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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/27042完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 葉丙成 | |
| dc.contributor.author | Che-Hung Su | en |
| dc.contributor.author | 蘇哲弘 | zh_TW |
| dc.date.accessioned | 2021-06-12T17:54:21Z | - |
| dc.date.available | 2013-02-19 | |
| dc.date.copyright | 2008-02-19 | |
| dc.date.issued | 2008 | |
| dc.date.submitted | 2008-02-04 | |
| dc.identifier.citation | [1] M. Ahmed, H. Yanikomeroglu, and S. Mahmoud, “Fairness of link adaptation techniques in broadband wireless access networks,” IEEE Vehicular Technology Conference, Vol. 4, May. 2004.
[2] M. Ahmed, H. Yanikomeroglu, and S. Mahmoud, “Fairness enhancement of link adaptation techniques in wireless access networks,” IEEE Vehicular Technology Conference, Vol. 3, pp. 1554-1557, Oct. 2003, [3] S. Muneta, Y. Matsumoto, N. Mochizuki and M. Umehira, “A new frequencydomain link adaptation scheme for broadband OFDM systems,” IEEE Vehicular Technology Conference, Vol.1, pp. 253-257, Sept. 1999 [4] M.S. Alouini and A. Goldsmith, “Adaptive modulation over Nakagami fading channels,” Wireless Personal Communications, Vol. 13, May 2000. [5] A. Forenza and R.W. Heath, Jr., “Link adaptation and channel prediction in wireless OFDM systems,” 45th Midwest Symposium on Circuits and Systems, Vol. 3, pp. 211-214, Aug. 2002. [6] S. Catreux, D. Gesbert, V. Erceg and R. Heath, “Adaptive modulation and MIMO coding for broadband wireless data networks,” IEEE Communications Magazine, Vol. 40, pp. 108-115, June 2002. [7] S. Ramachandran, C.W. Bostian and S.F. Midkiff, “A link adaptation algorithm for IEEE 802.16”, IEEE Wireless Communications and Networking Conference, Vol. 3, pp. 1466-1471, March 2005. [8] N. Liu, D. Sun, W. Li and C. Pei, “A Link Adaptation Solution to IEEE 802.16d WMAN,” the Seventh International Conference on Parallel and Distributed Computing, Applications and Technologies, pp. 29-32, Dec. 2006. [9] L. Juan and S.G. Haggman, “Performance of IEEE802.16-2004 based system in jamming environment and its improvement with link adaptation,” Personal, Indoor and Mobile Radio Communications, 2006 IEEE 17th International Symposium, pp. 1-5, Sept. 2006. [10] L. Juan and S.G. Haggman, “Performance Improvement of IEEE802.16-2004 System in Jamming Environment via Link Adaptation,” Military Communications Conference, 2006. MILCOM 2006, pp. 1-6, Oct. 2006. [11] Y.T. Yu and H.L. Chao “A Cross-Layer Approach of Link Adaptation in IEEE 802.16 Broadband Wireless Access Systems,” Wireless Communications, Networking and Mobile Computing, 2007, pp 1958-1961, Sept. 2007. [12] G. Zhenyuan, F. Zesong, K. Jingming and W. Lei, “Rate-Compatible Schemes for Link Adapted LDPC Codes in IEEE 802.16e Standard,” Vehicular Technology Conference, pp. 3155-3159, April 2007. [13] P. Trifonov, E. Costa, and E. Schulz, “Adaptive multilevel coding in OFDM systems,” IEEE Vehicular Technology Conference , Vol. 3, pp. 1566-1570, June 2005. [14] E.W. Weisstein, “Least Squares Fitting–Exponential.” From MathWorld–A Wolfram Web Resource. http://mathworld.wolfram.com/LeastSquaresFittingExponential.html [15] IEEE Std 802.16-2004 (Revision of IEEE Std 802.16-2001), “IEEE Standard for Local and Metropolitan Area Networks- -Part 16: Air Interface for Fixed Broadband