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amplitude of signal

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Feature-based probabilistic map building using time and amplitude information of sonar in indoor environments
Hyoung Jo Jeon, Byung Kook Kim
Journal:

Robotica / Volume 19 / Issue 4 / July 2001

Published online by Cambridge University Press:

05 July 2001, pp. 423-437
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We present a feature-based probabilistic map building algorithm which directly utilizes time and amplitude information of sonar in indoor environments. Utilizing additional amplitude-of-signal (AOS) obtained concurrently with time-of-flight (TOF), the amount of inclination of target can be directly calculated from a single echo, and the number of measurements can be greatly reduced with result similar to dense scanning. A set of target groups (set of hypothesized targets originated from one measurement) is used and refined by each measurement using an extended Kalman filter and Bayesian conditional probability. Experimental results in a real indoor environment are presented to show the validity of our algorithm.