Surface Craft Motion Parameter Estimation Using Multipath Delay Measurements from Hydrophones
2011
Lo, Kam W | Ferguson, Brian G
See also ADA559142. Presented at the International Conference on Intelligent Sensors, Sensor Networks and Information Processing (7th), ISSNIP 2011, held in Adelaide, Australia, on 6-9 December 2011; published in proceedings of the same, p496-501. Government or Federal Purpose Rights License. The original document contains color images.
Show more [+] Less [-]An equation-error (EE) method is described for estimating the three motion parameters of a watercraft (sound source) moving on the sea surface at a constant speed in a constant direction as it transits past a hydrophone located above the sea floor in a shallow water environment, using multipath delay measurements from the hydrophone. The motion parameter estimates are obtained via a linear least-squares (LLS) minimization followed by an algebraic transformation. A weighting matrix is derived for the LLS minimization to reduce the error variances of the motion parameter estimates. Computer simulation results show that the error variances approach the Cramer-Rao lower bounds for small multipath delay measurement errors. The effectiveness of the EE method is demonstrated using real hydrophone data. A method is then described for estimating the linear trajectory of the transiting source using the motion parameter estimates from the individual hydrophones of an underwater acoustic sensor network.
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