Analysis of modified SMI method for adaptive array weight control

The performance of the modified sample matrix inverse algorithm is evaluated based on the K-snapshots estimates of thediagonally loaded covariance matrix. O(1/K) approximations of the statistics ofthe array weights, output powers and output power ratios are derived as a function of the amount diagonal loading and the number of K-snapshots used in the covariance matrix estimate. The results of the study are validated by MonteCarlo simulations.