University of Oulu

H. Paaso et al., "DoA Estimation Using Compact CRLH Leaky-Wave Antennas: Novel Algorithms and Measured Performance," in IEEE Transactions on Antennas and Propagation, vol. 65, no. 9, pp. 4836-4849, Sept. 2017. doi: 10.1109/TAP.2017.2724584

DoA estimation using compact CRLH leaky-wave antennas : novel algorithms and measured performance

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Author: Paaso, Henna1; Gulati, Nikhil2; Patron, Damiano3;
Organizations: 1VTT Technical Research Center of Finland, 90570 Oulu, Finland
2General Electric, San Ramon, CA 95134 USA
3Department of Electrical and Computer Engineering, Drexel University, Philadelphia, PA 19104 USA
4Department of Electronics and Communications Engineering, Tampere University of Technology, 33720 Tampere, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 4 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2017
Publish Date: 2020-02-27


Traditional direction-of-arrival (DoA) estimation algorithms for multielement antenna arrays (AAs) are not directly applicable to reconfigurable antennas due to inherent design and operating differences between AAs and reconfigurable antennas. In this paper, we propose novel modifications to the existing DoA algorithms and show how these can be adapted for real-time DoA estimation using two-port composite right/ left-handed (CRLH) reconfigurable leaky-wave antennas (LWAs). First, we propose a single/two-port multiple signal classification (MUSIC) algorithm and derive the corresponding steering vector for reconfigurable LWAs. We also present a power pattern cross correlation algorithm that is based on finding the maximum correlation between the measured radiation patterns and the received powers. For all algorithms, we show how to simultaneously use both ports of the two-port LWA in order to improve the DoA estimation accuracy and, at the same time, reduce the scanning time for the arriving signals. Moreover, we formulate the Cramer-Rao bound for MUSIC-based DoA estimation with LWAs and present an extensive performance evaluation of MUSIC algorithm based on numerical simulations. In addition, these results are compared to DoA estimation with conventional AAs. Finally, we experimentally evaluate the performance of the proposed algorithms in an indoor multipath wireless environment with both line-of-sight (LoS) and non-LoS components. Our results demonstrate that DoA estimation of the received signal can be successfully performed using the two-port CRLH-LWA, even in the presence of severe multipath.

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Series: IEEE transactions on antennas and propagation
ISSN: 0018-926X
ISSN-E: 1558-2221
ISSN-L: 0018-926X
Volume: 65
Issue: 9
Pages: 4836 - 4849
DOI: 10.1109/TAP.2017.2724584
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: The authors would like to thank Adant Technologies Inc., Padova, Italy, for providing the antenna prototypes. The measurements have been carried out at Drexel University, Philadelphia, PA, USA. A preliminary version of this paper appeared in CROWNCOM 2013 conference [32].
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