Wireless Access Systems,” 2004 [16] S.J. Shellhammer, “A Method of Curve Fitting to BER Data,”http://www.ieee802.org/19/pub/2005/19-05-0042-01-0000-A-Method-of-Curve-Fitting-to-BER-Data.doc [17] D. Gluss and E.W. Weisstein, “Lagrange Multiplier,”From MathWorld–A Wolfram Web Resource. http://mathworld.wolfram.com/LagrangeMultiplier.html [18] L. Hanzo, M. Munster, B. J. Choi and T. Keller, “OFDM and MC-CDMA for broadband multi-user communications, WLANs, and broadcasting”, Wiley- IEEE Press, Sept. 2003. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/27042 | - |
| dc.description.abstract | 隨著科技的進步, 多媒體應用所需的傳輸速率愈來愈高。為了滿足各種多媒體應用的品質,通訊系統必須能夠動態調整傳輸速率。我們使用鏈結調整機制來訂定各種傳輸速率改變的依據。本篇論文的主旨在設計WiMAX 系統的鏈結調整機制。WiMAX 系統在burst profile
中設定多種編碼和調變的組合來提供各種傳輸的需求。我們以封包錯誤率的限制為基礎設計其鏈結調整機制。 論文首先介紹WiMAX 系統之實體層架構以及模擬WiMAX 系統封包錯誤率之參數。我們使用二段式曲線擬合近似此模擬之結果。接著,我們使用Lagrangian 方法設計鏈結調整機制。透過此設計, 我們可以找到切換burst profile的SNR 門檻值。同時, 我們更設計了使用自動重傳請求(ARQ) 和混合式自動重傳請求(HARQ) 的鏈結調整機制。我們發現使用重傳機制確實可將切換burst profile的SNR門檻值降低,進而有效提昇throughput。 | zh_TW |
| dc.description.abstract | As technology evolves, the development of multimedia applications demands high speed transmission. To satisfy various quality of services for multimedia applications,
communication systems must dynamically adjust the transmission rate. Link adaptation is applied to determine the transmission rate. The motivation of this thesis is to design link adaptation algorithm for WiMAX systems. WiMAX support various coding and modulation settings in different burst profiles that provide defferent transmission rates. We design the link adaptation algorithm to maximize the average throughput under the constraint of packet error rate threshold. In this thesis, we first introduce the physical layer of WiMAX system and the setup for WiMAX packet error rate simulation. We use double curve fitting to approximate the result of simulation. We can find the optimal SNR thresholds that maximize the average throughput. We also design the link adapatation for WiMAX with ARQ or HARQ. The resulting SNR thresholds of switching burst profiles are decreased which increase the average throughput. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-12T17:54:21Z (GMT). No. of bitstreams: 1 ntu-97-R94942125-1.pdf: 1048908 bytes, checksum: 2723722f715014c3c56f766381bb58e4 (MD5) Previous issue date: 2008 | en |
| dc.description.tableofcontents | 1 緒論 1
2 系統架構 3 2.1 WiMAX OFDM PHY 3 2.1.1 OFDM symbol 之簡介 3 2.1.2 通道編碼 4 2.2 模擬架構 8 2.3 曲線擬合 11 3 鏈結調整機制 14 3.1 Lagrangian 方法之簡介 14 3.2 Lagrangian方法之分析 15 3.3 模擬結果分析 18 4 ARQ及HARQ 下之鏈結調整機制 21 4.1 ARQ機制簡介 21 4.2 使用ARQ 之鏈結調整機制 22 4.3 HARQ機制簡介 24 4.4 使用HARQ 之鏈結調整機制 26 4.5 模擬結果分析與比較 29 5 結論 35 參考文獻 36 附錄 39 | |
| dc.language.iso | zh-TW | |
| dc.title | IEEE802.16鏈結調整演算法之設計 | zh_TW |
| dc.title | Link Adaptation Algorithm Design for IEEE 802.16 | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 96-1 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 謝宏昀,魏宏宇,周俊廷 | |
| dc.subject.keyword | WiMAX,burst profile,封包錯誤率,鏈結調整機制,曲線擬合,自動重傳請求, | zh_TW |
| dc.subject.keyword | WiMAX,burst profile,packet error rate,link adaptation,curve fitting, | en |
| dc.relation.page | 39 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2008-02-04 | |
| 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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