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2015-09-04
Robust Superdirective Beamforming Under Uncertainty Set Constraint
By
Progress In Electromagnetics Research C, Vol. 59, 59-69, 2015
Abstract
Based on gain optimization methods, superdirective beamformers can achieve high beam directivity with small aperture array. However, the extreme sensitivity to array uncertainty is a main obstacle to engineering application. In this work, a robust gain optimization algorithm under uncertainty set constraint is proposed. Considering steering vector mismatch is the result of combined effect of various array errors, and it is a measurable indicator especially in receiving system. We apply its uncertainty as a constraint on gain optimization method, which is more intuitive in physical sense. Different from existing solutions, it makes a better tradeoff among directive gain, robustness and radiation efficiency. Experimental analysis verifies its good performance in engineering.
Citation
Huajun Zhang Huotao Gao Lin Zhou Huanhuan Shang Huaqiao Zhao , "Robust Superdirective Beamforming Under Uncertainty Set Constraint," Progress In Electromagnetics Research C, Vol. 59, 59-69, 2015.
doi:10.2528/PIERC15053106
http://www.jpier.org/PIERC/pier.php?paper=15053106
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