Method for synchronizing signals acquired from...

Details Method for synchronizing signals acquired from... Method for synchronizing signals acquired from...

2005-08-23

2005-08-23

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Calibration or correction system

Timing

C702S103000, C702S104000, C381S071100, C381S080000, C084S645000

Reexamination Certificate

active

06934651

ABSTRACT:
A method synchronizes signals from unsynchronized sensors spatially dispersed in an environment. Each sensor acquires an unsynchronized signal from the environment. An identical timing signal is received in each sensor. Frequencies of the timing signal are substantially disjoint of frequencies of the unsynchronized signals. The timing signal is combined with the unsynchronized signal in each sensor. The combined signals are received by a signal processor where the combined signals are separated to recover the unsynchronized signals and the timing signals. Then, the unsynchronized signals can be time-aligned according to the recovered timing signals to produce time-aligned signals.

REFERENCES:
patent: 4862506 (1989-08-01), Landgarten et al.
patent: 5999856 (1999-12-01), Kennedy
patent: 2004/0069126 (2004-04-01), Ludwig
Lienhart et al., “On The Importance of Exact Synchronziation For Distributed Auto Signal Processing,” ICASSP, Apr. 2003.
Griebel et al., “Microphone array source localization using realizable delay vectors,” IEEE Workshop on Appl. Sig. Proc. to Audio and Acoust., pp. 71-74, 2001.
Bletsas et al., “Natural Spontaneous Order in Wireless Sensor Networks: Time Synchronization Based On Entrainment,” to appear in Pervasive Computing, 2004.

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