We derive expressions for the Cramer-Rao Bound (CRB) for the estimates
of the parameters of a deterministic signal observed in additive and
multiplicative noise which may be i.i.d. non-Gaussian or colored Gauss
ian. General expressions for the CRB are derived, and are then applied
to the specific case of polynomial phase signals for which closed-for
m expressions are obtained under certain assumptions, We also develop
bounds on the CRB; these bounds are tight at low SNR.