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In this paper, the authors present an automated tool for finger print constructions and leverage it to study novel scenarios for device-based and device-free WiFi-based localization that are difficult to evaluate in a real environment. In a particular, the authors examine the effect of changing the access points (AP) mounting location, AP technology upgrade, crowd effect on calibration and operation, among others; on the accuracy of the localization system. The authors present the analysis for the two classes of WiFi-based localization: device-based and device-free. The authors analysis highlights factors affecting the localization system accuracy, how to tune it for better localization, and provides insights for both researchers and practitioners.<\/p>","DOI":"10.4018\/ijaci.2014010101","type":"journal-article","created":{"date-parts":[[2014,6,17]],"date-time":"2014-06-17T10:39:17Z","timestamp":1403001557000},"page":"1-19","source":"Crossref","is-referenced-by-count":12,"title":["An Analysis of Device-Free and Device-Based WiFi-Localization Systems"],"prefix":"10.4018","volume":"6","author":[{"given":"Heba","family":"Aly","sequence":"first","affiliation":[{"name":"Department of Computer and Systems Engineering, Alexandria University, Alexandria, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Moustafa","family":"Youssef","sequence":"additional","affiliation":[{"name":"Wireless Research Center, Egypt-Japan University of Science and Technology and Alexandria University, Alexandria, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2432","reference":[{"key":"ijaci.2014010101-0","doi-asserted-by":"crossref","unstructured":"Abdel-Nasser, H., Samir, R., Sabek, I., & Youssef, M. 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