Wireless communication apparatus and wireless communication system
First Claim
Patent Images
1. A wireless communication apparatus comprising:
- a modulation circuit that generates a plurality of data signals containing identical data each in one of a plurality of carrier frequency bands; and
a plurality of antennas via which the plurality of data signals outputted from the modulation circuit are transmitted each in a corresponding one of the plurality of carrier frequency bands.
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Abstract
A data transmission apparatus transmits data signals “S1” and “S2” containing identical serial data “ds” in two frequency bands, and a data reception apparatus receives those data signals “S1” and “S2.” Parallel data “dpl” and “dpl2” obtained from the data signals “S1” and “S2” is subjected to selection or synthesis in a subcarrier selection/demodulation circuit so as to be demodulated into serial data “dsx,” which is then outputted to a MAC section.
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Citations
19 Claims
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1. A wireless communication apparatus comprising:
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a modulation circuit that generates a plurality of data signals containing identical data each in one of a plurality of carrier frequency bands; and
a plurality of antennas via which the plurality of data signals outputted from the modulation circuit are transmitted each in a corresponding one of the plurality of carrier frequency bands. - View Dependent Claims (2, 3)
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4. A wireless communication apparatus, comprising:
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a plurality of antennas via which are received data signals each transmitted in one of a plurality of carrier frequency bands;
a plurality of frequency conversion circuits that convert the data signals received respectively via the plurality of antennas into a plurality of baseband signals having an identical frequency; and
a demodulation circuit that, based on the plurality of baseband signals obtained respectively from the plurality of frequency conversion circuits, checks reception condition in the carrier frequency bands corresponding respectively to the plurality of data signals and selects the baseband signal obtained from the data signal in the carrier frequency band in which reception condition is found best and that then demodulates the thus selected baseband signal, wherein the data signals transmitted respectively in the plurality of carrier frequency bands contain identical data. - View Dependent Claims (5)
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6. A wireless communication apparatus comprising:
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a plurality of antennas via which are received data signals each transmitted in one of a plurality of carrier frequency bands;
a plurality of frequency conversion circuits that convert the data signals received respectively via the plurality of antennas into a plurality of baseband signals having an identical frequency; and
a demodulation circuit that synthesizes together the plurality of baseband signals obtained respectively from the plurality of frequency conversion circuits into a single baseband signal and that then demodulates the thus synthesized baseband signal;
wherein the data signals transmitted respectively in the plurality of carrier frequency bands contain identical data. - View Dependent Claims (7)
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8. A wireless communication apparatus comprising:
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n (where n is an integer equal to or greater than
2) antennas via which are received data signals modulated by an OFDM modulation method and transmitted in n carrier frequency bands;
n frequency conversion circuits that convert the data signals received respectively via the n antennas into baseband signals having an identical frequency;
n Fourier transform circuits that, based on the plurality of baseband signals obtained respectively from the n frequency conversion circuits, generate parallel data containing data segments each relating to one of m (where m is an integer equal to or greater than
2) subcarriers;
n data correction circuits that, based on the parallel data fed respectively from the n Fourier transform circuits, check reception condition of each of the m subcarriers in the respective carrier frequency bands and accordingly correct the parallel data;
a data selection circuit that receives the n sets of parallel data corrected by the n data correction circuits and that then, for each of the m subcarriers, recognizes the carrier frequency band in which reception condition is best and that then selects the data in the thus recognized carrier frequency band so as to thereby newly generate parallel data containing m data segments; and
a demodulation circuit that converts the parallel data newly generated by the data selection circuit into serial data, wherein the parallel data contained in the data signals transmitted respectively in the plurality of carrier frequency bands contains identical data. - View Dependent Claims (9, 10)
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11. A wireless communication apparatus comprising:
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n (where n is an integer equal to or greater than
2) antennas via which are received data signals modulated by an OFDM modulation method and transmitted in n carrier frequency bands;
n frequency conversion circuits that convert the data signals received respectively via the n antennas into baseband signals having an identical frequency;
