Location System in Interiors by Ultrasound

Abstract

This article explain the development of a prototype for tracking system, which is made for low cost, and for closed environments such as offices and rooms with low density of obstacles. The position is obtained from pseudo-ranges, which are calculated from the time taken by the ultrasound signal to travel from a known-point to the receiver. This process is repeated continuously until the receiver has received three pseudoranges, then the process of estimation starts based on the trilateration algorithm. [1]