臺灣博碩士論文加值系統

本論文研究之目的是找出有效的演算法，來模擬建構一個寬頻的衰減通道。無線通訊系統中不論是對於寬頻或者是極寬頻的衰減通道，我們不能使用傳統的通道模型來表示寬頻的衰減通道。當通道被視為寬頻通道時，通道衰減在時間和頻率上會產生區塊衰減效應。極寬頻的通道情況下，一個均勻的訊號在時域和頻域的使用上，並不能完整的被使用。利用找出上下限來決定頻寬範圍該有多大的方式，提供了分割頻寬時能有一個適合的範圍。在寬頻衰減通道時，對一個非常大的頻寬切割二次之後，每一個被切割後的頻寬使用有限狀態的馬可夫通道來描述。然後我們討論每個狀態的轉換機率和穩定機率。將接收到的訊雜比分割成有限各區間後，就能夠利用有限狀態馬可夫通道模型建立起寬頻的雷立衰減通道或是其他的衰減通道。

The objective of this study is to find an effective algorithm to build and model the broadband fading channel. For broadband or even ultra-broadband fading channels in the wireless communication system, we will not be able to describe them by a conventional channel model algorithm. There are block fading effects both in time and in frequency when the channel is considered to be a broadband fading channel. The uniform signal over time and frequency in the ultra-broadband channel does not achieve good channel utilization; we shall adopt bandwidth scaling to offer a suitable bandwidth range by combining the upper and lower channel capacity bounds to decide how large should be the bandwidth. Applying bandwidth scaling scheme twice for a very large bandwidth on ultra-broadband fading channels, we then be able to describe each bandwidth scaled broadband fading channel by a finite-state Markov channel (FSMC) model. We have discussed the transition probability and steady state probability of each state. By partition the range of the received signal-to-noise ratio (SNR) into a finite number of intervals, the finite-state Markov channel model can be applied to construct broadband Rayleigh fading channels as well as others broadband fading channels

第一章 緒論
1.1 研究背景和文獻分析
1.2 研究動機
1.3 研究方法
1.4 論文架構

第二章 有限狀態馬可夫通道
2.1 通道模型
2.2 Rayleigh 衰減通道與模型
2.2.1 Rayleigh衰減通道
2.2.2 通道模型

第三章 區塊衰減通道的延伸
3.1 通道容量的上限
3.2 通道容量的下限
3.3 通道延伸的上限與下限

第四章 系統模型
4.1 一層架構有限狀態馬可夫通道模型
4.1.1 通道模型
4.1.2 模擬與分析
4.2 二層架構有限狀態馬可夫通道模型
4.2.1 通道模型
4.2.2 模擬與分析
4.3 一層架構通道容量
4.3.1 通道模型
4.3.2 模擬與分析
4.4 二層架構通道容量
4.4.1 通道模型
4.4.2 模擬與分析
4.5 比較分析

第五章 結論與未來方向
5.1 結論
5.2 未來方向

[1]. H. S. Wang and N. Moayeri, “Finite-State Markov Channel-A
Useful Model for Radio Communication Channels”, IEEE Transactions on Vehicular Technology, Vol. 44, February 1995

[2]. H. S. Wang and N. Moayeri,”Modeling ,and Joint Source/Channel coding for Rayleigh Fading Channels” IEEE Transactions on Vehicular Technology,

[3]. M. Medard and D. N.C. Tse, “Spreading in Block-Fading Channels”, In Proc. Asilomar Conference, Signals, Systems and Computers, October 2000

[4]. M. Medard and R.G. Gallager, “Bandwidth Scaling for Fading Multipath Channels”, IEEE Transactions on Information Theory, Vol. 48, April 2002

[5]. M. Medard and R.G. Gallager, “Bandwidth Scaling for Fading Channels”，ISIT 1997，Ulm，Germany .June 29-July 4.