A method is proposed to optimally place the sensors of an ambiguity-free planar antenna array in order to ensure a constant and minimal (mean square) error on the estimated angle of arrival, and so regardless of the source actual direction of arrival (DOA). It is obtained as a simplification, in the case of axis-symmetrical arrays, of a previously proposed systematic-search-based method. The exponential complexity of the technique is drastically reduced by halving the number of unknowns, and large-sized optimal isotropic arrays are computed. They show an increasing (as the number of sensors increases) gain w.r.t. circular arrays, and exhibit a Cramer-Rao bound (CRB) reduced by an asymptotic 29% relatively to their circular counterparts.


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    Title :

    Optimum Antenna Arrays for Isotropic Direction Finding


    Contributors:


    Publication date :

    2011-04-01


    Size :

    1255676 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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