近年來，行動用戶端的位置追蹤多應用方面越來越受重視，應用也日益廣泛，比如行車定位，用戶位置管理等。在這篇論文中，我們研究基於多個基地台和行動用戶端之間訊號強度衰減之行動用戶位置追蹤技術。為符合實際無線傳輸環境，我們考慮具有位置相關性的遮蔽效應，並根據此效應及合理的用戶移動行為模型，提出基於擴展式卡曼濾波器之用戶位置追蹤技術。由模擬結果我們可以發現，相較於傳統最小平方追蹤技術，我們提出之技術不僅具有更好的追蹤效能，亦有較低的複雜度。

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