基於領域自適應及遷移學習之指紋室內定位;Fingerprint Indoor Localization Based on Domain Adaptation and Transfer Learning

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题名:	基於領域自適應及遷移學習之指紋室內定位;Fingerprint Indoor Localization Based on Domain Adaptation and Transfer Learning
作者:	陳祐麟;Chen, You-Lin
贡献者:	資訊工程學系
关键词:	領域自適應;信標;室內定位;自動編碼器;指紋定位法;遷移學習;domain adaptation;indoor localization;autoencoder;fingerprint localization;transfer learning
日期:	2022-08-16
上传时间:	2022-10-04 12:05:56 (UTC+8)
出版者:	國立中央大學
摘要:	指紋室內定位(fingerprint indoor localization)方法透過在不同位置的參考點(reference point)，接收事先佈置在特定位置之信標節點(beacon node)的信標(beacon)訊號，構成信標指紋(beacon fingerprint)以進行室內定位，具有不錯的定位精準度。為了改善不同定位訊號接收設備與不同定位區域間指紋定位的精準度，通常需要重新獲取新設備與新定位區域的信標訊號來進行定位資料校正。本論文提出基於領域自適應(domain adaptation, DA)及基於遷移學習(transfer learning)之指紋室內定位方法來進行定位資料校正。基於領域自適應方法將對應原設備與原定位區域的源域(source domain)與對應新設備與新定位區域的目標域(target domain)的定位資料分佈混和，藉此找到源域與目標域共同的特徵分佈空間，來改善目標域的定位精準度。基於遷移學習方法使用具有對應源域權重的自動編碼器進行遷移學習，以重構出適合目標域使用的自動編碼器。本研究收集室內指紋定位資料進行實驗，針對不同實驗場景評估所提方法之效能，並與相關方法比較。實驗結果顯示，在不同的訊號接收裝置以及不同的定位區域下，本論文所提方法皆有相對良好的定位精準度。;The fingerprint indoor localization method has good localization accuracy. It performs indoor localization by collecting beacon signals of beacon nodes at different reference points to form beacon fingerprints, where beacon nodes are pre-deployed at specific locations. To improve the localization accuracy for new beacon signal receiving devices and new localization zones, it is usually necessary to perform localization data (i.e., fingerprint) calibration by re-collecting beacon signals. This thesis proposes a method based on domain adaptation and a method based on transfer learning for performing fingerprint calibration. The method based on domain adaptation mixes the fingerprint distributions of the source domain and the target domain to find common distribution spaces for improving localization accuracy, where the former corresponds to the original beacon signal receiving devices and the original localization zone, and the latter corresponds to new beacon signal receiving devices and/or new localization zones. In the method based on transfer learning, the autoencoder with weights corresponding to the source domain is used to reconstruct, by the transfer learning scheme, the autoencoder with weights suitable for the target domain. Indoor fingerprint localization data are collected for conducting experiments to evaluate and compare the performance of the proposed methods and related methods. The experimental results show that the proposed methods have relatively good localization accuracy for different signal receiving devices and different localization zones.
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