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A time difference of arrival system architecture for GSM mobile phone localization in search and rescue scenarios

A time difference of arrival system architecture for GSM mobile phone localization in search and rescue scenarios,10.1109/WPNC.2011.5961009,Alexander

A time difference of arrival system architecture for GSM mobile phone localization in search and rescue scenarios  
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In this work, a novel architecture of a time differ- ence of arrival based localization system for GSM mobile phones is proposed. The system is well-suited for search and rescue scenarios and comprises receiving stations for GSM signals, a dedicated GSM base station and a radio frequency jamming system for GSM and UMTS signals. The system may be operated in the E-GSM 900 band providing high penetration of the covering debris material and a sufficient overall bandwidth for the time difference of arrival measurements. In this case, the best attainable accuracy of localization is shown to be in the scale of 5m . The components of the system are described in more detail and possible implementations are proposed. The system may also be applied for the localization of UMTS mobile phones making use of the integrated GSM functionality. The proposed system represents a novel approach for time difference of arrival based localization of mobile phones in search and rescue scenarios. I. INTRODUCTION The localization of GSM mobile phones has been subject of scientific research over the past few years. The main need for accurate localization were the emergence of localization based services and regulatory conditions to provide position information in case of emergency calls (E911 and E112 initia- tives). The applied techniques for localization and especially the time delay estimation of GSM signals were therefore designed to fit in the existing architecture of mobile phone networks. In view of the fact that mobile phone localization also provides an interesting means for search and rescue applications, this subject has recently regained interest. As part of the I-LOV project, which aims to provide novel techniques for localization of trapped people under collapsed structures after natural disasters like earthquakes or landslides, novel techniques for GSM localization are investigated. (1) In this work, time of flight based localization according to the time difference of arrival (TDOA) principle will be fo- cused. The overall system architecture will be introduced and the working principles of the components will be discussed.
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