Open AccessDecoupling self‐correcting method for non‐uniform dual circular array
Author(s) -
Zhang Jiajia,
Chen Hui,
Liu Weijian
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2019.0347
Subject(s) - decoupling (probability) , coupling (piping) , convergence (economics) , computer science , algorithm , matrix (chemical analysis) , dual (grammatical number) , circular buffer , block (permutation group theory) , iterative method , topology (electrical circuits) , mathematics , mathematical optimization , geometry , engineering , mechanical engineering , art , materials science , literature , combinatorics , control engineering , economics , composite material , programming language , economic growth
According to the structural characteristics of non‐uniform dual circular array (NDCA), a new method is proposed to solve the problem of mutual coupling error. In this algorithm, solving the mutual coupling problem of NDCA can be equivalent to solving that of non‐uniform linear array (NLA). Firstly, the mutual coupling matrix is divided into several blocks. Then, each sub‐block can be decomposed into the sum of several matrices with special characteristics by matrix addition method. As a result, the signal angles and mutual coupling coefficients can be conveniently decoupled. Compared with the iterative self‐calibration algorithm, the proposed algorithm has a small amount of calculation. Moreover, it neither requires any prior information nor has problem of local convergence. The new method can accurately estimate the signal directions and mutual coupling coefficients.