Wireless communication apparatus and frequency hopping method
Disclosed are a wireless communication apparatus and frequency hopping method which minimize the change in the instantaneous power distribution characteristics of the time waveform of transmission signals when a plurality of channels are multiplexed by frequency division. At a terminal ( 200 ), a mapping unit ( 212 ) maps the PUCCH to frequency resources of a first slot, maps the PUSCH to frequency resources, among the frequency resources of the first slot, separated exactly by predetermined frequency spacing (B) from the frequency resources to which the PUCCH is mapped, and cyclically shifts the frequencies so as to map the PUCCH and PUSCH to frequency resources, within an IDFT or IFFT bandwidth, of a second slot while maintaining the predetermined frequency spacing (B), thereby allowing frequency hopping of the PUCCH and PUSCH between the first slot and the second slot.
1. A terminal apparatus configured with a plurality of downlink component carriers comprising:
a reception section configured to receive downlink control information for each of the plurality of downlink component carriers; and
a transmission section configured to transmit a signal on a frequency resource, the frequency resource including a first frequency resource and a second frequency resource of an uplink channel and being determined from resource information included in the downlink control information, with a frequency hopping between the first frequency resource in a first slot and the second frequency resource in a second slot within a subframe,
wherein a frequency hopping interval between the first frequency resource and the second frequency resource that are determined from the resource information included in the downlink control information for one of the plurality of downlink component carriers is the same as that for another one of the plurality of downlink component carriers.
2. The terminal apparatus according to claim 1 , wherein the frequency hopping interval is common among the downlink control information for all of the plurality of downlink component carriers, with which the terminal apparatus is configured.
3. The terminal apparatus according to claim 1 , wherein the downlink control information for the plurality of downlink component carriers, with which the terminal apparatus is configured, is transmitted from a base station at the same time.
4. The terminal apparatus according to claim 1 , wherein the downlink control information for the plurality of downlink component carriers, with which the terminal apparatus is configured, is transmitted from a base station at different times.
5. The terminal apparatus according to claim 1 , wherein the frequency resource is configured in advance.
6. The terminal apparatus according to claim 5 , wherein the frequency resource is notified in advance by UE-specific signaling in a radio resource control (RRC).
7. The terminal apparatus according to claim 5 , wherein the frequency resource is indirectly or implicitly notified by the resource information.
8. The terminal apparatus according to claim 1 , wherein the frequency hopping interval between the first frequency resource and the second frequency resource is determined from the resource information.
9. The terminal apparatus according to claim 1 , wherein the frequency resource is a resource block.
10. The terminal apparatus according to claim 1 , wherein the uplink channel is an uplink control channel, and the transmission section transmits uplink control information as the signal.
11. The terminal apparatus according to claim 10 , wherein the uplink control information includes an ACK/NACK.
12. The terminal apparatus according to claim 10 , wherein the uplink control information includes at least two among an ACK/NACK, a scheduling request, and a channel state information (CSI).
13. A method for transmitting a signal from a terminal configured with a plurality of downlink component carriers, the method comprising:
receiving downlink control information for each of the plurality of donwlink component carriers; and
transmitting a signal on a frequency resource, the frequency resource including a first frequency resource and a second frequency resource of an uplink channel and being determined from resource information included in the downlink control information, with a frequency hopping between the first frequency resource in a first slot and the second frequency resource in a second slot within a subframe,
wherein a frequency hopping interval between the first frequency resource and the second frequency resource that are determined from the resource information included in the downlink control information for one of the plurality of downlink component carriers is the same as that for another one of the plurality of downlink component carriers.