基於有限狀態馬可夫通道模型於合作式通訊系統之研究

Studies on Cooperative Communications with FSMC Modeling

蘇宇軒(Yu Hsuan Su)

指導教授 ： 李彥文

國立暨南國際大學/科技學院/通訊工程研究所/碩士(2010年)

摘要

本論文研究之目的是應用有限狀態馬可夫通道模型(Finite-State Markov Channel, FSMC)，分析在不同衰落通道下合作式通訊系統的效能，先討論在中上衰落通道(Nakagami-m Fading Channel)中不同分集合成方式，並推導出快速分析之參數，將有限狀態馬可夫通道模型套用到合作式通訊系統(Cooperation Communication System)，模擬分析使用解調後傳送(Decode and Forward , DF)的合作式通訊系統的位元錯誤率(Bit Error Rate)，最後利用有限狀態馬可夫通道模型分析在雙重中上衰落通道(Double Nakagami-m Fading Channel)的情況，雙重中上衰落通道為傳送端和接收端皆在移動的情況(Mobile-to-Mobile Communication, M2M)，利用有限狀態馬可夫通道模型的概念，找出接收端雜訊比(Signal-to-Noise Ratio, SNR)的範圍，並切出數個不等的狀態，快速分析合作式通訊系統在衰落通道為雙重中上衰落情況下的位元錯誤率及效能。

關鍵字

有限狀態馬可夫模型 ； 合作式通訊系統 ； 雙重中上衰落通道

並列摘要

The aim of this thesis is to investigate the use of the finite state Markov channel (FSMC) model for analyzing the performance of cooperative communications over different fading channel environments. First, we discuss the case of different combining techniques in the ordinary Nakagami-m fading channel, and derive the necessary parameters used in the FSMC modeling process. Then, we employ the resultant FSMC model to analyze the performance of a cooperative communication system. The bit error rate (BER) with the decode-and-forward (DF) protocol is simulated through the derived model. After that, we also apply the FSMC model to examine the double Nakagami-m fading channel. This double Nakagami-m fading formulation is suitable for describing the mobile-to-mobile (M2M) communication scenario. With the FSMC model, we can obtain the range of the signal-to-noise ratio (SNR) and a number of states with different probabilities. We show that the FSMC model can successfully describe the double Nakagami-m fading channel as well, and can provide a fast simulation of the resultant BER performance in cooperation.

並列關鍵字

Finite-state Markov channel ； Cooperative communication system ； Double Nakagami-m fading channel

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