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題名 | 應用模糊理論來改善人體遮蔽效應對室內定位效能之研究--以Wi-Fi環境為例=A Study to Improve Body Shadowing for Indoor Positioning by Using Fuzzy Logic: The Case of Wi-Fi Environment |
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作者 | 錢為任; 錢逸; 邱弘毅; | 書刊名 | 新新科技年刊 |
卷期 | 11 2015.01[民104.01] |
頁次 | 頁273-280 |
分類號 | 448.6 |
關鍵詞 | 適地性服務; 無線區域網路; 模糊邏輯; LBS; WLAN; Fuzzy logic; |
語文 | 中文(Chinese) |
中文摘要 | 隨著無線通訊的發展,以網路作為定位之適地性服務(Location Based Service, LBS)日漸受到青睞,使得IEEE 802.11 無線區域網路(WLAN)系統為定位基礎之研究也慢慢普及化。以室外GPS定位服務為例,常被應用於行車的導航與路徑規劃。其主要是利用接收3顆以上之GPS衛星,經由三角定位原理求得使用端GPS接收器的所在位置;但GPS接收器必須與衛星間保持在無障礙的目視直線(Line Of Sight, LoS)狀態下,才能有效提供定位之準確性。而在室內定位技術中,以Microsoft實驗室在西元2000年所提出的RADAR(Radio Detection and Ranging)系統較為著稱,此研究可應用於無線區域網路(Wi-Fi)對行動端之追蹤與定位服務,其主要是根據在實驗環境中所接收到的Wi-Fi訊號強度,進行訊號紋的特徵樣式比對,以計算出行動端的所在位置。故本研究提出在Wi-Fi環境下,將探討人體遮蔽效應與訊號衰減之補償校正,並使用模糊邏輯分群法則來改善定位之精確度,最後,經實驗結果得知誤差距離最佳可達1.544公尺。 |
英文摘要 | As time goes on, the wireless communication network develops quickly and thereforethe Location-Based Service (LBS) becomes popular issue gradually, makes the IEEE 802.11wireless local area network system based positioning researches gradually getting morepopular. Outdoor position systems are used to apply the GPS for the navigation of vehicle andscheming routes. The main way of these is with receiving signals from three or more satellitesto obtain user's location through triangulation principle. Nevertheless it's necessary to keep thesatellite in Line-of-Sight (LoS) to perform effectively and accurate localization. The MicrosoftLaboratory proposed the RADAR (Radio Detection and Ranging) system in 2000 which isoutstanding technique in the region of indoor position and this research can be applied toWireless LAN (Wi-Fi) for following the trail of user and the location service. In this study, wewill focus on the shadowing effect of human body, the compensation of signal attenuation, andusing the fuzzy logic clustering to improve localization accuracy in the Wi-Fi environment.Eventually, the average error distance of this experiment can be reached within 2 meters. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。