Adaptive Arrays Control: Theory and Techniques
P. Rocca
University of Trento, Italy
Paolo Rocca is an Assistant Professor at the Department of Information Engineering and Computer Science of the University of Trento and a member of the ELEDIA Research Center. He is the author/co-author of over 250 peer reviewed papers (with almost 90 journal papers) mainly on antenna arrays design and control. He has been a visit1ing student at the Pennsylvania State University and at the University Mediterranea of Reggio Calabria and a Visiting Researcher at the Ecole Supérieure d'Electricité (SUPELEC). Dr. Rocca has been awarded from the IEEE Geoscience and Remote Sensing Society and the Italy Section with the best PhD thesis award IEEE-GRS Central Italy Chapter. His main interests are in the framework of antenna array synthesis and design, electromagnetic inverse scattering, and optimization techniques for electromagnetics. He serves as an Associate Editor of the IEEE Antennas and Wireless Propagation Letters.
R. L. Haupt
Colorado School of Mines, USA
Prof. Haupt has been working with adaptive arrays since 1982. He have authored many papers on antenna arrays, adaptive arrays, and reconfigurable arrays. He has taught electromagnetics topics at 6 different universities as well as worked in industry and government on phased array projects. Two relevant books: R. A. Monzingo, R. L. Haupt, and T.W. Miller, Introduction to Adaptive Antennas, 2ed., Scitech Publishing, 2010 and R.L Haupt, Antenna Arrays: A Computational Approach, New York: Wiley, 2010.
Abstract
Interferences are becoming more and more common due to the growing number of wireless systems and applications which are used in our everyday life and that crowd the frequency spectrum. When the main beam gain times the desired signal is less than the sidelobe gain times the interference signal, then the interference overwhelms the desired signal. An adaptive antenna automatically adjusts its antenna pattern to steer the main beam in the direction of the desired signal while placing nulls in the direction of the interferences.
Adaptive antenna arrays are widely used in well-established applications like radar, sonar, seismic, and communications and are of great interest also in novel systems related to automotive, navigation and remote sensing. These antenna systems are designed to complement other interference suppression techniques, such as low sidelobes, spread-spectrum techniques, and high directivity.
In this framework, the course is focused on adaptive antenna arrays and is aimed at presenting a review, starting from the basic theoretical concepts, of the principal technologies and algorithms used for the control of these antenna systems up to the most recent advances. The theoretical part will be corroborated with examples on the use of adaptive arrays for real applications.
The short course will consist of three main parts, namely theory, algorithms, and architectures, where the following topics will be presented:
- THEORY: terminology / signals in antenna arrays / interference and noise / adaptive array approaches;
- ALGORITHMS: direct inversion of the covariance matrix / random search / deterministic and stochastic optimization / non-digital beam-forming approaches;
- ARCHITECTURES: dynamic and reconfigurable arrays / multipath / MIMO / time-modulated arrays / adaptive array calibration and compensation.
