When adaptive nullsteering is applied to attenuate interfering signals which are received via the main lobe, two limitations manifest themselves: the sidelobe level increases and the peak of the main beam shifts away from the desired look direction (squinted main beam). A two-step method is described which maintains angular accuracy even under main lobe interference conditions. In the first step, adaptive nullsteering is performed to enable the detection of targets; the distortion of the main beam is allowed. In the second step, high-resolution angle estimation techniques are used to obtain the angles of the target and the interference sources. The procedure requires prior knowledge of the number of interfering signals; an interference map can be used to provide this information.<>


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    Title :

    On combining adaptive nullsteering with high resolution angle estimation under main lobe interference conditions


    Contributors:
    Theil, A. (author)


    Publication date :

    1990-11-01


    Size :

    213845 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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