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Antenna array optimization strategies for robust direction finding

: Großmann, Marcus; Ramireddy, Venkatesh; König, Jonas; Landmann, Markus; Römer, Florian; Galdo, Giovanni del; Perthold, Rainer


Institute of Electrical and Electronics Engineers -IEEE-:
10th European Conference on Antennas and Propagation, EuCAP 2016. Proceedings : Took place 10-15 April 2016 in Davos, Switzerland
Piscataway, NJ: IEEE, 2016
ISBN: 978-88-907018-6-3
ISBN: 978-1-5090-2234-2
5 pp.
European Conference on Antennas and Propagation (EuCAP) <10, 2016, Davos>
Conference Paper
Fraunhofer IIS ()
drahtloses Kommunikationssystem

This paper focuses on the optimization of uniform circular antenna array (UCA) structures equipped with analog combining networks for direction finding applications. For such type of arrays, the specific choice of the combining matrix has a crucial impact on the effective radiation pattern and the sensitivity of direction-of-arrival (DOA) estimation. A design framework for constructing the combining network is proposed that improves the DOA estimation performance of the array while limiting the probability of false detection of the DOA estimator to a desired value. In detail, we first derive an analytical expression for the false detection probability of the DOA estimator. This function together with the Cramer-Rao bound are then used to find the optimal combining matrix and array aperture size for a given number of sensor elements and combiner output (baseband) channels. We provide design examples to demonstrate the effectiveness of our approach.