Adaptive processing at multiple frequencies for nonuniform arrays deployed in any environment

In this paper, it is illustrated on how to carry out adaptive processing simultaneously at multiple frequencies using the same antenna array consisting of dissimilar antenna elements nonuniformly spaced and deployed in any environment. First, a transformation method is introduced to account for all non-ideal effects of an antenna deployed in a real environment, such as mutual coupling between the elements, the presence of an imperfect ground, etc. Once the transformation method is applied, an algorithm is introduced to adaptively null out interferers which can came from multiple directions, frequencies and can even be non-coherent.