n Fourier transform circuits that, based on the plurality of baseband signals obtained respectively from the n frequency conversion circuits, generate parallel data containing data segments each relating to one of m (where m is an integer equal to or greater than
2) subcarriers;
n data correction circuits that, based on the parallel data fed respectively from the n Fourier transform circuits, check reception condition of each of the m subcarriers in the respective carrier frequency bands and accordingly correct the parallel data;
a data synthesis circuit that receives the n sets of parallel data corrected by the n data correction circuits and that then, for each of the m subcarriers, synthesizes the data so as to thereby newly generate parallel data containing m data segments; and
a demodulation circuit that converts the parallel data newly generated by the data synthesis circuit into serial data, wherein the parallel data contained in the data signals transmitted respectively in the plurality of carrier frequency bands contains identical data. - View Dependent Claims (12, 13)
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14. A wireless communication apparatus comprising:
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n (where n is an integer equal to or greater than
2) antennas via which are received data signals modulated by an OFDM modulation method and transmitted in n carrier frequency bands;
n frequency conversion circuits that convert the data signals received respectively via the n antennas into baseband signals having an identical frequency;
n Fourier transform circuits that, based on the plurality of baseband signals obtained respectively from the n frequency conversion circuits, generate parallel data containing data segments each relating to one of m (where m is an integer equal to or greater than
2) subcarriers;
a data selection circuit that receives the n sets of parallel data obtained from the n Fourier transform circuits and that then, for each of the m subcarriers, recognizes the carrier frequency band in which reception condition is best and that then selects the data in the thus recognized carrier frequency band so as to thereby newly generate parallel data containing m data segments;
a data correction circuit that, based on the parallel data newly generated by the data selection circuit, checks reception condition of each of the m subcarriers in the respective carrier frequency bands and accordingly correct the parallel data; and
a demodulation circuit that converts the parallel data corrected by the data correction circuit into serial data, wherein the parallel data contained in the data signals transmitted respectively in the plurality of carrier frequency bands contains identical data.
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15. A wireless communication system comprising:
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a data transmission apparatus built with a wireless communication apparatus that comprises;
a modulation circuit that generates a plurality of data signals containing identical data each in one of a plurality of carrier frequency bands, and a plurality of antennas via which the plurality of data signals outputted from the modulation circuit are transmitted each in a corresponding one of the plurality of carrier frequency bands; and
a data reception apparatus built with the wireless communication apparatus that comprises;
a plurality of antennas which receive data signals each transmitted in one of a plurality of carrier frequency bands, a plurality of frequency conversion circuits that convert the data signals received respectively via the plurality of antennas into a plurality of baseband signals having an identical frequency, and a demodulation circuit that, based on the plurality of baseband signals obtained respectively from the plurality of frequency conversion circuits, checks reception condition in the carrier frequency bands corresponding respectively to the plurality of data signals and selects the baseband signal obtained from the data signal in the carrier frequency band in which reception condition is found best and that then demodulates the thus selected baseband signal, wherein a plurality of data signals containing identical data are transmitted and received in the plurality of carrier frequency bands.
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16. A wireless communication system comprising:
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a data transmission apparatus built with the wireless communication apparatus that comprises;
a modulation circuit that generates a plurality of data signals containing identical data each in one of a plurality of carrier frequency bands, and a plurality of antennas via which the plurality of data signals outputted from the modulation circuit are transmitted each in a corresponding one of the plurality of carrier frequency bands; and
a data reception apparatus built with the wireless communication apparatus that comprises;
a plurality of antennas which receive data signals each transmitted in one of a plurality of carrier frequency bands, a plurality of frequency conversion circuits that convert the data signals received respectively via the plurality of antennas into a plurality of baseband signals having an identical frequency, and a demodulation circuit that synthesizes together the plurality of baseband signals obtained respectively from the plurality of frequency conversion circuits into a single baseband signal and that then demodulates the thus synthesized baseband signal, wherein a plurality of data signals containing identical data are transmitted and received in the plurality of carrier frequency bands.
