Radio communication apparatus and radio communication method
View Patent ↗A radio communication apparatus and an associated method are provided. The apparatus includes a receiving unit configured to receive first data and second data, which are transmitted from a plurality of antennas for spatial-multiplexing using a plurality of blocks, into which a plurality of consecutive subcarriers in a frequency domain are divided. The apparatus further includes a calculating unit configured to calculate a first absolute CQI value per each of the blocks for the first data and a second absolute CQI value per each of the blocks for the second data, and calculate a relative value of the second absolute CQI value with respect to the first absolute CQI value, per each of the blocks. The apparatus still further includes a transmitting unit configured to transmit the first absolute CQI value and the relative value of the second absolute CQI value in the same block.
1. A radio communication apparatus comprising:
a transmitting unit configured to transmit, to a receiving apparatus, first data and second data from a plurality of antennas for spatial-multiplexing using a plurality of blocks, into which a plurality of consecutive subcarriers in a frequency domain are divided; and
a receiving unit configured to receive a first absolute channel quality indicator (CQI) value and a relative CQI value which are transmitted from the receiving apparatus,
wherein, at the receiving apparatus, the first absolute CQI value is calculated per each of the blocks for the first data, a second absolute CQI value is calculated per each of the blocks for the second data, and the relative CQI value of the second absolute CQI value is calculated with respect to the first absolute CQI value, per each of the blocks, from the first absolute CQI value and the second absolute CQI value in the same block, and
wherein, at the receiving apparatus, the relative CQI value of the second absolute CQI value in the first block of the plurality of blocks for the second data is calculated with respect to the first absolute CQI value in the first block of the plurality of blocks for the first data, and the relative CQI value of the second absolute CQI value in the second block of the plurality of blocks for the second data is calculated with respect to the first absolute CQI value in the second block of the plurality of blocks for the first data.
2. The radio communication apparatus according to claim 1 , wherein, at the receiving apparatus, the relative CQI value of the second absolute CQI value in one of the plurality of blocks for the second data is calculated with respect to the first absolute CQI value in the same one of the plurality of blocks for the first data.
3. The radio communication apparatus according to claim 1 , wherein said receiving unit receives feedback information comprising the first absolute CQI value and the relative CQI value of the second absolute CQI value.
4. The radio communication apparatus according to claim 1 , wherein said transmitting unit performs a frequency scheduling in response to the received first absolute CQI value and the received relative CQI value of the second absolute CQI value.
5. The radio communication apparatus according to claim 1 , further comprising a modulating unit configured to modulate the first data and the second data, wherein said transmitting unit transmits the modulated first data and the modulated second data.
6. The radio communication apparatus according to claim 5 , wherein said modulating unit modulates the first data and the second data per each one of the data.
7. The radio communication apparatus according to claim 5 , wherein said modulating unit modulates the first data and the second data in response to the received first absolute CQI value and the received relative CQI value of the second absolute CQI value.
8. The radio communication apparatus according to claim 1 , wherein the absolute CQI value indicates a code rate or a modulation scheme.
9. A radio communication apparatus comprising:
a modulating unit configured to modulate first data and second data per each one of the data,
a transmitting unit configured to transmit, to a receiving apparatus, the modulated first data and the modulated second data from a plurality of antennas for spatial-multiplexing using a plurality of blocks, into which a plurality of consecutive subcarriers in a frequency domain are divided; and
a receiving unit configured to receive a first absolute channel quality indicator (CQI) value and a relative CQI value which are transmitted from the receiving apparatus,
wherein, at the receiving apparatus, the first absolute CQI value is calculated per each of the blocks for the first data, a second absolute CQI value is calculated per each of the blocks for the second data, the relative CQI value of the second absolute CQI value is calculated with respect to the first absolute CQI value, per each of the blocks, from the first absolute CQI value and the second absolute CQI value, and the relative CQI value of the second absolute CQI value in one of the plurality of blocks for the second data is calculated with respect to the first absolute CQI value in the same one of the plurality of blocks for the first data, and
wherein, at the receiving apparatus, the relative CQI value of the second absolute CQI value in the first block of the plurality of blocks for the second data is calculated with respect to the first absolute CQI value in the first block of the plurality of blocks for the first data, and the relative CQI value of the second absolute CQI value in the second block of the plurality of blocks for the second data is calculated with respect to the first absolute CQI value in the second block of the plurality of blocks for the first data.
10. A radio communication method comprising:
transmitting, to a receiving apparatus, first data and second data from a plurality of antennas for spatial-multiplexing using a plurality of blocks, into which a plurality of consecutive subcarriers in a frequency domain are divided; and
receiving a first absolute channel quality indicator (CQI) value and a relative CQI value which are transmitted from the receiving apparatus,
wherein, at the receiving apparatus, the first absolute CQI value is calculated per each of the blocks for the first data, a second absolute CQI value is calculated per each of the blocks for the second data, and the relative CQI value of the second absolute CQI value is calculated with respect to the first absolute CQI value, per each of the blocks, from the first absolute CQI value and the second absolute CQI value in the same block, and
wherein, at the receiving apparatus, the relative CQI value of the second absolute CQI value in the first block of the plurality of blocks for the second data is calculated with respect to the first absolute CQI value in the first block of the plurality of blocks for the first data, and the relative CQI value of the second absolute CQI value in the second block of the plurality of blocks for the second data is calculated with respect to the first absolute CQI value in the second block of the plurality of blocks for the first data.
11. The radio communication method according to claim 10 , wherein, at the receiving apparatus, the relative CQI value of the second absolute CQI value in one of the plurality of blocks for the second data is calculated with respect to the first absolute CQI value in the same one of the plurality of blocks for the first data.
12. The radio communication method according to claim 10 , wherein the first absolute CQI value and the relative CQI value of the second absolute CQI value are received as feedback information.
13. The radio communication method according to claim 10 , further comprising performing a frequency scheduling in response to the received first absolute CQI value and the received relative CQI value of the second absolute CQI value.
14. The radio communication method according to claim 10 , further comprising modulating the first data and the second data, wherein the modulated first data and the modulated second data are transmitted.
15. The radio communication method according to claim 14 , wherein the first data and the second data are modulated per each one of the data.
16. The radio communication method according to claim 14 , wherein the first data and the second data are modulated in response to the received first absolute CQI value and the received relative CQI value of the second absolute CQI value.
17. The radio communication method according to claim 10 , wherein the absolute CQI value indicates a code rate or a modulation scheme.