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In this study, we describe the modified quad-quaternion MUSIC (QQ-MUSIC) for two-dimensional direction finding and signal polarization estimation with electromagnetic vector sensor arrays. Firstly, a detailed analysis of the regular QQ-Model, based on the framework of quad-quaternion, is presented to clarify the exact reason why the regular QQ-MUSIC cannot estimate polarization parameters. Subsequently,...
In this paper, we study the problems with respect to means and pre-orders for fuzzy n - cell numbers. Firstly, we introduce some concepts of vector-valued means and weight number-valued means of fuzzy n - cell numbers, and investigate their properties. And then, bases on these means, we define some binary relations on fuzzy n - cell number space, study their properties, and point out they are weak...
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