eprintid: 475 rev_number: 6 eprint_status: archive userid: 5 dir: disk0/00/00/04/75 datestamp: 2011-03-25 lastmod: 2013-07-01 09:40:37 status_changed: 2013-07-01 09:40:37 type: techreport metadata_visibility: show item_issues_count: 0 creators_name: Manica, Luca creators_name: Rocca, Paolo creators_name: Martini, Anna creators_name: Massa, Andrea title: An innovative approach based on a tree-searching algorithm for the optimal matching of independently optimum sum and difference excitations ispublished: pub subjects: TU full_text_status: public keywords: Linear Arrays, Monopulse Antennas, Sum and Difference Pattern Synthesis, Tree-Searching Algorythm abstract: An innovative approach for the optimal matching of independently optimum sum and difference patterns through sub-arrayed monopulse linear arrays is presented. By exploiting the relationship between the independently optimal sum and difference excitations, the set of possible solutions is considerably reduced and the synthesis problem is recast as the search of the best solution in a non-complete binary tree. Towards this end, a fast resolution algorithm that exploits the presence of elements more suitable to charge sub-array membership is presented. The results of a set of numerical experiments are reported in order to validate the proposed approach pointing out its effectiveness also in comparison with state-of-the-art optimal matching techniques. (c) 2008 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. date: 2008-01 date_type: published institution: University of Trento department: informaticat refereed: TRUE referencetext: [1] M. I. Skolnik, Radar Handbook . New York: McGraw-Hill, 1990. [2] T. T. Taylor, "Design of line-source antennas for narrow beam-width and low sidelobes," Trans. IRE , AP-3, 16-28, 1955. [3] D. A. McNamara, "Discrete n-distributions for difference patterns," Electron. Lett.,22(6), 303-304, 1986. [4] D. A. McNamara, "Synthesis of sub-arrayed monopulse linear arrays through match-ing of independently optimum sum and difference excitations," IEE Proc. H , 135(5),371-374, 1988. [5] D. A. McNamara, "Direct synthesis of optimum difference patterns for discrete lineararrays using Zolotarev distribution," IEE Proc. H , 140(6), 445-450, 1993. [6] F. Ares, S. R. Rengarajan, J. A. Rodriguez, and E. Moreno, "Optimal Compromiseamong sum and difference patterns through sub-arraying," Proc. IEEE AntennasPropagat. Symp., 1142-1145, 1996. [7] S. Caorsi, A. Massa, M. Pastorino, and A. Randazzo, "Optimization of the differencepatterns for monopulse antennas by a hybrid real/integer-coded differential evolutionmethod," IEEE Trans. Antennas Propagat., 53(1), 372-376, 2005. [8] P. Lopez, J. A. Rodriguez, F. Ares, and E. Moreno, "Subarray weighting for dierencepatterns of monopulse antennas: Joint optimization of subarray Congurations andweights," IEEE Trans. Antennas Propagat ., 49(11), 1606-1608, 2001. [9] M. D'Urso and T. Isernia, "Solving some array synthesis problems by means of aneffective hybrid approach," IEEE Trans. Antennas Propagat ., 55(3), 750-759, 2007. [10] M. D'Urso, T. Isernia, and E. F. Meliado' "An effective hybrid approach for theoptimal synthesis of monopulse antennas," IEEE Trans. Antennas Propagat ., 55(4),1059-1066, 2007. [11] R. Otter, "The number of trees,", Annals of Mathematics, 49(3), Jul. 1948. [12] D. B. West, Introduction to Graph Theory . Englewood Cliffs, NJ: Prentice-Hall, 2000. [13] A. T. Villeneuve, "Taylor patterns for discrete arrays", IEEE Trans. Antennas Prop-agat ., 32, 1089-1093, 1984. [14] C. A. Balanis, Antenna Theory: Analysis and Design. New York: Wiley, 1982. [15] C. L. Dolph, "A Current distributionoptimizes for broadside arrays which optimizesthe relationship between beam width and sidelobe level," Proc. IRE , 34, 335-348,1946. [16] W. D. Fisher, "On grouping of maximum homogeneity," American Statistical Journal ,789-798, 1958. citation: Manica, Luca and Rocca, Paolo and Martini, Anna and Massa, Andrea (2008) An innovative approach based on a tree-searching algorithm for the optimal matching of independently optimum sum and difference excitations. [Technical Report] document_url: http://www.eledia.org/students-reports/475/1/DISI-11-004.pdf