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17. A wireless communication system comprising:
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a data transmission apparatus built with the wireless communication apparatus that comprises;
a predetermined modulation method, used by the modulator, that is an OFDM method; and
a data reception apparatus built with the wireless communication apparatus that comprises;
n (where n is an integer equal to or greater than
2) antennas which receive data signals modulated by an OFDM modulation method and transmitted in n carrier frequency bands,n frequency conversion circuits that convert the data signals received respectively via the n antennas into baseband signals having an identical frequency, n Fourier transform circuits that, based on the plurality of baseband signals obtained respectively from the n frequency conversion circuits, generate parallel data containing data segments each relating to one of m (where m is an integer equal to or greater than
2) subcarriers,n data correction circuits that, based on the parallel data fed respectively from the n Fourier transform circuits, check reception condition of each of the m subcarriers in the respective carrier frequency bands and accordingly correct the parallel data, a data selection circuit that receives the n sets of parallel data corrected by the n data correction circuits and that then, for each of the m subcarriers, recognizes the carrier frequency band in which reception condition is best and that then selects the data in the thus recognized carrier frequency band so as to thereby newly generate parallel data containing m data segments, and a demodulation circuit that converts the parallel data newly generated by the data selection circuit into serial data, wherein a plurality of data signals containing identical data are transmitted and received in the plurality of carrier frequency bands.
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18. A wireless communication system comprising:
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a data transmission apparatus built with the wireless communication apparatus that comprises;
a predetermined modulation method, used by the modulator, that is an OFDM method; and
a data reception apparatus built with the wireless communication apparatus that comprises;
n (where n is an integer equal to or greater than
2) antennas which receive data signals modulated by an OFDM modulation method and transmitted in n carrier frequency bands,n frequency conversion circuits that convert the data signals received respectively via the n antennas into baseband signals having an identical frequency, n Fourier transform circuits that, based on the plurality of baseband signals obtained respectively from the n frequency conversion circuits, generate parallel data containing data segments each relating to one of m (where m is an integer equal to or greater than
2) subcarriers.n data correction circuits that, based on the parallel data fed respectively from the n Fourier transform circuits, check reception condition of each of the m subcarriers in the respective carrier frequency bands and accordingly correct the parallel data, a data synthesis circuit that receives the n sets of parallel data corrected by the n data correction circuits and that then, for each of the m subcarriers, synthesizes the data so as to thereby newly generate parallel data containing m data segments, and a demodulation circuit that converts the parallel data newly generated by the data synthesis circuit into serial data, wherein a plurality of data signals containing identical data are transmitted and received in the plurality of carrier frequency bands.
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19. A wireless communication system comprising:
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a data transmission apparatus built with the wireless communication apparatus that comprises;
a predetermined modulation method, used by the modulator, that is an OFDM method; and
a data reception apparatus built with the wireless communication apparatus that comprises;
n (where n is an integer equal to or greater than
2) antennas via which are received data signals modulated by an OFDM modulation method and transmitted in n carrier frequency bands,n frequency conversion circuits that convert the data signals received respectively via the n antennas into baseband signals having an identical frequency, n Fourier transform circuits that, based on the plurality of baseband signals obtained respectively from the n frequency conversion circuits, generate parallel data containing data segments each relating to one of m (where m is an integer equal to or greater than
2) subcarriers,a data selection circuit that receives the n sets of parallel data obtained from the n Fourier transform circuits and that then, for each of the m subcarriers, recognizes the carrier frequency band in which reception condition is best and that then selects the data in the thus recognized carrier frequency band so as to thereby newly generate parallel data containing m data segments, a data correction circuit that, based on the parallel data newly generated by the data selection circuit, checks reception condition of each of the m subcarriers in the respective carrier frequency bands and accordingly correct the parallel data, and a demodulation circuit that converts the parallel data corrected by the data correction circuit into serial data, wherein a plurality of data signals containing identical data are transmitted and received in the plurality of carrier frequency bands.
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Specification