Assous, Said; Jackson, Peter; Hopper, Clare; Gunn, David; Rees, John; Lovell, Mike. 2008 Bat-inspired distance measurement using phase information. Journal of the Acoustical Society of America, 124 (4). 2597.
Abstract
A new approach to time delay estimation, based on the inclusion of
phase di®erence information between components of the received sig-
nal is presented. A multi-component signal has been developed to solve
the phase ambiguity problem. We present the concept and investigate
its effectiveness through theoretical and practical examples, including
underwater acoustic measurements, taking noisy environments into ac-
count. We demonstrate resolutions better than a ¯ftieth of a wave-
length, even in the presence of high levels (-5dB) of additive gaussian
noise.
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