” pp. 332–336, Sep. 2013. [7] D. Wubben and Y. Lang, “Generalized sum-product algorithm for joint channel decoding and physical-layer network coding in two-way relay systems,” pp. 1–5, Dec. 2010. [8] 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. [9] 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. [10] K. Fazel and S. Kaiser, Multi-carrier and spread spectrum systems: from OFDM and MC-CDMA to LTE and WiMAX. Wiley, 2nd edition ed., Oct. 2008. [11] Berrou C. and Glavieux A., “Near optimum error correcting coding and decoding: Turbo codes,” IEEE Trans. Commun., vol. 44, pp. 1261–1271, Oct. 1996. [12] K. Y. W. L. Ping, L. Liu and W. K. Leung, “Interleave-division multiple-access (idma) communications,” in Proc. 3rd International Symposium on Turbo Codes and Related Topics. [13] X.Wang and H. V. Poor, “Iterative (turbo) soft interference cancellation and decoding for coded cdma,” IEEE Trans. Commun., vol. 47, 1999. [14] C. R. M. N. Oliver and S. Zhenning, “Performance analysis of a generic system model for uncoded idma using serial and parallel interference cancellation,” Eur. Trans. Telecommun., vol. 19. [15] David J.C. MacKay, “Encyclopedia of Sparse Graph Codes.”[16] A. Goldsmith, Wireless communications. Cambridge University Press, 2005. [17] E. H. Dinan and B. Jabbari,“Spreading codes for direct sequence CDMA and
wideband CDMA cellular networks,” IEEE Communications Magazine, vol. 36, pp. 48–54, Sep. 1998. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/67384 | - |
| dc.description.abstract | 在本篇論文中，我們處理在多重接取系統下，某些使用者使用相同簽記(signature)時，會造成接收端無法正確得解出使用者的訊息，直接地影響系統下整體的吞吐量之問題，我們稱之為碰撞。首先，會回顧兩種多重接取系統的技術，分別為分碼多重接取系統(CDMA)以及交織多重接取系統(IDMA)，在分碼多重接取系統下使用者使用專屬的展頻碼做為簽記，而在交織多重接取系統下使用者是採用不同的交織器為簽記。我們會回顧前一屆的碩士論文中將交織多工接取系統的接收端結合廣義信道解碼聯合實體層網路編碼技術，來處裡碰撞的問題，雖然能有效的解決問題，但推論與預設環境還不夠完備，我們會在推廣到多個通道上，以及轉到頻域上傳送的情況，還有更詳細的推導。 | zh_TW |
| dc.description.abstract | In this thesis, we deal with the problem in the multiple access system that when many users transmit messages simultaneously, there are possibilities that some users use the same signatures. We call this condition as collision in this thesis. While the collision occurs, the system cannot successfully decode the users' messages and the performance is severely affected. We fist review two multiple access systems, Code Division Multiple Access(CDMA) and Interleave Division Multiple Access(IDMA). In a CDMA system, each user use a unique spreading code for signature. In a IDMA system, the signature is a user-specific interleaver.
Multilevel Detection(MLDT) is a scheme which can recover the collision users’ messages successfully with little performance degradation. In this thesis we review the MLDT from [1] and derive the performance analysis of MLDT over the Rayleigh fading channel. Moreover, we extend the study of MLDT to the multipath fading channel and the multicarrier scenarios. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-17T01:30:05Z (GMT). No. of bitstreams: 1 ntu-106-R04942118-1.pdf: 1401235 bytes, checksum: 8ca1463be408520f73f9a24f7613fd6f (MD5) Previous issue date: 2017 | en |
| dc.description.tableofcontents | 1 Introduction 1
2 Review of CDMA and IDMA 4 2.1 CDMA System Model . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1.1 Transmitter of CDMA . . . . . . . . . . . . . . . . . . . . . . 4 2.1.2 Receiver of CDMA . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1.3 MC-DS-CDMA System Model . . . . . . . . . . . . . . . . . 6 2.2 IDMA System Model . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2.1 ESE Function for Real Single-Path Channel . . . . . . . . . . . 9 2.2.2 ESE Function for Complex Single-Path Channel . . . . . . . . 12 2.2.3 DEC Function . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.2.4 Simulation Results . . . . . . . . . . . . . . . . . . . . . . . . 17 3 Performance Analysis of MLDT 19 3.1 Bit Error Rate (BER) Analysis . . . . . . . . . . . . . . . . . . . . . . 19 3.2 Semi-Analytical BER of the LDPC-Coded MLDT Receiver . . . . . . . 23 4 Review of IDMA and CDMA Systems Using Multi-level detection 26 4.1 Implementation of IDMA Using MLDT . . . . . . . . . . . . . . . . . 27 4.1.1 Proposed ESE Function . . . . . . . . . . . . . . . . . . . . . 27 4.1.2 DEC Function . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4.2 Simulation Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 4.3 Implementation of CDMA Using MLDT . . . . . . . . . . . . . . . . . 34 4.3.1 System model . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 4.3.2 Receiver of CDMA using MLDT . . . . . . . . . . . . . . . . 36 4.3.3 DEC Function . . . . . . . . . . . . . . . . . . . . . . . . . . 40 4.4 Simulation Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 5 CDMA using MLDT over Multipath Fading Channel 43 5.1 Implementation of CDMA using MLDT over Multipath Fading Channel 43 5.2 Simulation Result . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 6 MC-DS-CDMA Using Multi-Level Detection 48 6.1 System Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 6.2 Simulation Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 7 Conclusions 54 Bibliography 55 | |
| dc.language.iso | en | |
| dc.subject | 交織多重接取系統 | zh_TW |
| dc.subject | 分碼多重接取系統 | zh_TW |
| dc.subject | 簽記 | zh_TW |
| dc.subject | 碰撞 | zh_TW |
| dc.subject | 多點偵測法 | zh_TW |
| dc.subject | Multi-level detection(MLDT) | en |
| dc.subject | Interleave division multiple Access (IDMA) | en |
| dc.subject | Code division multiple Access (CDMA) | en |
| dc.subject | Signature | en |
| dc.subject | Collision | en |
| dc.title | 適用於多重接取系統的多階檢測技術 | zh_TW |
| dc.title | Multilevel Detection for Multiple Access Systems | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 105-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 呂忠津,蘇育德,蘇賜麟,趙啟超 | |
| dc.subject.keyword | 交織多重接取系統,分碼多重接取系統,簽記,碰撞,多點偵測法, | zh_TW |
| dc.subject.keyword | Code division multiple Access (CDMA),Interleave division multiple Access (IDMA),Signature,Collision,Multi-level detection(MLDT), | en |
| dc.relation.page | 57 | |
| dc.identifier.doi | 10.6342/NTU201702309 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2017-08-04 | |
| 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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