SYSTEM AND METHOD FOR WIRELESS POSITIONING AND LOCATION DETERMINATION
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United States of America Patent
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Jul 16, 2015
app pub date -
Mar 25, 2015
filing date -
Jun 12, 2008
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Abstract
A system and method for wireless sensor networks (WSN) positioning that is cost-effective, scalable, can be easily implemented, and provides improved performance and accuracy. A plurality of reference nodes with known locations transmit linear frequency modulation continuous waves (FMCW), while sensor nodes receive these waves and calculate the range difference among them based on the time frequency difference arrival (TFDA). The location information of the sensor nodes is obtained through the solving of a set of hyperbolic equations. Multidimensional scaling may be used or hybrid optimizing algorithm (HOA) processing to combine steepest-descent processing with Taylor series expansion to increase accuracy.
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