Abstract: Embodiments of the present disclosure are related to transmitter and method of transmitting a signal stream from a plurality of antennas, in a communication network. The method comprises grouping, by a transmitter, a plurality of consecutive signals of the input to obtain a plurality of groups. Also, the method comprises generating a plurality of physical resource groups (PRGs) using the plurality of groups and a corresponding plurality of subcarriers and precoding each of the PRGs using one or more weighing coefficients to obtain precoded plurality of groups. Further, the method comprises processing the precoded plurality of groups to obtain a processed plurality of groups and transmitting the plurality of processed signal groups using a corresponding plurality of antennas. An indication about variation of the weighing coefficients corresponding to each of plurality of PRGs is provided by the transmitter to the one or more receivers.