  A scheme for suppressing the correlated noise in signals transmitted over the
bosonic Gaussian memory channels is proposed. This is a compromise solution
rather than removing the noise completely. The scheme is based on linear
optical elements, two $N$-port splitters and $N$ number of phase flips. The
proposed scheme has the advantages that the correlated noise of the memory
channels are greatly suppressed, and the input signal states can be protected
excellently when transmitting over the noise channels. We examine the
suppressing efficiency of the scheme for the correlated noise, both from
quantum information of the states directly transmitted through the noise
channel and also from the entanglement teleportation. The phase flips are very
important aspects for the suppressions of the correlated noise, which transform
the roles of the memory factor from completely negative to positive in quantum
information communications. Increasing the number of beam splitters also can
improve the suppressing efficiency of the scheme in communications.
