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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 蘇炫榮 | |
| dc.contributor.author | Chun-Chi Chen | en |
| dc.contributor.author | 陳俊奇 | zh_TW |
| dc.date.accessioned | 2021-06-13T15:17:31Z | - |
| dc.date.available | 2011-07-27 | |
| dc.date.copyright | 2008-07-27 | |
| dc.date.issued | 2008 | |
| dc.date.submitted | 2008-07-25 | |
| dc.identifier.citation | [1] J. Andrews, A. Ghosh, and R. Muhamed, Fundamentals of WiMAX. Boston/Toronto/Paris: Prentice Hall, 2006.
[2] W. Forum, “Mobile wimax - part i: A technical overview and perfor- mance evaluation,” in White Paper: Mobile WiMAX Overview and Performance , Aug 2006. [3] J. Lee, R. Arnott, K. Hamabe, and N. Takano, “Adaptive modulation switching level control in high speed downlink packet access transmis- sion,” in Third International Conference on 3G Mobile Communication Technologies., no. 489, May 2002, pp. 156–159. [4] D. Takeda, Y. Chow, P. Strauch, and H. Tsurumi, “Threshold con- trolling scheme for adaptive modulation and coding system,” in Personal, Indoor and Mobile Radio Communications.15th IEEE International Symposium, vol. 2, Sept. 2004, pp. 1351–1355. [5] Peebles and P. Z, Probability, random variables, and random signal principles . New York: McGraw-Hill, 1980. [6] J.-H. Wang, “Multi-user detection techniques in multi-antenna sys- tems,” Master’s thesis, National Taiwan University, 2004. 61 [7] S. Lin and D. J. Costello, Error Control Coding, 2nd ed. United States: Prentice Hall, 2004. [8] D. Porat, “White paper: Incremental redundancy,” in Communication and Signal Processing Ltd., July 2002. [9] A. Das, F. Khan, and S. Nanda, “An asynchronous and adaptive harq scheme for 3g evolution,” in IEEE VTC, Spring 2001. [10] 3GPP-TSGR17(001359), “Adaptive modulation and coding(amc),” Oct 2000. [11] A. Das, F. Khan, A. Sampath, and H.-J. Su, “Aaptive, asynchronous incremental redundancy(a2ir) with fixed transmission time(tti) for hs- dpa,” in IEEE International Symposium on Personal Indoor and Mobile Communication, 2002, pp. 1088–1091. [12] 3GPP-TSGR18(010079), “Variable tti proposal for hsdpa,” Jan 2001. [13] H.-J. Su and L.-W. Fang, “A simple adaptive throughput maximization algorithm for adaptive modulation and coding systems with hybrid arq,” in International Symposium on Communications. Control and Signal Processing., 2006. [14] L.-W. Fang, “Adaptive throughput maximization for adaptive modula- tion and coding in ieee 802.16,” Master’s thesis, National Taiwan Uni- versity, 2005. [15] L. Nuaymi, WiMAX: Technology for Broadband Wireless Access. France: John Wiley and Sons, 2007. 62 [16] D. Takeda, Y. Chow, P. Strauch, and H. Tsurumi, “Threshold control- ling scheme for adaptive modulation and coding system,” IEICE Trans. COMMUN, vol. E89-B, no. 5, May 2006. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/36983 | - |
| dc.description.abstract | For data transmission services, adaptive transmission can enhance the throughput performance by adjusting modulation and coding schemes (MCS) according to the instantaneous channel conditions. In time-varying channels, the performance degradation of adaptive transmission caused by delay or inaccurate channel condition feedback can be mitigated with the use of hybrid automatic repeat request(HARQ). With these two techniques jointly implemented, the selection of MCS becomes a complex process highly dependent on channel and system characteristics, and is usually difficult to be optimized. In this thesis, we propose an adaptive throughput maximization algorithm that can dynamically adjust the thresholds depending on feedback SNR and increase the overall throughput performance. When transmission time interval (TTI) varies, throughput performance can be further enhanced by allowing users with better channel conditions to transmit longer periods. The proposed algorithm with variable TTI is also discussed in this thesis. The algorithm is simulated in IEEE 802.16 platform. