Consider a two-user, synchronous CDMA transmission system, where the received signal is...

Consider a two-user, synchronous CDMA transmission system, where the received signal is

and (b1, b2) = . The noise process n(t) is zero-mean Gaussian and white, with spectral density N0/2. The demodulator for r (t) is shown in Figure P16.6.

a. Show that the correlator outputs r1 and r2 at t = T may be expressed as

b. Determine the variances of n1 and n2 and the covariance of n1 and n2.

c. Determine the joint PDF p(r1, r2|b1, b2).