臺灣博碩士論文加值系統

針對子載波最適分配，我們提出一個新的動態通道調整機制，引用傳輸功率較佳之Zhang進行子載波初始化配置，並搭配一次進行多組子載波交換或移動的動態調整方式，模擬結果較原動態調整機制更能夠節省功率的輸出。

We quote Zhang’s subcarrier distributes method to establish initial subcarrier distribution. And double check if we exchange or shift more pair subcarriers at the same time, the transmit power decreasing degree can be more and fast. Simulation results show that if we use better subcarrier allocation at the beginning, and change more subcarriers at the same time if the power gain will be more. The needed final total transmit power will be less.

中文提要 ………………………………………………………… i
英文提要 ………………………………………………………… iii
誌謝 ………………………………………………………… iv
目錄 ………………………………………………………… v
圖目錄 ………………………………………………………… vi
表目錄 ………………………………………………………… vi
一、緒論
1.1 研究背景 ……………………………………………… 1
1.2 研究動機 ……………………………………………… 3
1.3 論文架構 ……………………………………………… 3
二、系統架構介紹
2.1 OFDM簡介 ……………………………………………… 4
2.2 系統模型參數設定 …………………………………… 6
2.3 通道模型介紹 ………………………………………… 8
三、既有之資源配置機制介紹
3.1 注水演算法 …………………………………………… 12
3.2 資源配置模型 ………………………………………… 12
3.2.1 系統模型參數 …………………………………… 12
3.2.2 資源配置問題 …………………………………… 14
3.3 動態通道配置機制 …………………………………… 15
3.3.1 初始化通道模型機制建立 …………………………15
3.3.2 Zhang多使用者初始化通道配置介紹………………19
3.3.3 動態通道配置機制-子載波交換 ………………… 25
3.3.4 動態通道配置機制-子載波移動 ………………… 27
四、動態通道配置機制修訂
4.1 動態通道配置機制修訂介紹 ………………………… 29
4.2 動態通道配置修訂演算法模擬測試 ………………… 32
4.2.1 模擬方式 ……………………………………………32
4.2.2 Wang’s CIA動態通道配置修訂機制模擬 ……… 34
4.2.3 Zhang’s CIA動態通道配置修訂機制模擬 ………34
五、初始化通道配置對動態調整之影響
5.1 前言 …………………………………………………… 36
5.2 模擬結果……………………………………………… 36
六、結論 ………………………………………………………… 38
6-1 未來方向 ……………………………………………… 38
參考文獻 ………………………………………………………… 39

﹝1﹞I. Kim, H. L. Lee, B. Kim, and Y. H. Lee, “On the Use of Linear Programming for Dynamic Subchannel and Bit Allocation in Multiuser OFDM,” IEEE GLOBECOM ''01. vol. 6, pp. 3648 -3652, 2001.
﹝2﹞Y. W. Cheong, R. S. Cheng, K. B. Lataief, and R. D. Murch, “Multiuser OFDM with Adaptive Subcarrier, Bit, and Power Allocation”, IEEE J. Selected Areas Comm., vol. 17, pp. 1747-1758, October 1999.
﹝3﹞C. Y. Wong, C. Y. Tsui, R. S. Cheng, and K. B. Letaief, “A real-time subcarrier allocation scheme for multiple access down load OFDM transmission,” in Proc. IEEE Vehicular Technology Conf. (VTC’99), vol. 2, pp. 1124-1128.
﹝4﹞Yung-Fang Chen, Jean-Wei Chen, "A Fast Subcarrier, Bit, and Power Allocation Algorithm for Multiuser OFDM-Based Systems," IEEE Transactions on Vehicular Technology, accepted for future publication.
﹝5﹞Guodong Zhang, “Subcarrier and bit allocation for real-time services in multiuser OFDM systems,” in Proc. IEEE Int. Conf. on Communications (ICC’04), vol. 5, pp. 2985-2989.
﹝6﹞T.S. Rappaport, “Wireless Communications”, Prentice-Hall, 1999.
﹝7﹞L. Dong, G Xu, and H. Ling, “Prediction of fast fading mobile radio channels in wideband communication systems”, IEEE GLOBECOM 01. vol. 6, pp. 3287-3291, 2001.
﹝8﹞P. S. Chow, J. M. Cioffi, and J. A. C. Bingham, “A practical discrete multitone transceiver loading algorithm for data transmission over spectrally shaped channels, “IEEE Trans. Commun., vol. 43, pp. 773-775, Feb. 1995.
﹝9﹞G. D. Forney Jr. and M. V. Eyuboglu. Combined Equalization and Coding Using Precoding. IEEE Communications Magazine, 29(12): 25-34, December 1991.