  We compute numerically the scalar- and tensor-mode induced Stokes parameters
of the cosmic microwave background, by taking into account the basis rotation
effects. It is found that the tensor contribution to the polarization power
spectrum get enhanced and dominates over the scalar contribution for low
multipoles in a universe with or without recombination. Furthermore, we show
that all full-sky averaged two-point cross-correlation functions of the Stokes
parameters vanish. We thus comment on the cross-correlation between the
anisotropy and polarization of the CMB, and calculate the expected signal to
noise ratio for the polarization experiment underway.
