A communication apparatus, comprising: a scheduler, adapted to determine a resource allocation to map each of a plurality of precoded symbol sequences on a same set of discontinuous frequency resources, each of the discontinuous frequency resources being located on a separate position from other frequency resources on a frequency axis, wherein the plurality of precoded symbol sequences are to be generated based on a plurality of DFT transformed symbol sequences and a precoding matrix, each of the plurality of DFT transformed symbol sequences corresponding to one of a plurality of layers and being derived from two codewords, wherein the plurality of precoded symbol sequences share: a number of clusters used to map each precoded symbol sequence; cluster sizes; and a frequency position of each cluster, each of the cluster sizes being a frequency bandwidth of the discontinuous frequency resources and a cluster size is defined according to a minimum cluster size which is common among the plurality of layers, and wherein each of the plurality of precoded symbol sequences is mapped to the same set of discontinuous frequency resources according to a cluster pattern with a narrower frequency interval between a plurality of clusters for a higher modulation level indicated in the MCS set; a transmitter, adapted to transmit information indicating the determined resource allocation; a receiver, adapted to receive a signal including the plurality of precoded symbol sequences which are mapped on the same set of discontinuous frequency resources; and a combiner, adapted to combine the received signal mapped on the discontinuous frequency resources to generate symbol sequences. a scheduler, adapted to determine a resource allocation to map each of a plurality of precoded symbol sequences on a same set of discontinuous frequency resources, each of the discontinuous frequency resources being located on a separate position from other frequency resources on a frequency axis, wherein the plurality of precoded symbol sequences are to be generated based on a plurality of DFT transformed symbol sequences and a precoding matrix, each of the plurality of DFT transformed symbol sequences corresponding to one of a plurality of layers and being derived from two codewords, wherein the plurality of precoded symbol sequences share: a number of clusters used to map each precoded symbol sequence; cluster sizes; and a frequency position of each cluster, each of the cluster sizes being a frequency bandwidth of the discontinuous frequency resources and a cluster size is defined according to a minimum cluster size which is common among the plurality of layers, and wherein each of the plurality of precoded symbol sequences is mapped to the same set of discontinuous frequency resources according to a cluster pattern with a narrower frequency interval between a plurality of clusters for a higher modulation level indicated in the MCS set; wherein the plurality of precoded symbol sequences share: a number of clusters used to map each precoded symbol sequence; cluster sizes; and a frequency position of each cluster, each of the cluster sizes being a frequency bandwidth of the discontinuous frequency resources and a cluster size is defined according to a minimum cluster size which is common among the plurality of layers, and wherein each of the plurality of precoded symbol sequences is mapped to the same set of discontinuous frequency resources according to a cluster pattern with a narrower frequency interval between a plurality of clusters for a higher modulation level indicated in the MCS set; a transmitter, adapted to transmit information indicating the determined resource allocation; a receiver, adapted to receive a signal including the plurality of precoded symbol sequences which are mapped on the same set of discontinuous frequency resources; and a combiner, adapted to combine the received signal mapped on the discontinuous frequency resources to generate symbol sequences.