Radio communication method, radio communication system, and radio transmission apparatus
First Claim
1. A transmission apparatus comprising:
- a spreading section configured to spread transmission data by discrete Fourier transform to generate a first multi-carrier signal in each of a plurality of frequency channels;
a data selection section configured to select, based on control information, one of the first multi-carrier signal and a second multi-carrier signal that is not spread by the spreading section;
a sub-carrier allocation section configured to allocate the first multi-carrier signal to a plurality of sub-carriers using one of a first manner and a second manner in each of the plurality of frequency channels which the first manner being a manner for non-continuously allocating the plurality of sub-carriers in at least a first group and a second group where the first group includes a first portion of the plurality of sub-carriers continuously allocated to form the first group and where the second group includes a second portion of the plurality of sub-carriers continuously allocated to form the second group, and the second manner being a manner for allocating the plurality of sub-carriers continuous to form a single group of sub-carriers, in a case that the data selection section selected the first multi-carrier signal; and
an Radio Frequency (RF) section configured to transmit the first multi-carrier signal simultaneously from each of the plurality of frequency channels.
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Abstract
A transmission apparatus according to the present invention includes: an encoding section; a modulation section; a variable-SF spreading section that performs spreading with variable SF according to control information A from a control section; an IDFT section that performs IDFT on output from the spreading section; a GI inserting section; a parallel/serial conversion section that converts output from the GI inserting section into a serial data sequence; a digital/analog conversion section; and an RF section that transmits a signal from an antenna after converting the signal to a frequency band for analog signal transmission and controlling it to an appropriate transmission power. The control section is configured to generate control information A for determining the variable SF and input the information A to the variable-SF spreading section and the RF section. In control information A, SF is varied depending on transmission power required.
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Citations
12 Claims
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1. A transmission apparatus comprising:
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a spreading section configured to spread transmission data by discrete Fourier transform to generate a first multi-carrier signal in each of a plurality of frequency channels; a data selection section configured to select, based on control information, one of the first multi-carrier signal and a second multi-carrier signal that is not spread by the spreading section; a sub-carrier allocation section configured to allocate the first multi-carrier signal to a plurality of sub-carriers using one of a first manner and a second manner in each of the plurality of frequency channels which the first manner being a manner for non-continuously allocating the plurality of sub-carriers in at least a first group and a second group where the first group includes a first portion of the plurality of sub-carriers continuously allocated to form the first group and where the second group includes a second portion of the plurality of sub-carriers continuously allocated to form the second group, and the second manner being a manner for allocating the plurality of sub-carriers continuous to form a single group of sub-carriers, in a case that the data selection section selected the first multi-carrier signal; and an Radio Frequency (RF) section configured to transmit the first multi-carrier signal simultaneously from each of the plurality of frequency channels. - View Dependent Claims (2, 3, 4)
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5. A transmission method for a transmission apparatus, comprising:
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spreading transmission data by discrete Fourier transform to generate a first multi-carrier signal in each of a plurality of frequency channels; selecting, based on control information, one of the first multi-carrier signal and a second multi-carrier signal that is not spread; allocating the first multi-carrier signal to a plurality of sub-carriers using one of a first manner and a second manner in each of the plurality of frequency channels which the first manner being a manner for non-continuously allocating the plurality of sub-carriers in at least a first group and a second group where the first group includes a first portion of the plurality of sub-carriers continuously allocated to form the first group and where the second group includes a second portion of the plurality of sub-carriers continuously allocated to form the second group, and the second manner being a manner for allocating the plurality of sub-carriers continuous to form a single group of sub-carriers, in a case of selecting the first multi-carrier signal; and transmitting the first multi-carrier signal simultaneously from each of the plurality of frequency channels. - View Dependent Claims (6, 7, 8)
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9. A processor comprising:
a control section configured to perform control of simultaneously transmit, from each of a plurality of frequency channels, a first multi-carrier signal which is allocated to a plurality of sub-carriers using one of a first manner and a second manner in each of the plurality of frequency channels which the first manner being a manner for non-continuously allocating the plurality of sub-carriers in at least a first group and a second group where the first group includes a first portion of the plurality of sub-carriers continuously allocated to form the first group and where the second group includes a second portion of the plurality of sub-carriers continuously allocated to form the second group, and the second manner being a manner for allocating the plurality of sub-carriers continuous to form a single group of sub-carriers, in a case of selecting the first multi-carrier signal as one of a first multi-carrier signal and the second multi-carrier signal, the first multi-carrier signal being generated by spreading transmission data by discrete Fourier transform in each of the plurality of frequency channels, and the second multi-carrier signal being not subjected to spreading. - View Dependent Claims (10, 11)
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12. A processor comprising:
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a sub-carrier allocation section configured to allocate, to a plurality of sub-carriers, one of first and second multi-carrier signals which is selected based on control information, the first multi-carrier signal being generated by spreading transmission data by discrete Fourier transform in each of a plurality of frequency channels, and the second multi-carrier signal being not subjected to spreading, wherein if the first multi-carrier signal is selected, the sub-carrier allocation section is configured to allocate the first multi-carrier signal using anyone of first and second manners in each of the plurality of frequency channels, the first manner being a manner for non-continuously allocating the plurality of sub-carriers in at least a first group and a second group where the first group includes a first portion of the plurality of sub-carriers continuously allocated to form the first group and where the second group includes a second portion of the plurality of sub-carriers continuously allocated to form the second group, and the second manner being a manner for allocating the plurality of sub-carriers continuous to form a single group of sub-carriers.
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Specification