Cramer–Rao Lower Bound for Constrained Complex Parameters
Aditya K. Jagannatham, Bhaskar D. Rao · IEEE Signal Processing Letters · 2004
An expression for the Cramer-Rao lower bound (CRB) on the covariance of unbiased estimators of a constrained complex parameter vector is derived. The application and usefulness of the result is demonstrated through its use in the context of a semiblind channel estimation problem.