TRANSMISSION METHOD, TRANSMISSION APPARATUS, RECEPTION METHOD AND RECEPTION APPARATUS
First Claim
1. A transmission method for transmitting a first transmission signal from one or more first outputs and a second transmission signal from one or more second outputs that differ from the first outputs, the first and the second transmission signal being generated by using one of a plurality of precoding matrices to precode a first and a second modulated signal modulated in accordance with a modulation method, the first and the second modulated signal being composed of an in-phase component and a quadrature component,the precoding matrix used to generate the first and the second transmission signal being regularly switched to another one of the precoding matrices,the transmission method comprising the steps of:
- for a first symbol that is a data symbol used to transmit data of the first modulated signal and a second symbol that is a data symbol used to transmit data of the second modulated signal, when a first time and a first frequency at which the first symbol is to be precoded and transmitted match a second time and a second frequency at which the second symbol is to be precoded and transmitted, two third symbols adjacent to the first symbol in the frequency domain are both data symbols, and two fourth symbols adjacent to the first symbol in the time domain are both data symbols,generating the first transmission signal by precoding the first symbol, the two third symbols, and the two fourth symbols, the first symbol being precoded with a different precoding matrix than each of the two third symbols and the two fourth symbols;
generating the second transmission signal by precoding the second symbol, two fifth symbols adjacent to the second symbol in the frequency domain, and two sixth symbols adjacent to the second symbol in the time domain each with the same precoding matrix used to precode a symbol at a matching time and frequency among the first symbol, the two third symbols, and the two fourth symbols;
outputting the generated first transmission signal from the one or more first outputs; and
outputting the generated second transmission signal from the one or more second outputs.
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Accused Products
Abstract
All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.
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Citations
16 Claims
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1. A transmission method for transmitting a first transmission signal from one or more first outputs and a second transmission signal from one or more second outputs that differ from the first outputs, the first and the second transmission signal being generated by using one of a plurality of precoding matrices to precode a first and a second modulated signal modulated in accordance with a modulation method, the first and the second modulated signal being composed of an in-phase component and a quadrature component,
the precoding matrix used to generate the first and the second transmission signal being regularly switched to another one of the precoding matrices, the transmission method comprising the steps of: -
for a first symbol that is a data symbol used to transmit data of the first modulated signal and a second symbol that is a data symbol used to transmit data of the second modulated signal, when a first time and a first frequency at which the first symbol is to be precoded and transmitted match a second time and a second frequency at which the second symbol is to be precoded and transmitted, two third symbols adjacent to the first symbol in the frequency domain are both data symbols, and two fourth symbols adjacent to the first symbol in the time domain are both data symbols, generating the first transmission signal by precoding the first symbol, the two third symbols, and the two fourth symbols, the first symbol being precoded with a different precoding matrix than each of the two third symbols and the two fourth symbols; generating the second transmission signal by precoding the second symbol, two fifth symbols adjacent to the second symbol in the frequency domain, and two sixth symbols adjacent to the second symbol in the time domain each with the same precoding matrix used to precode a symbol at a matching time and frequency among the first symbol, the two third symbols, and the two fourth symbols; outputting the generated first transmission signal from the one or more first outputs; and outputting the generated second transmission signal from the one or more second outputs. - View Dependent Claims (2, 3, 4)
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5. A transmission method for transmitting a first transmission signal from one or more first outputs and a second transmission signal from one or more second outputs that differ from the first outputs, the first and the second transmission signal being generated by using one of a plurality of precoding matrices to precode a first and a second modulated signal modulated in accordance with a modulation method, the first and the second modulated signal being composed of an in-phase component and a quadrature component,
the precoding matrix used to generate the first and the second transmission signal being regularly switched to another one of the precoding matrices, the transmission method comprising the steps of: -
allocating different precoding matrices to data symbols included in a first range of i×
j, i being a number of consecutive symbols in the frequency domain, and j being a number of consecutive symbols in the time domain, and precoding the data symbols in order to generate a first transmission signal;precoding each data symbol in a second range located within the second modulated signal and corresponding to the first range, using the precoding matrix allocated to a data symbol included in the first range and matching the data symbol in the second range in time and frequency, in order to generate a second transmission signal; and transmitting the generated first and second transmission signals. - View Dependent Claims (6, 7)
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8. A transmission apparatus for transmitting a first transmission signal from one or more first outputs and a second transmission signal from one or more second outputs that differ from the first outputs, the first and the second transmission signal being generated by using one of a plurality of precoding matrices to precode a first and a second modulated signal modulated in accordance with a modulation method, the first and the second modulated signal being composed of an in-phase component and a quadrature component,
the precoding matrix used to generate the first and the second transmission signal being regularly switched to another one of the precoding matrices, the transmission apparatus comprising: -
