動態解碼轉傳結合網路編碼在多個中繼站下之中繼站選擇與分析

The Relay Selection of Dynamic Decode and Forward Protocol With Cooperative Network Coding System

賴志銘(Chih-Ming Lai)

指導教授 ： 劉維正

國立中正大學/工學院/通訊工程學系/碩士(2013年)

摘要

合作式通訊(cooperative communications)是近年相當熱門的研究領域，在新一代無線通訊系統中占有相當重要的地位。網路編碼則是將多個傳送端傳來的訊號經由編碼的技術結合後傳輸至下一個接收端，能有效的提供傳輸效率。本論文將建構一個無線通訊系統，由動態解碼轉傳(Dynamic Decode and Forward, DDF)協定結合網路編碼，考慮在多個中繼站下，如何選擇適當的一個中繼站,並且分析雷利(Rayleigh Fading Channel)、萊斯(Rician Fading Channel)、仲上(Nakagami Fading Channel)三種無線通道下的中斷情形。並且推導此系統的中斷機率之理論值，並且將此理論值和模擬值做比較看是否符合。經過模擬與分析後發現此系統在網路編碼階段是否成功傳輸，將是影響整體中斷機率的最主要因素，並且了解有越多的中繼站可供選擇，則系統的中斷機率也有顯著的下降。

關鍵字

網路編碼 ； 動態解碼轉傳 ； 合作式通訊 ； 中斷機率 ； 中繼站

並列摘要

Cooperative communication is a very popular research area, and it plays an important role in the new generations of wireless communications. Network coding technology combines several messages, and transmit the mixed messages into next receiver for providing higher transmitting throughput and performance. This thesis builds a wireless communication system combined with dynamic decode and forward (DDF) and network coding technology. We consider the situation when the system has multiple relays, how to select a proper relay? We research outage probability of this system under Rayleigh, Rician and Nakagami fading channels. We choose a single relay to transmit, and derive the theoretical value of outage probability. Last, we compare theoretical value with simulation result. After simulation and analysis, we find whether the system can transmit successfully in the network coding stage is the main factor in affecting outage probability, and we know when we get more relays, outage probability is lower.

並列關鍵字

network coding ； dynamic decode and forward ； Cooperative communications ； outage probability ； relay

參考文獻

[1]A. Nosratinia, T. E. Hunter, and A. Hedayat, “Cooperative Communication in

Oct. 2004.

[2]G. Kramer, M. Gastpar, and P. Gupta, “Cooperative Strategies and Capacity

cooperative communication protocols for the half duplex fading relay channel ,”

[4]K. R. Kumar, G. Caire, "Coding and Decoding for the Dynamic Decode and