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Accession Number ADA564175
Title Location and Navigation with Ultra-Wideband Signals.
Publication Date Jun 2012
Media Count 70p
Personal Author J. Harris L. Yang
Abstract Existing positioning and navigation applications mainly rely on GNSS. However, its application to indoor, metropolitan and heavy-foliage scenarios is significantly constrained by the satellite visibility, limited accuracy and the intensively frequency-selective channel condition. In this research, we investigated ranging and localization techniques using ultra- wideband (UWB) signals. In particular, we have developed two time-of-arrival (ToA) estimators for single-band UWB signals. To generalize them to multi-band UWB signals, we investigated the pros and cons of coherent and non-coherent multi-band signal combining, and studied the phase rotation calibration in order to facilitate effective coherent combining. Last but not least, we developed cooperative localization algorithms based on semi-definite programming (SDP) and developed algorithms based on semi-definite programming (SDP) and developed algorithms exploiting Doppler shift in mobile scenarios. On these subjects, we have published/submitted 13 peer-reviewed journal and conference papers.
Keywords Algorithms
Doppler effect
Fofa(Focusing on first arrival)
Global positioning system
Gnss(Global navigation satellite system)
Maximum likelihood estimation
Mb ofdm(Multiband orthogonal frequency division multiplexing
Navigation satellites
Random phase ratation
Range finding
Signal processing
Time of arrival
Uwb(Ultra wideband) signals

Source Agency Non Paid ADAS
NTIS Subject Category 62 - Computers, Control & Information Theory
76D - Navigation Systems
Corporate Author Florida Univ., Gainesville. Coll. of Engineering.
Document Type Technical report
Title Note Final rept. Jun 2009-Nov 2011.
NTIS Issue Number 1302
Contract Number FA9550-09-1-0269

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