eprintid: 511
rev_number: 6
eprint_status: archive
userid: 5
dir: disk0/00/00/05/11
datestamp: 2011-06-30
lastmod: 2013-06-30 08:54:23
status_changed: 2013-06-30 08:54:23
type: techreport
metadata_visibility: show
item_issues_count: 0
creators_name: Poli, Lorenzo
creators_name: Rocca, Paolo
creators_name: Oliveri, Giacomo
creators_name: Massa, Andrea
title: Adaptive nulling in time-modulated linear arrays with minimum power losses
ispublished: pub
subjects: TU
full_text_status: public
keywords: 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
abstract: 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"
date: 2011-01
date_type: published
institution: University of Trento
department: informaticat
refereed: TRUE
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[2] S. P. Applebaum, "Adaptive arrays"; IEEE Trans. Antennas Propag., vol. 24, no. 5, pp.585-598, Sep. 1976.
[3] C. A. Baird and G. G. Rassweiler, "Adaptive sidelobe nulling using digitally controlledphase-shifters"; IEEE Trans. Antennas Propag., vol. 24, pp. 638-649, Sep. 1976.
[4] M. K. Leavitt, "A phase adaptation algorithm"; IEEE Trans. Antennas Propag., vol. 24,pp. 754-756, Sep. 1976.
[5] H. Steyskal, "Simple method for pattern nulling by phase perturbation"; IEEE Trans. An-tennas Propag., vol. 31, pp. 163-166, Jan. 1983.
[6] R. L. Haupt, "Phase-only adaptive nulling with a genetic algorithm"; IEEE Trans. Anten-nas Propag., vol. 45, pp. 1009-1015, Jun. 1997.
[7] D. S. Weile and E. Michielssen, "The control of adaptive antenna arrays with geneticalgorithms using dominance and diploidy"; IEEE Trans. Antennas Propag., vol. 49, pp.1424-1433, Oct. 2001.11
citation:   Poli, Lorenzo and Rocca, Paolo and Oliveri, Giacomo and Massa, Andrea  (2011) Adaptive nulling in time-modulated linear arrays with minimum power losses.  [Technical Report]     
document_url: http://www.eledia.org/students-reports/511/1/DISI-11-102-R196.pdf