%L elediasc12511
%T Adaptive nulling in time-modulated linear arrays with minimum power losses
%D 2011
%X The synthesis of adaptive time-modulated linear arrays is dealt with by means of an innovative strategy, in which a particle swarm optimiser is used to reconfigure the pulse sequence controlling the static element excitations, as well as the least significant bits of digital phase shifters to maximise the signal-to-interference-plus-noise ratio at the receiver. The reduction of the power content of sideband radiation generated by the periodic on-off commutation of switches is addressed by customising to non-isotropic sources a very effective analytic relationship. A set of selected results is reported and discussed to show the advantages and limitations of the proposed approach. Comparisons with previously published results are also presented. "This paper is a postprint of a paper submitted to and accepted for publication in IET Microwaves, Antennas & Propagation and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at IET Digital Library: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5697293"
%A Lorenzo Poli
%A Paolo Rocca
%A Giacomo Oliveri
%A Andrea Massa
%I University of Trento
%K adaptive nulling , digital phase shifters , nonisotropic sources , particle swarm optimiser , power losses , pulse sequence , sideband radiation , signal-to-interference-plus-noise ratio , static element excitations , switch periodic on-off commutation , time-modulated linear arrays