Angle of arrival (AoA) estimation by using software defined radios
Source direction of arrival (DoA) or angle of arrival (AoA) estimation is one of the vital problems in many wireless communication applications such as radar, radio astronomy, sonar and navigation. The resolution of a source direction of arrival estimation can be improved by an uniform linear array (ULA) system with innovative signal processing techniques. Super resolution techniques take the advantage of linear array antenna structures to better process the incoming waves. These techniques also have the ability to describe the direction of multiple targets. In this paper, MUSIC algorithm is implemented on USRP nodes using LabVIEW platform. Four receiver antennas are used to detect the AoA of a single carrier and unmodulated RF signal at 2.45 GHz in an indoor environment. The experimental results are shown for a single source which is tested at two different arbitrary angles to confirm the real time implementation of MUSIC algorithm with some errors which occur due to lack of some hardware imperfections. Moreover, these hardware imperfections are studied.
2016 24th Signal Processing and Communication Application Conference (SIU)