Consider the set of signals
where N is an integer and I = 0;1;2;3;4;5;6;7.
a. Find an orthonormal basis set for the space spanned by this set of signals.
b. Draw a set of coordinate axes, and plot the locations of si(t) , i = 0; 1; 2; ... ; 7, after expressing each one as a generalized Fourier series in terms of the basis set found in part (a).