Echolocating bats use active sensing as they emit sounds and listen to the returning echoes to probe their environment for navigation, obstacle avoidance and pursuit of prey. The sensing behavior of bats includes the planning of 3D spatial trajectory paths, which are guided by echo information. In this study, we examined the relationship between active sonar sampling and flight motor output as ...

Interferometric Synthetic Aperture Sonar provides a means of obtaining high resolution three-dimensional images of objects on the sea floor. This paper describes a technique for forming images using interferometric sonar data. The technique is novel in the way it combines image co-registration and height estimation. Results of applying the technique to real sonar data are given.

The Generic Ocean Array Technology Sonar (GOATS) Joint Research Program is currently exploring the development of sensor-adaptive autonomous underwater vehicle (AUV) technology specifically directed toward rapid environmental assessment and mine countermeasures in coastal environments. As part of the effort, MIT is developing the GOATS multi-static sonar concept with the goal of being able to d...

Dealing with methods of human-robot interaction and using a real mobile robot, stable methods for people detection and tracking are fundamental features of such a system and require information from different sensory. In this paper, we discuss a new approach for integrating several sensor modalities and we present a multimodal people detection and tracking system and its application using the d...

This paper describes the implementation of a bathymetric synthetic aperture sonar and presents imagery from preliminary sea trials of the sonar. The sonar is designed for high resolution seafloor imaging in a shallow water environment. To estimate seafloor topology, the sonar ssytem uses the phase difference between elements of a vertical hydrophone array. Since the interferometric process uses...

The ability of traditional active sonar processing methods to detect targets is often limited by clutter and reverberation from ocean environments. Similarly, multipath arrivals from radiating sources such as ships and submarines are received at sensors in passive sonar systems. Reverberation and multipath signals introduce constructive and destructive interference patterns in received spectrog...

To recognize underwater target precisely is always a hot potato to navies due to the complicated watery environment. It’s different from the aerial circumstance. There is much more interfere under the sea. Sonar is the most efficient way to detect underwater world at present time. In this paper, a geneticbased classifier system is designed which recognizes targets by sonar fingerprints. This me...