Title :
Target tracking and localization with ambiguous phase measurements of sensor networks
Author :
Cheng, Yongqiang ; Wang, Xuezhi ; Caelli, Terry ; Moran, Bill
Author_Institution :
Sch. of Electron. Sci. & Eng., Nat. Univ. of Defense Technol., China
Abstract :
When tracking a target using phase-only signal returns, range ambiguities are a major issue. In this work, a look-up table between phase measurement space and target location space is constructed for phase measurement mapping. Solving such problems via solutions to Diophantine equations has been used to locate candidate locations. Here we show how such target location ambiguity can also be resolved over time when the underlying target is in motion and where issues of clutter are treated via a phase distribution discrimination method. That is, a probability density function of the ambiguous phase-only measurement that takes both sensor noise and target motion distributions into account is derived based on directional statistics. This approach to solving phase ambiguity under significant clutter conditions has promising results.
Keywords :
phase measurement; probability; target tracking; wireless sensor networks; Diophantine equations; ambiguous phase measurements; phase distribution discrimination method; phase measurement mapping; phase-only signal returns; probability density function; sensor networks; sensor noise; target tracking-localization; Equations; Mathematical model; Noise; Noise measurement; Phase measurement; Table lookup; Target tracking; Phase-only measurement; data association based filtering; distributed sensor localisation; range ambiguity; target tracking;
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2011 IEEE International Conference on
Conference_Location :
Prague
Print_ISBN :
978-1-4577-0538-0
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2011.5947241