| 摘要 |
An apparatus for precoding a multicarrier signal to provide a precoded signal, the multicarrier signal comprising a set of values, each value of the set of values being associated with a carrier frequency of a number of carrier frequencies of a multicarrier modulation scheme, wherein the precoded signal is to be transmitted to a multipath communication channel comprising a first path associated with a first path delay, and a second path associated with a second path delay, wherein the first path delay is larger than a length of a predetermined guard interval to be removed in a multicarrier receiver, comprises means for providing information on the first path delay and on the second path delay, means for weighting the multicarrier signal using the information on the first path delay and the information on the second path delay, wherein the means for weighting is operative for weighting the multicarrier signal such that a time-spread precoded signal is obtained, wherein a length of the time-spread precoded signal corresponds to a sum of a length of the multicarrier signal and of the length of the predetermined guard interval, and wherein the means for weighting is operative for providing the time-spread precoded signal as the precoded signal. Moreover, in the case of a plurality of transmission antennas, simultaneous spreading in time-domain and in space-domain can be performed. In accordance with the present invention, an efficient exploitation of the available bandwidth can be achieved. |
