| 摘要 |
A wireless communication terminal apparatus wherein even when a SC-FDMA signal is divided into a plurality of clusters and the plurality of clusters are then mapped to respective discontinuous frequency bands (when C-SC-FDMA is used), the improvement effect of system throughput can be maintained, while the user throughput can be improved. In the apparatus, a DFT unit (210) subjects a symbol sequence of time domain to a DFT process, thereby generating signals of frequency domain. A setting unit (211) divides the signals input from the DFT unit (210) into a plurality of clusters according to a cluster pattern that is in accordance with an MCS set, an encoding size, or the number of Ranks occurring during MIMO transmissions, which is indicated in those signals input, and then maps the plurality of clusters to the respective ones of a plurality of discontinuous frequency resources, thereby setting a constellation of the plurality of clusters in the frequency domain. |
| 主权项 |
1. A communication apparatus comprising:
a discrete Fourier transformer which, in operation, performs Fourier transformations (DFTs) on a plurality of symbol sequences, each symbol sequence corresponding to one of a plurality of layers, wherein the plurality of symbol sequences comprise different code words from each other and a number of the plurality of layers is at least as large as a number of the different code words; a precoder which, in operation, generates a plurality of precoded symbol sequences based on the plurality of DFT performed symbol sequences and a precoding matrix; and a mapper which, in operation, maps each of the plurality of precoded symbol sequences on a same set of discontinuous frequency resources, each frequency resource being located on a separate position from other frequency resources on a frequency axis, wherein the same set of discontinuous frequency resources means that a first set of discontinuous frequency resources, to which a first precoded symbol sequence is mapped, and a second set of discontinuous frequency resources, to which a second precoded symbol sequence is mapped, share at least one of a number of clusters, cluster sizes, and a frequency position of each of the clusters in common, a cluster size being a frequency bandwidth of the discontinuous frequency resource. |
