Direction of Arrival Estimation Using a Reconfigurable Array

摘要

The goal of this project was to create a reconfigurable array that can determine the direction of arrival of a target. This goal was accomplished by using existing algorithms, in conjunction with redefining the assumed geometry of the array. These algorithms were modified to work with arrays that have the ability to move or change shape. The project investigated the effect of array rotation on the size of the data needed for the algorithm. It also examined the effect of changing the geometry from a purely linear array to an array that has two linear parts. For demonstration purposes, ultrasonic sensors were used. Prior to implementing them, the proposed modifications to the geometry were simulated using a computer model. After the simulations were complete, the modifications were tested on the actual array. The first geometry examined with actual sensors was the linear array. The geometries investigated were those consisting of half of the array rotating such that the array formed an angle. These geometries were tested using the modifications made to the assumed geometry of the array within the algorithm. The modification of the assumed geometry allowed for different geometries to be tested.