A low cost TDOA localization system: Setup, challenges and results

In this paper we present a prototype location estimation system which uses Time Difference of Arrival. The system consists of five low cost sensors that are synchronized using GPS time stamps. The sensors were installed on the rooftops of the university campus. The system is based on software defined radios which enable receiving signals with different carrier frequencies and sampling rates with the aim of applying it as a frequency monitoring and regulating system. The paper presents the expected challenges we face from the system and compares them to the measured results.