A partially adaptive array is one in which elements of a phased array are controlled or adaptively weighted in groups or in which certain elements, called auxiliary elements, are made controllable. Mathematically, this type of array is formed by transforming all of the elements of an array by a nonsquare matrix such that the resulting output vector has a length less than the number of array elements. It is shown that there is an equivalent matrix transform that can effectively be utilized in analyzing the partially adaptive array's performance when a small number of external jammers are present. Processor implementation and convergence rate considerations lead to the desirability of reducing the dimensionality of the cancellation processor while maintaining good sidelobe interference protection. A meaningful measure of canceller performance is to compute the optimal output signal-to-noise ratio. This expression is a function of the jammer, direction-of-arrival vectors (DOAVs), jammer powers, the array steering vector, and internal noise. It is shown that if this expression is computed for the fully adaptive array then it is easily computed for the partially adaptive array by transforming the jammer DOAVs and the steering vector by the orthogonal projection matrix defined by the rows of the subarray transformation matrix and substituting these vectors back into the original expression for the fully adaptive array.<>


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Equivalent transformation for a partially adaptive array


    Beteiligte:
    Gerlach, K. (Autor:in)


    Erscheinungsdatum :

    01.11.1990


    Format / Umfang :

    242163 byte




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





    Simple Partially Adaptive Antenna Array Techniques for Interference Detection and Elimination

    Aboul-Dahab, M. A. / El-Khamy, S. E. / Electromagnetics Academy et al. | British Library Conference Proceedings | 1993


    Geometric Illustration Of Equivalent Transformation Method

    Krasilshikov, Mihkail Naumovi / Malyshev, Veniamin Vasily / Karlov, Valeri Ivanovic | AIAA | 1992


    Partially flexible solar array structure

    BAGHDASARIAN VAROUJ | Europäisches Patentamt | 2024

    Freier Zugriff