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-13T15:17:31Z (GMT). No. of bitstreams: 1 ntu-97-R95942125-1.pdf: 693154 bytes, checksum: 6dde0c0b838a5ea97f61db01068c7f13 (MD5) Previous issue date: 2008 | en |
| dc.description.tableofcontents | Contents
1 Introduction…………………………………………………………6 1.1 Background to WiMAX Evolution ………………………………6 1.2 Thesis Motivation ………………………………………………8 1.3 Thesis Outline……………………………………………………9 2 Wireless Channels…………………………………………………11 2.1 AWGN Channel ……………………………………………………11 2.2 Rayleigh Fading Channel………………………………………12 3 Hybrid ARQ …………………………………………………………14 3.1 Automatical Repeat Request (ARQ) …………………………14 3.2 HARQ ………………………………………………………………17 3.2.1 Chase Combining………………………………………………18 3.2.2 Incremental Redundancy (IR)………………………………19 3.3 Synchronous/Asynchronous HARQ………………………………20 4 Adaptive Modulation and Coding (AMC) ………………………23 4.1 Concept of AMC …………………………………………………23 4.2 CRC Based MCS Selection Method ……………………………24 4.3 Threshold Controlling Scheme for AMC ……………………26 4.4 Non-adaptive and Adaptive Modes……………………………30 5 Throughput Maximization Algorithm (TMA)……………………31 5.1 Fixed and Variable TTI ………………………………………32 5.2 TMA with Non-Adaptive Mode and Fixed TTI ………………33 5.2.1 MCS Selection Policy for Non-adaptive Mode …………35 5.2.2 Simulation Results of Non-Adaptive Mode………………36 5.3 Threshold Band Size Definition ……………………………38 5.3.1 Fixed Threshold Band Size Approach ……………………40 5.3.2 Variable Threshold Band Size Approach…………………42 5.3.3 Simulation Results of Different TB Approaches………43 5.4 Design of Step Size……………………………………………45 5.5 TMA with Adaptive Mode and Fixed TTI ……………………45 5.5.1 ACK Weighting for Selection Policy ……………………46 5.5.2 MCS Selection Policy of Adaptive Mode…………………48 5.5.3 Simulation Results of Adaptive Mode …………………49 5.6 TMA with Adaptive Mode and Variable TTI…………………50 5.6.1 Simulation Results of TMA with Variable TT …………54 6 Conclusion and Future Work ……………………………………59 6.1 Conclusion ………………………………………………………59 6.2 Future Work………………………………………………………60 Bibliography …………………………………………………………61 | |
| dc.language.iso | en | |
| dc.subject | 訊雜比 | zh_TW |
| dc.subject | 混合式自動重傳機制 | zh_TW |
| dc.subject | 動態調變編碼 | zh_TW |
| dc.subject | 傳輸量最大化 | zh_TW |
| dc.subject | 實體層 | zh_TW |
| dc.subject | AMC | en |
| dc.subject | Physical Layer | en |
| dc.subject | SNR | en |
| dc.subject | Throughput Maximization | en |
| dc.subject | HARQ | en |
| dc.title | 實體層動態調變編碼和混合式自動重傳機制的最佳化演算法 | zh_TW |
| dc.title | Adaptive Throughput Maximization Algorithm with Hybrid ARQ in Physical Layer | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 96-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 謝宏昀,葉丙成,易志孝 | |
| dc.subject.keyword | 混合式自動重傳機制,動態調變編碼,傳輸量最大化,實體層,訊雜比, | zh_TW |
| dc.subject.keyword | HARQ,AMC,Throughput Maximization,Physical Layer,SNR, | en |
| dc.relation.page | 63 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2008-07-25 | |
| 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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|---|---|---|---|
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