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US 2010/0246702 A1Published application
Radio transmitting apparatus, radio receiving apparatus and method therefor
AssigneePanasonic Corporation
InventorKenichi Miyoshi
Life of this patent
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Abstract
By assigning a plurality of subcarriers 31 to a data channel 33 and assigning fewer subcarriers 32 than the plurality of subcarriers 31 to a control channel 34 and, in addition, locating the control channel 34 at the center frequency fc of a frequency band used to transmit the data channel 33, on the radio receiving apparatus side, the frequencies of a local signal by which the received signal is multiplied share the same value, thereby speeding up the switching between the control channel and the data channel.
Claims28
A radio receiving apparatus comprising:
- (a) a receiver configured to receive an OFDM multicarrier signal mapped to a first plurality of subcarriers corresponding to a first band and a second plurality of subcarriers corresponding to a second band, the first plurality of subcarriers assignable to a data channel, the second plurality of subcarriers assignable to a control channel, and a center frequency of the second band being identical to a center frequency of a whole band comprising the first band and the second band;
- and
- (b) a down-conversion section configured to down-convert the received OFDM multicarrier signal.
A radio receiving method comprising:
- (a) receiving an OFDM multicarrier signal mapped to a first plurality of subcarriers corresponding to a first band and a second plurality of subcarriers corresponding to a second band, the first plurality of subcarriers assignable to a data channel, the second plurality of subcarriers assignable to a control channel, and a center frequency of the second band being identical to a center frequency of a whole band comprising the first band and the second band;
- and
- (b) down-converting the received OFDM multicarrier signal.
A radio transmitting apparatus comprising:
- (a) an assigning section configured to assign a first plurality of subcarriers of an OFDM multicarrier signal to a data channel, and to assign a second plurality of subcarriers of the OFDM multicarrier signal to a control channel,
- the first plurality of subcarriers being located in two separate parts on a frequency axis, the second plurality of subcarriers being located between the two separate parts, and
- a center frequency of the first plurality of subcarriers being the same as a center frequency of the second plurality of subcarriers;
- (b) an up-conversion section configured to up-convert the OFDM multicarrier signal;
- and
- (c) a transmitter operable to transmit the up-converted OFDM multicarrier signal.
3 more elements
A radio transmitting method comprising:
- (a) assigning a first plurality of subcarriers of an OFDM multicarrier signal to a data channel, and to assign a second plurality of subcarriers of the OFDM multicarrier signal to a control channel,
- the first plurality of subcarriers being located in two separate parts on a frequency axis, the second plurality of subcarriers being located between the two separate parts, and
- a center frequency of the first plurality of subcarriers being the same as a center frequency of the second plurality of subcarriers;
- (b) up-converting the OFDM multicarrier signal;
- and
- (c) transmitting the up-converted OFDM multicarrier signal.
3 more elements
A radio transmitting apparatus comprising:
- (a) a mapping section configured to map an OFDM multicarrier signal to a first plurality of sub carriers corresponding to a first band and to a second plurality of subcarriers corresponding to a second band, the first plurality of subcarriers assignable to a data channel, the second plurality of subcarriers assignable to a control channel, and a center frequency of the second band being identical to a center frequency of a whole band comprising the first band and the second band;
- (b) an up-conversion section configured to up-convert the OFDM multicarrier signal;
- and
- (c) a transmitting section configured to transmit the up-converted OFDM multicarrier signal.
1 more element
A radio transmitting method comprising:
- (a) mapping an OFDM multicarrier signal to a first plurality of subcarriers corresponding to a first band and to a second plurality of subcarriers corresponding to a second band, the first plurality of subcarriers assignable to a data channel, the second plurality of subcarriers assignable to a control channel, and a center frequency of the second band being identical to a center frequency of a whole band comprising the first band and the second band;
- (b) up-converting the OFDM multicarrier signal;
- and
- (c) transmitting the up-converted OFDM multicarrier signal.
1 more element
Dependencies are inferred from the claim text.