Ultrasonic ranging has been widely used in automobiles, unmanned aerial vehicles (UAVs),
robots and other fields. With the appearance of micromachined ultrasonic transducers …

The current trend in the evolution of sensor systems seeks ways to provide more accuracy
and resolution, while at the same time decreasing the size and power consumption. The use …

This paper investigates various types of coded waveforms that could be used for air-coupled
ultrasound, using a pulse compression approach to signal processing. These are needed …

This paper introduces a computationally intensive method for measuring distance at high
measurement rates using chaotic pulse-position (CPPM) signals and single-bit signal …

In this work, several code division multiple access encoding schemes are evaluated for their
application in ultrasonic sensory systems based on the determination of times-of-flight …

Recently developed acoustic positioning systems operate in a code division multiple access
(CDMA) configuration, in which the ranging signals between the nodes are digitally …

Ultrasonic crosstalk is one of the main causes of false distance measurements that reduce
the work efficiency of sonar sensors in mobile robots. To enhance the real-time performance …

In this paper, we present field-programmable gate-array (FPGA)-based configurable
architectures that are able to perform frequency-diverse target detection for real-time …

Crosstalk is one main problem which leads to false distance measurement and reduces
work efficiency of ultrasonic range sensor systems in mobile robots. The reason which …

Coaxial rotor helicopters have a wide range of civilian and military applications; however,
the collision risk of the upper and lower blades that comes with the coaxial rotor system …