The autocorrelation array of a 4 x 1 zero mean vector u is given by
![2215_a9683743-4854-4409-bf8b-522bbe97f1e6.png](https://secure.tutorsglobe.com/CMSImages/2215_a9683743-4854-4409-bf8b-522bbe97f1e6.png)
a. What is the KL transform of u?
b. Compare the basis vectors of the KL transform with the basis vectors of the 4 x 4 unitary DFf, OCT, DST, Hadamard, Haar, and Slant transforms. c. Compare the performance of the various transforms by plotting the basis restriction error Im versus m
b. Compare the performance of these transforms for this random field by plotting the mean square error for sample reduction ratios of 2, 4, 8, and 16