The Indoor Geolocation research program at WPI started in 1997 with a joint project between CWINS and TASC/Litton as a part of  DARPA’s SUO/SAS project. In this project the pioneering work of the center on radio channel modeling for indoor geolocation application demonstrated the difficulties in accurate indoor geolocation using TOA measurements. The follow up joint research with the CWC, University of Oulu, Finland in 1999 addressed positioning using OFDM signals used for IEEE802.11a/HIPERLAN-2 WLANs. In the year 2000 CWINS received an NSF award to establish a foundation for indoor geolocation studies. Currently, the center works closely with DARPA projects for military application and local industry for commercial developments.