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研究生:李偉嘉
研究生(外文):Li, Wei-Chia
論文名稱:無線感測網路中利用多重階段分散式檢測法之節能研究
論文名稱(外文):Multi-stage Distributed Detection for Energy-saving in Wireless Sensor Networks
指導教授:蔡育仁蔡育仁引用關係
指導教授(外文):Tsai, Yuh-Ren
口試委員:洪樂文吳卓諭蔡育仁
口試日期:2011-7-28
學位類別:碩士
校院名稱:國立清華大學
系所名稱:通訊工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2011
畢業學年度:99
語文別:英文
論文頁數:48
中文關鍵詞:無線感測網路節能多重階段檢測法感測網路耗能階段門檻值
相關次數:
  • 被引用被引用:0
  • 點閱點閱:168
  • 評分評分:
  • 下載下載:1
  • 收藏至我的研究室書目清單書目收藏:0
在這篇論文中,我們處理的是一個在無線感測網路中的檢測問題。無線感測網路包含一個資料匯集中心與許多的感測器。我們將傳統的檢測問題分成多個階段提出多重階段分散式檢測法,利用每階段所需要不同數目的感測器和每階段不同的門檻來達到節省無線感測網路耗能的效果。
我們考慮每個感測器會將接收到的訊號進行初級的檢測做出一個初級決策,這個初級決策的結果會受到觀測通道的可加性高斯白雜訊影響有可能會產生初級決策的錯誤,每個感測器會根據多重階段分散式檢測法由資料匯集中心通知是否將自己的初級決策經由一個理想通道傳送至資料匯集中心。
我們的目標是希望在我們可接受的檢測錯誤要求之下降低我們的平均傳送次數(平均傳送次數與系統傳輸耗能成正比),為了達到此目的我們必須利用最佳化問題計算出每一個階段所需要的感測器數目和門檻值,我們討論的兩種檢測錯誤要求來去限制提出的方法:檢測錯誤率要求以及假警報機率要求。
在最後的結果我們可以看到在我們提出的多重階段分散式檢測法可以有效的降低系統耗能,尤其是在低訊雜比的情況更是明顯,而即使是在高訊雜比的情況也能維持與傳統方法一樣的耗能,簡而言之,我們提出了一個可行的檢測法來有效的降低無線感測網路中的耗能達到節能的效果。

Contents
Chapter 1 Introduction 1
Chapter 2 System Model 4
2.1 Sensing Model 4
2.2 Decision Rule 6
Chapter 3 Multi-Stage Detection in Wireless Sensor Networks with Two Stages Case 8
3.1 One Stage Decentralized Scheme 8
3.2 Two Stages Decentralized Scheme 12
3.3 Error Probability Constrained Scenario 18
3.4 False Alarm-Detection Probability Constrained Scenario 19
3.5 Numerical and Simulation Result 20
Chapter 4 Multi-Stage Detection in Wireless Sensor Networks with Three Stages Case 25
4.1 Three Stages Decentralized Scheme 25
4.2 Error Probability Constrained Scenario 29
4.3 False Alarm-Detection Probability Constrained Scenario 30
4.4 Numerical and Simulation Result 31
Chapter 5 Conclusion 38
Appendix 40
Bibliography 46

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