For a single complex sinusoid (cisoid) in complex white Gaussian noise the dependence of the Cramer-Rao (C-R) bounds on the first sampling time is known. In this paper the fırst-sampling-time dependence of the bounds is examined for the two cisoid case. For two cisoids in complex white Gaussian noise it is shown that the largesı and the smallest values of the C-R frequency and amplitude bounds do not depend on the firsı sampling time and that the critica) values of the C-R phase bounds are smallesı when the sampling times are symmetrical.
