Consider the 7-bit Barker code, designated by the sequence x(n).

(a) Compute and plot the autocorrelation of this code.

(b) A radar uses binary phase coded pulses of the form s(t) = r(t) cos(2fot), where6.14. A pulse train y(t) is given by 2 y(t) = w(n)x(t-nt') n = 0 where x(t) = exp(-1/2) is a single pulse of duration t' and the weighting sequence is {w(n)} = {0.5, 1, 0.7}. Find and sketch the correlations R., Rw, and Ry-