Recursive Methods for Adaptive Array Processing

Abstract

This chapter discusses the weighted least squares error processor, updated covariance matrix inverse, Kalman filter methods for adaptive array processing, minimum variance processor and simulation results. The specific form selected for a recursive processor should reflect the data weight scheme that is appropriate for the desired application. The various recursive algorithms may be developed by applying the matrix inversion lemma to the same basic weight update equation. Since the recursive algorithms are different from a DMI algorithm, primarily because the required matrix inversion is accomplished in a recursive manner, it is hardly surprising that many of the desirable properties found to apply to DMI algorithms also hold for recursive algorithms. Rapid convergence rates and insensitivity to eigenvalue spread are characteristics that make recursive processors attractive algorithm candidates provided sufficient computational power and accuracy are available to carry out the required calculations.