This paper presents a novel formulation for the estimation of the coordinates of a wave
source based on the differences in the time-of-flights from a single transmitter to various …

Ultrasonic positioning systems (UPSs) are used for various types of applications across a
wide variety of fields, including robot navigation, device location, and pose estimation. In this …

This paper describes the autonomous and semi-autonomous navigation system of a
powered wheelchair for disabled people and nursing staffs. In order to detect its position …

We describe short-range acoustic communication in air using differential biphase shift
keying (DBPSK). In this system, a carrier recovery circuit is unnecessary, since the …

The paper presents the concept of the method of determining the direction of ultrasonic
signal arrival, ie, the azimuth and elevation angles. This method is an extension of the …

This paper is part II of a paper published in the previous issue of Robotica. This part
proceeds from the assumption that 3D features have been calssified into either a plane, a …

In this paper, we propose a novel method of demodulation in low-signal-to-noise ratio (SNR)
environments for differential phase shift keying (DPSK) acoustic communication in air. A …

This paper gives a short overlook over methods of ultrasonic distance measurement
systems. The pulse compression method is used to overcome several limits of conventional …

We experimentally evaluate the locality of digital acoustic communication in air. Digital
acoustic communication in air is suitable for a small cell system, because acoustic waves …

The pulse compression method adds several improvements to ultrasonic distance
measurement systems. Especially in conjunction with the one bit correlation method, which …