Dealing with the adaptive nulling of the array radiation pattern, two reconfigurable thinning strategies are presented and assessed. An easily-reconfigurable and low-complexity antenna architecture is considered where a set of radio-frequency switches is exploited to either connect or disconnect the array elements for controlling the radiation pattern and generating deep nulls along the directions-of-arrival of the undesired signals. By defining through a genetic algorithm-based optimization the on/off status of the switches to maximize the signal-to-interference-plus-noise ratio at the antenna output, two different formulations are discussed. The first one does not constrain the number of active elements, while the other forces the solution to satisfy a fixed-directivity criterion also in correspondence with a time-varying interference scenario. The performances of the proposed approaches are assessed in both static and time-varying scenarios where single and multiple interfering signals impinge on the array from different angular directions

Reconfigurable Thinning for the Adaptive Control of Linear Arrays / Poli, Lorenzo; Rocca, Paolo; Salucci, Marco; Massa, Andrea. - In: IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION. - ISSN 0018-926X. - STAMPA. - 61:10(2013), pp. 5068-5077. [10.1109/TAP.2013.2272452]

Reconfigurable Thinning for the Adaptive Control of Linear Arrays

Poli, Lorenzo;Rocca, Paolo;Salucci, Marco;Massa, Andrea
2013

Abstract

Dealing with the adaptive nulling of the array radiation pattern, two reconfigurable thinning strategies are presented and assessed. An easily-reconfigurable and low-complexity antenna architecture is considered where a set of radio-frequency switches is exploited to either connect or disconnect the array elements for controlling the radiation pattern and generating deep nulls along the directions-of-arrival of the undesired signals. By defining through a genetic algorithm-based optimization the on/off status of the switches to maximize the signal-to-interference-plus-noise ratio at the antenna output, two different formulations are discussed. The first one does not constrain the number of active elements, while the other forces the solution to satisfy a fixed-directivity criterion also in correspondence with a time-varying interference scenario. The performances of the proposed approaches are assessed in both static and time-varying scenarios where single and multiple interfering signals impinge on the array from different angular directions
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Poli, Lorenzo; Rocca, Paolo; Salucci, Marco; Massa, Andrea
Reconfigurable Thinning for the Adaptive Control of Linear Arrays / Poli, Lorenzo; Rocca, Paolo; Salucci, Marco; Massa, Andrea. - In: IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION. - ISSN 0018-926X. - STAMPA. - 61:10(2013), pp. 5068-5077. [10.1109/TAP.2013.2272452]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/34984
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