A Novel Relay Selection Criterion for Decode-and-Forward(DF) Cooperative Communication Systems

合作式通訊網路系統在這個世紀逐漸的成為一種熱門研究方向，在合作式通訊網路系統當中，放大前送式還有解碼前送式是其中二個較為熱門的討論區域。 在這篇論文當中，我們在解碼與前送的這個系統下，基於我們所使用的正弦信號，提出一種新的上界來分析符號錯誤率的性能，從模擬圖當中，顯示出我們所提出的這個新的方法，比起另外二種系統 調合平均數法則 以及 最大最小選擇法 更能夠選出好的中繼器來傳送信號。Cooperative system network has been most popular in the generation. Among cooperative protocols, amplify- and-forward (AF) and decode-and-forward (DF) are the most popular ones. In this paper, we will first propose an upper bound on the SER performance of DF protocol based on the property of sinusoid function, this upper bound can reflect the SER relationships among relays, and we will compare the other selection criterion. The simulation result shows we proposed selection criterion is capable of selecting better relays than the harmonic mean and Ma-Min.1.Introduction 1 2.System Model 4 3.Proposed Relay Node Selection 6 3. 0.1. Application of the proposed upper bound to Multiple- relay environment . . . . . . . . . . 9 3. 0.2. Application of the proposed upper bound to the prediction of the decoding set . . . . . . . . . 10 4.Simulation Result 12 5.Conclusion 18 Bibliography 1