Title :
Source Localization from Quantized Time of Arrival Measurements
Author :
Castañeda, Nadir ; Charbit, Maurice ; Moulines, Eric
Author_Institution :
Telecom Paris
Abstract :
In this paper, we consider the localization of a source from quantized measurements of time of arrivals (TOA) or time difference of arrivals (TDOA). Applications include, as particular examples, acoustic source localization from a network of microphones under communication constraints, and the localization of a base station using a geolocalized mobile station using tuning advance measurements. We use a maximum likelihood approach, based on an efficient implementation of the EM algorithm. Contrary to previously reported work, our technique takes into account not only the measurement noise, but also the presence of outliers (for example, non line of sight propagation) and the quantization. We illustrate our findings using simulated data and real field measurements
Keywords :
acoustic transducers; maximum likelihood estimation; mobile radio; time-of-arrival estimation; wireless sensor networks; TDOA; acoustic source localization; base station; communication constraints; geolocalized mobile station; maximum likelihood approach; microphones; quantized time of arrival measurements; source localization; time difference of arrivals; Acoustic applications; Acoustic measurements; Base stations; Microphones; Mobile communication; Noise measurement; Particle measurements; Quantization; Time difference of arrival; Time measurement;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on
Conference_Location :
Toulouse
Print_ISBN :
1-4244-0469-X
DOI :
10.1109/ICASSP.2006.1661123