Publica
Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Investigation of theoretical limits for unconditional AoA estimations in multielement antenna arrays by simulations
 Institute of Electrical and Electronics Engineers IEEE; IEEE Industrial Electronics Society: IEEE International Conference on Industrial Technology, ICIT 2020. Proceedings : 2628 February 2020, Buenos Aires, Argentina Piscataway, NJ: IEEE, 2020 ISBN: 9781728157542 ISBN: 9781728157559 pp.663668 
 International Conference on Industrial Technology (ICIT) <2020, Buenos Aires> 

 English 
 Conference Paper 
 Fraunhofer HHI () 
Abstract
In this paper, we thoroughly investigate the performance of unconditional angleofarrival AoA estimation in multielement antennas for a finite number of samples. Two AoA estimation algorithms are applied: a direct iterative algorithm for searching the maximum likelihood (ML) estimate and a threestep algorithm using the sample covariance matrix eigenvalue decomposition at the first step and the leastsquare (LS) method to improve the estimate at the next steps. Two configurations of antenna systems are considered: uniform linear array (ULA) and uniform circular array (UCA). It is shown that for the proposed algorithms and considered antenna configurations, the accuracy of AoA estimation for large SNR reaches a theoretical limit that depends only on the sample size N. In low SNR region the iterative algorithm at 35 % 50 % outperforms the accuracy of the threestep algorithm. The joint detectionestimation schemes for the considered estimators and antenna arrays were investigated. It was shown that the detection characteristics of these schemes are very close for the given numbers of antenna elements and samples.