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題 名 | 近距離無線電波傳輸植被衰減模型之研究=A Study on Vegetation Fading Model of Short Range Radio Wave Propagation |
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作 者 | 黃揚智; 黃清錦; 張燦毅; | 書刊名 | 電腦與通訊 |
卷 期 | 149 2013.02[民102.02] |
頁 次 | 頁47-54 |
專 輯 | 智慧感測網路技術專題 |
分類號 | 448.6 |
關鍵詞 | 無線電波傳輸; 植被衰減; 傳輸路徑損耗; Radio wave propagation; Vegetation fading; Propagation path loss; PPL; |
語 文 | 中文(Chinese) |
中文摘要 | 目前已有數個植被衰減模型(Vegetation Fading Model)被提出用來評估無線電波傳輸衰減,包括Weissberger's Model, COST235 Model, Fitted ITU-R Model及Early ITU Model等。然而,這些衰減模型在不同林相會有少許偏差,不見得符合屬於亞熱帶林(Subtropical Forest)之臺灣丘陵地無線電波傳輸估測需求。此外,近距離無線電波傳輸也會有不同的傳輸路徑損耗須考量。所以本論文提出-推導植被衰減模型之範例,在新竹高峰植物園進行無線電波接收訊號強度(Received Signal Strength Indication)實地量測,並且探討100公尺以內之近距離2.45GHz無線電波傳輸路徑損耗,進而換算出植被衰減值,最後使用非線性迴歸(Nonlinear Regression)方法修正出的63公分天線高度之近距離2.45GHz無線傳輸使用之臺灣丘陵地植被衰減模型,以提供近距離2.45GHz無線感測網路佈建之參考。 |
英文摘要 | Several vegetation fading models have been proposed to estimate the radio wave propagation, including Weissberger's model, COST235 model, Fitted ITU-R model, and Early ITU model. However, these fading models have few deviations for different forests, and may not meet the requirements to Taiwan’s hills, which belong to subtropical forest. In addition, the 2.45GHz radio wave propagation in a short range will have different propagation path loss to be considered. Therefore, in this paper, we proposed an example for the derivation of the vegetation attenuation model. A realistic experiment for received signal strength indication (RSSI) has been performed at Gao-Fong Botanical Garden in Hsinchu, Taiwan, and a radio wave propagation path loss in a short range of 100 meter has been explored. Then, the measured data has been converted to vegetation fading values. Moreover, a nonlinear regression method has been applied to modify the developed fading model for 2.45GHz radio wave propagation with 63cm-high antenna in a short range. It is believed that the experimental results presented in this paper would benefit researchers in the short-range deployment of wireless sensor networks in Taiwan. |
本系統中英文摘要資訊取自各篇刊載內容。