@unpublished{TUW-263308, author = {Retscher, G{\"u}nther}, title = {Localization Using Wi-Fi - Challenges and Perspectives}, year = {2017}, keywords = {Wireless Fidelity (Wi-Fi), indoor localization, location fingerprinting, lateration, differential technique}, note = {invited; talk: Indoor3D Workshop of the ISPRS Geospatial Week, Wuhan, China; 2017-09-19 -- 2017-09-20} }