A linearly constrained wideband adaptive array antenna with orthogonal filter structure

A linearly constrained wideband adaptive array sensor is described whose adaptive processor is realized with a multichannel orthogonal filter structure. It is shown that the transform domain processor utilizing the computationally simple LMS algorithm is capable of convergence speeds which rival the least squares methods which are more expensive to implement. Furthermore, there is no additional cost in terms of the adaptive coefficient requirements (and only a modest increase in nonadaptive computational requirements) when compared to the standard tapped-delay-line structure array utilizing the LMS algorithm.<>