Single-Receiver Switched Opportunistic Approach to AoA Estimation in Hardware Impaired Scenarios

Conference: SCC 2017 - 11th International ITG Conference on Systems, Communications and Coding
02/06/2017 - 02/09/2017 at Hamburg, Germany

Proceedings: ITG-Fb. 268: SCC 2017

Pages: 6Language: englishTyp: PDF

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Papaiz, Andrea (WiPLi Lab, University of Udine, Via delle Scienze 206, 33100 Udine, Italy)
Tonello, Andrea M. (EcoSys Lab, Alpen-Adria-Universität Klagenfurt, Universitätsstr. 65-67, 9020 Klagenfurt, Austria)

In this paper, a novel switched hardware approach to angle of arrival (AoA) estimation in radio systems that signal using quadrature amplitude modulations (QAM) is presented. The proposed algorithm, namely constellation statistical pattern identification and overlap (CSP-IDO), is based on the comparison of the probability density functions of successive signal snapshots from antennas (asynchronous approach). Contrariwise, other AoA techniques such as differential methods, beamforming and root-MUSIC are designed to acquire in parallel signals from the antennas (synchronous approach). CSP-IDO allows a significantly reduced hardware usage with respect to synchronous methods, without deteriorating precision. The proposed algorithm used with a time switched antenna approach leads to better performance in terms of overall hardware complexity, power consumption and possibly costs. Furthermore, CSP-IDO is robust to transmitter hardware impairments with respect to synchronous methods.