  A linear transmitter with correlated Gaussian white additive and
multiplicative noises and a periodic signal coupled either additively or
multiplicatively is considered. The correlations have a weak destructive effect
in case of the additive signal and a strong constructive effect in case of the
multiplicative one. Analytical results for the linear transmitter with the
additive signal agree with those obtained previously by a different approach.
We also show how to analytically calculate certain expectation values involving
exponentials of Gaussian processes.
