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US 2012/0057651 A1Published application
Transmission apparatus and method
AssigneeElectronics and Telecommunications Research Institute
InventorDong Kyoo KIM
Life of this patent
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Abstract
A transmission apparatus selects a single transmission channel through which a transmission signal is to be transmitted from among unoccupied available channels, forms the transmission signal so as to alleviate interference with adjacent channels according to occupancy states of an upper adjacent channel and a lower adjacent channel adjacent to the transmission channel, and transmits the transmission signal.
Claims20
A transmission apparatus comprising:
- an available channel search unit determining, as a transmission channel, an available channel upper and lower adjacent channels of which are all unoccupied among one or more available channels which are not occupied by adjacent channels;
- a channel state recognizing unit determining as a transmission channel one of the one or more available channels from occupancy states of the upper adjacent channel and the lower adjacent channel when both the upper adjacent channel and the lower adjacent channel are not unoccupied;
- a transmission waveform determining unit allocating transmission data to at least a portion of subcarriers among entire subcarriers of the transmission channel according to the occupancy states of an upper adjacent channel and a lower adjacent channel of the transmission channel and generating a baseband signal using the subcarriers allocated the transmission data;
- a transmission processing unit processing the baseband signal into a radio frequency signal and transmitting the radio frequency signal.
1 more element
A transmission method for a transmission apparatus, the transmission method comprising:
- selecting a transmission channel from among unoccupied available channels;
- mapping data to at least a portion of subcarrier of the transmission channel according to occupancy states of an upper adjacent channel and a lower adjacent channel adjacent to the transmission channel;
- generating a baseband signal from the subcarrier to which the data is mapped;
- and
- processing the baseband signal and transmitting the signal.
2 more elements
A transmission method for a transmission apparatus, comprising:
- selecting a transmission channel through which a transmission signal is to be transmitted from among unoccupied available channels;
- and
- forming the transmission signal according to occupancy states of an upper adjacent channel and a lower adjacent channel adjacent to the transmission channel.
Dependencies are inferred from the claim text.