Indoor positioning with smartphone-compatible technologies has fostered much research
attention in recent years. In this context, Bluetooth Low Energy (BLE) reveals a good …

Existing indoor positioning systems, such as WiFi, Bluetooth and ultra-wideband based
solutions, have difficulty achieving a balance among cost, accuracy and coverage …

We propose an asynchronous acoustic chirp slope keying to map short bit sequences on
single or multiple bands without preamble or error correction coding on the physical layer …

Current ultrasonic Local Positioning Systems (LPS) based on an infrastructure of beacons
can provide centimeter-level accuracy employing the spread spectrum technique, which …

The digital transformation is exciting the uptake of Internet-of-Things technologies, and
raises the questions surrounding our knowledge of the positions of many of these things. A …

Hybrid acoustic-RF systems offer excellent ranging accuracy, yet they typically come at a
power consumption that is too high to meet the energy constraints of mobile IoT nodes. We …

Existing acoustic-based positioning solutions face difficulties achieving precise ranging and
positioning, especially in dynamic situations, due to Doppler frequency shift (DFS). In this …

Chirps are familiar in nature, have a built-in resistance to noise and interference, and are
connected to a wide range of highly oscillatory processes. Detecting chirp oscillating …

This work establishes the theoretical foundations to optimally design Dual Linear Frequency
Modulated (DLMF) Signals intended to measure range and speed. Expressions are derived …

Currently, most acoustic positioning strategies are based on broadband coding and the
pulse compression technique to obtain better accuracy and robustness against in-band …