This document discloses a solution for improving transmission characteristics of a communication signal transmitted from a transmitter. According to an aspect, a method includes arranging, in a transmitter, information to be transmitted to a receiver, to a plurality of spatial layers where each spatial layer is associated with a unique precoding configuration amongst the plurality of spatial layers, wherein the information includes at least one signal that is identical in a plurality of the plurality of spatial layers; performing, in the transmitter, a decorrelation operation across the plurality of spatial layers such that the at least one signal in one of the plurality of spatial layers becomes decorrelated with the at least one signal in another one of the plurality of spatial layers; and causing, in the transmitter, transmission of a transmission signal including the information in the plurality of spatial layers to the receiver.