Apparatus, Method and Computer Program for a Receiver and a Transmitter

摘要

Embodiments provide an apparatus, a method and a computer program for a receiver and a transmitter. The apparatus 10 for a receiver comprises means for receiving 12 a receive symbol. The receive symbol is based on a transmit symbol transmitted by a transmitter. The transmit symbol is based on two or more payload data symbols comprising information on payload data. The apparatus further comprises means for estimating 14 a radio channel between the transmitter and the receiver based on the receive symbol and for estimating the payload data comprised in the transmit symbol based on the receive symbol. The apparatus 10 further comprises means for detecting 16 the payload data based on the estimated payload data. The transmitter apparatus being operable to transmit a plurality of transmit symbols. A transmit symbol being based on two or more payload data symbols comprising information on payload data. The transmitter apparatus is operable to transmit the plurality of transmit symbols on a plurality of transmit antennas based on a space-time precoding scheme, wherein the space time precoding scheme applies a phase shift to at least one of simultaneously transmitted transmit symbols, and wherein the phase shift is applied to different transmit symbols in different time instances of the space time precoding scheme.