This lecture discusses wireless localization techniques, focusing on device-based and network-based methods. It covers the challenges of using Received Signal Strength Index (RSSI) for localization, the concept of trilateration, and the limitations of RSSI-based methods due to multipath interference. The lecture also explores angle of arrival-based localization, synthetic aperture radar, time difference of arrival, ultra-wideband, and frequency modulated carrier wave technologies for accurate distance measurement in wireless networks.