An antenna array can be considered a linear combiner as shown below (a) Derive the optimal Wiener stationary solution to this problem. (b) Derive the adaptive stochastic gradient and LMS solutions....

An antenna array can be considered a “linear combiner” as shown below

(a) Derive the optimal Wiener “stationary” solution to this problem.

(b) Derive the adaptive stochastic gradient and LMS solutions.

(c) Suppose that this represents a two-element antenna array, and we are asked to design an adaptive nulling scheme (sd (t) = 0). What are the optimal weights for this problem?