a precoding weight generating unit operable to allocate precoding matrices, wherein for a first symbol that is a data symbol used to transmit data of the first modulated signal and a second symbol that is a data symbol used to transmit data of the second modulated signal, when a first time and a first frequency at which the first symbol is to be precoded and transmitted match a second time and a second frequency at which a second symbol is to be precoded and transmitted, two third symbols adjacent to the first symbol in the frequency domain are both data symbols, and two fourth symbols adjacent to the first symbol in the time domain are both data symbols, the precoding weight generating unit allocates precoding matrices to the two third symbols and the two fourth symbols that differ from the precoding matrix allocated to the first symbol, and allocates the same precoding matrix used to precode a symbol at a matching time and frequency among the first symbol, the two third symbols, and the two fourth symbols to each of the second symbol, two fifth symbols adjacent to the second symbol in the frequency domain, and two sixth symbols adjacent to the second symbol in the time domain; a weighting unit operable to generate the first transmission signal and the second transmission signal by weighting the first modulated signal and the second modulated signal with the allocated precoding matrices; and a transmission unit operable to transmit the generated first transmission signal from the one or more first outputs and the generated second transmission signal from the one or more second outputs. - View Dependent Claims (9, 10, 11)
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12. A transmission apparatus for transmitting a first transmission signal from one or more first outputs and a second transmission signal from one or more second outputs that differ from the first outputs, the first and the second transmission signal being generated by using one of a plurality of precoding matrices to precode a first and a second modulated signal modulated in accordance with a modulation method, the first and the second modulated signal being composed of an in-phase component and a quadrature component, wherein
the precoding matrix used to generate the first and the second transmission signal is regularly switched to another one of the precoding matrices, the transmission apparatus comprising: -
a precoding weight generating unit operable to allocate different precoding matrices to data symbols included in a first range of i×
j, i being a number of consecutive symbols in the frequency domain, and j being a number of consecutive symbols in the time domain, and allocate, to each data symbol in a second range located within the second modulated signal and corresponding to the first range, the precoding matrix allocated to a data symbol included in the first range and matching the data symbol in the second range in time and frequency;a weighting unit operable to generate the first transmission signal and the second transmission signal by weighting the first modulated signal and the second modulated signal with the allocated precoding matrices; and a transmission unit operable to transmit the generated first transmission signal from the one or more first outputs and the generated second transmission signal from the one or more second outputs. - View Dependent Claims (13, 14)
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15. A reception method for receiving a first and a second transmission signal precoded and transmitted by a transmission apparatus, wherein
the first and the second transmission signal are generated by using one of a plurality of precoding matrices, while regularly hopping between the precoding matrices, to precode a first and a second modulated signal modulated in accordance with a modulation method, the first and the second modulated signal being composed of an in-phase component and a quadrature component, for a first symbol that is a data symbol used to transmit data of the first modulated signal and a second symbol that is a data symbol used to transmit data of the second modulated signal, when a first time and a first frequency at which the first symbol is to be precoded and transmitted match a second time and a second frequency at which the second symbol is to be precoded and transmitted, two third symbols adjacent to the first symbol in the frequency domain are both data symbols, and two fourth symbols adjacent to the first symbol in the time domain are both data symbols, then the first transmission signal is generated by precoding the first symbol, the two third symbols, and the two fourth symbols, the first symbol being precoded with a different precoding matrix than each of the two third symbols and the two fourth symbols, and the second transmission signal is generated by precoding the second symbol, two fifth symbols adjacent to the second symbol in the frequency domain, and two sixth symbols adjacent to the second symbol in the time domain with the same precoding matrix used to precode a symbol at a matching time and frequency among the first symbol, the two third symbols, and the two fourth symbols, the reception method comprising the steps of: -
receiving the first and the second transmission signal; and demodulating the first and the second transmission signal using a demodulation method in accordance with the modulation method and performing error correction decoding to obtain data.
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16. A reception apparatus for receiving a first and a second transmission signal precoded and transmitted by a transmission apparatus, wherein
the first and the second transmission signal are generated by using one of a plurality of precoding matrices, while regularly hopping between the precoding matrices, to precode a first and a second modulated signal modulated in accordance with a modulation method, the first and the second modulated signal being composed of an in-phase component and a quadrature component, for a first symbol that is a data symbol used to transmit data of the first modulated signal and a second symbol that is a data symbol used to transmit data of the second modulated signal, when a first time and a first frequency at which the first symbol is to be precoded and transmitted match a second time and a second frequency at which the second symbol is to be precoded and transmitted, two third symbols adjacent to the first symbol in the frequency domain are both data symbols, and two fourth symbols adjacent to the first symbol in the time domain are both data symbols, then the first transmission signal is generated by precoding the first symbol, the two third symbols, and the two fourth symbols, the first symbol being precoded with a different precoding matrix than each of the two third symbols and the two fourth symbols, the second transmission signal is generated by precoding the second symbol, two fifth symbols adjacent to the second symbol in the frequency domain, and two sixth symbols adjacent to the second symbol in the time domain with the same precoding matrix used to precode a symbol at a matching time and frequency among the first symbol, the two third symbols, and the two fourth symbols, the first and the second transmission signal are received, and the first and the second transmission signal are demodulated using a demodulation method in accordance with the modulation method and performing error correction decoding to obtain data.
Specification