Wireless communication apparatus and method for wireless communication
A wireless communication technology which realizes high-speed transmission while making effective use of existing frequency bands. A wireless communication apparatus includes a communication unit to perform a wireless communication with a target communication device by simultaneously using a plurality of carrier frequency bands each of which has a specified bandwidth and is discontinuous between each carrier frequency-band interval.
1. A wireless terminal, comprising a communication unit configured to perform wireless communication to one or more target communication devices by simultaneously using a plurality of carrier frequency bands each having a specified bandwidth, the plurality of carrier frequency bands being discontinuous therebetween, wherein the communication unit comprises:
a first radio reception unit configured to generate a first baseband multicarrier signal based on a radio signal of a first carrier frequency band;
a second radio reception unit configured to generate a second baseband multicarrier signal based on a radio signal of a second carrier frequency band; and
a baseband processing unit configured to generates a first decoded signal based on a first baseband multicarrier signal corresponding to a bandwidth of a first carrier frequency band among the plurality of carrier frequency bands, and a second decoded signal based on a second baseband multicarrier signal corresponding to a bandwidth of a second carrier frequency among the plurality of carrier frequency bands.
2. The wireless terminal according to claim 1 , wherein the baseband processing unit comprises:
a first FFT unit configured to generates perform FFT processing on the first baseband multicarrier signal by performing FFT processing based on a FFT size corresponding to the bandwidth of the first carrier frequency band; and
a second FFT unit configured to perform FFT processing on the second baseband multicarrier signal by performing FFT processing based on an FFT size corresponding to the bandwidth of the second carrier frequency band.
3. The wireless terminal according to claim 1 , further comprising an interface unit configured to connect the baseband processing unit to the first radio reception unit and the second radio reception unit by using predetermined interface signals,
wherein the interface unit comprises:
an assignment unit configured to assigns the first baseband multicarrier signal and the second baseband multicarrier signal, which are input to the baseband processing unit, from the first radio reception unit or the second radio reception unit based on the plurality of carrier frequency bands; and
an interface signal generation unit configured to map, based on an assignment result obtained by the assignment unit, the first baseband multicarrier signal and the second baseband multicarrier signal to the predetermined interface signals.
4. The wireless terminal according to claim 1 , wherein the baseband processing unit further comprises a control unit configured to receives, from the target communication device, a notification regarding band information on a newly allocated carrier frequency band among the plurality of carrier frequency bands, and performs specified setting on reception the radio signal of a first carrier frequency band and the radio signal of a second carrier frequency band based on the newly allocated band information.
5. A wireless communication method, comprising: performing wireless communication to one or more target communication devices by simultaneously using a plurality of carrier frequency bands each having a specified bandwidth, the plurality of carrier frequency bands being discontinuous therebetween, wherein the performing wireless communication includes:
generating a first baseband multicarrier signal based on a radio signal of a first carrier frequency band;
generating a second baseband multicarrier signal based on a radio signal of a second carrier frequency band; and
generating a first decoded signal based on the first baseband multicarrier signal corresponding to a bandwidth of a first carrier frequency band among the plurality of carrier frequency bands, and a second decoded signal based on the second baseband multicarrier signal corresponding to a bandwidth of a second carrier frequency among the plurality of carrier frequency bands.
6. The wireless communication method according to claim 5 , wherein the generating the first-and-second decoded signals includes:
performing FFT processing on the first baseband multicarrier signal by performing FFT processing based on a FFT size corresponding to the bandwidth of the first carrier frequency band; and
performing FFT processing on the second baseband multicarrier signal by performing FFT processing based on a FFT size corresponding to the bandwidth of the second carrier frequency band.
7. The wireless communication method according to claim 5 , wherein the generating the first-and-second baseband multicarrier signals further including:
assigning the first baseband multicarrier signal and the second baseband multicarrier signal which are input from the generating the first baseband multicarrier signal based on the radio signal of the first carrier frequency band or the generating the second baseband multicarrier signal based on the radio signal of the second carrier frequency band; and
mapping, based on the assignment result, the first baseband multicarrier signal and the second baseband multicarrier signal to a predetermined interface signals.
8. The wireless communication method according to claim 5 , wherein the generating the first-and-second decoded signals further includes:
receiving, from the target communication device, a notification regarding band information on a newly allocated carrier frequency band among the plurality of carrier frequency bands; and
performing specified setting on reception of the radio signal of a first carrier frequency band and the radio signal of a second carrier frequency band based on the newly allocated band information.