BASE STATION APPARATUS AND RESOURCE ALLOCATION METHOD
First Claim
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;
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, a cluster size, and a frequency position of each of the clusters in common, the cluster size being a frequency bandwidth of the discontinuous frequency resource.
1 Assignment
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Accused Products
Abstract
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.
5 Citations
19 Claims
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1. A communication apparatus comprising:
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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; 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, a cluster size, and a frequency position of each of the clusters in common, the cluster size being a frequency bandwidth of the discontinuous frequency resource. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A communication method, performed by a communication apparatus, the method comprising:
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performing discrete Fourier transformations (DFT) on a plurality of symbol sequences, each symbol sequence corresponding to one of a plurality of layers; generating a plurality of precoded symbol sequences based on the plurality of DFT performed symbol sequences and a precoding matrix; and mapping 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, a cluster size, and a frequency position of each of the clusters in common, the cluster size being a frequency bandwidth of the discontinuous frequency resource. - View Dependent Claims (8, 9, 10, 11)
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12. A communication apparatus comprising:
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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; a precoder which, in operation, generates a plurality of precoded symbol sequences based on a 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 to a plurality of frequency resources, each of the plurality of frequency resources being located on a separate position from other frequency resources on a frequency axis, wherein a first plurality of frequency resources to which a first precoded symbol sequence is mapped, and a second plurality of frequency resources to which a second precoded symbol sequence is mapped share;
a number of frequency resources used to map each precoded symbol sequence;
a size; and
a frequency position of each of the frequency resources, the size being a frequency resource bandwidth. - View Dependent Claims (13, 14, 15)
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16. A communication method performed by a communication apparatus, the method comprising:
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performing discrete Fourier transformations (DFT) on a plurality of symbol sequences, each symbol sequence corresponding to one of a plurality of layers; generating a plurality of precoded symbol sequences based on the plurality of DFT performed symbol sequences and a precoding matrix; and mapping each of the plurality of precoded symbol sequences to a plurality of frequency resources, each of the plurality of frequency resources being located on a separate position from other frequency resources on a frequency axis, wherein a first plurality of frequency resources to which a first precoded symbol sequence is mapped, and a second plurality of frequency resources to which a second precoded symbol sequence is mapped share;
a number of frequency resources used to map each precoded symbol sequence;
a size; and
a frequency position of each of the frequency resources, the size being a frequency resource bandwidth. - View Dependent Claims (17, 18, 19)
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Specification