“…In the first example, the true channel matrices are modelled as (3) with Θ i = I N i , i = 1, 2, and Φ i , i = 1, 2, are defined as Toeplitz matrices [5]- [9] with elements given by [Φ 1 ] m,n = 0.8 |m−n| and [Φ 2 ] m,n = 0.9 |m−n| , respectively. Fig.…”