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Synchronization of multiple independent sub-array antennas
Tijdschriftbijdrage - Tijdschriftartikel
Ondertitel:an application for angle of arrival estimation
In this paper we present a new algorithm to synchronize multiple individual receiving sub-array antennas to form an augmented array antenna system. This augmented array antenna has a large antenna aperture that can be used for angle of arrival (AoA) estimations and it provides a better AoA estimation accuracy than the individual sub-array antennas. The proposed algorithm synchronizes the time and the frequency of the different sub-array antennas, using a joint Maximum Likelihood (ML) optimization for a data aided received signal. The phase coherency between the sub-array antennas is achieved by using a combination of the least mean square (LMS) and ML algorithms. The experimental results and the simulation example show that the proposed algorithm 1) is stable in estimating the augmented array antenna pattern, 2) provides more accurate AoA estimations than the individual subarray antennas 3) has no limitation to the structure of the augmented array antenna in space and 4) converges very fast. Furthermore, the experimental results prove the feasibility of using AoA estimation techniques for Internet of Things (IoT) localization in outdoor environments.
Tijdschrift: IEEE Transactions on Antennas & Propagation
Pagina's: 1223 - 1232
Jaar van publicatie:2019