Wireless communication system, wireless communication apparatus, and wireless communication method
A wireless communication system is disclosed. The wireless communication system performs data transmission using spatially multiplexed streams from a first terminal including N antennas to a second terminal including M antennas (N and M are integers larger than or equal to 2 and N>M).
1. A receiving device for wireless communication, the receiving device comprising:
processing circuitry configured to:
receive maximum dimension information indicating a maximum number of rows of a channel state information feedback matrix, the maximum dimension information being included in a beamforming capability field defined in wireless network standard IEEE 802.11;
provide, to a transmitting device, a feedback matrix generated according to information included in the beamforming capability field; and
receive a data packet according to explicit feedback beamforming with a transmission weight matrix generated based at least in part on the feedback matrix.
2. The receiving device of claim 1 , wherein the beamforming capability field is included in a HT capabilities element defined in wireless network standard IEEE 802.11.
3. The receiving device of claim 2 , wherein the HT capabilities element is present in a management frame.
4. The receiving device of claim 3 , wherein the management frame includes:
a beacon signal, a measure pilot, an association response, a re-association response, and/or a probe response.
5. The receiving device of claim 1 , wherein the maximum dimension information is represented by two bits, the two bits being located adjacent to a bit field including maximum beamformer capability information.
6. The receiving device of claim 1 , wherein the beamforming capability field further includes both implicit beamforming capability information and explicit beamforming capability information.
7. The receiving device of claim 1 , wherein a number of rows of the feedback matrix is equal to or less than a maximum number of rows indicated by the maximum dimension information.
8. The receiving device of claim 1 , further comprising:
a plurality of antennas configured to transmit or receive signals including a channel estimation capability.
9. The receiving device of claim 8 , wherein a number of the plurality of antennas is two or three.
10. The receiving device of claim 9 , wherein a number of the rows of the channel state information feedback matrix is equal to a number of the plurality of antennas.
11. The receiving device of claim 8 , further comprising:
a plurality of digital filters configured to perform band limitation, a number of the plurality of digital filters being equal to a number of the plurality of antennas.
12. A mobile receiving apparatus for wireless communication, the mobile receiving apparatus comprising:
a plurality of antennas; and
processing circuitry configured to:
receive maximum dimension information indicating a maximum number of rows of a channel state information feedback matrix, the maximum dimension information being included in a beamforming capability field defined in wireless network standard IEEE 802.11;
provide, to a transmitting device, a feedback matrix generated according to information included in the beamforming capability field; and
receive a data packet according to explicit feedback beamforming with a transmission weight matrix generated based at least in part on the feedback matrix.
13. The mobile receiving apparatus of claim 12 , wherein the mobile receiving apparatus is a mobile telephone.
14. The mobile receiving apparatus of claim 12 , wherein the number of the plurality of antennas is two.
15. The mobile receiving apparatus of claim 12 , wherein the number of the plurality of antennas is three.
16. A receiving method for wireless communication, the receiving method comprising:
receiving maximum dimension information indicating a maximum number of rows of a channel state information feedback matrix, the maximum dimension information being included in a beamforming capability field defined in wireless network standard IEEE 802.11;
providing, to a transmitting device, a feedback matrix generated according to information included in the beamforming capability field; and
receiving a data packet according to explicit feedback beamforming with a transmission weight matrix generated based at least in part on the feedback matrix.
17. The receiving method of claim 16 , wherein the beamforming capability field is included in a HT capabilities element defined in wireless network standard IEEE 802.11.
18. The receiving method of claim 17 , wherein the HT capabilities element is present in a management frame.
19. The receiving method of claim 18 , wherein the management frame includes:
a beacon signal, a measure pilot, an association response, a re-association response, and/or a probe response.
20. The receiving method of claim 16 , wherein the maximum dimension information is represented by two bits, the two bits being located adjacent to a bit field including maximum beamformer capability information.
21. The receiving method of claim 16 , wherein the beamforming capability field further includes both implicit beamforming capability information and explicit beamforming capability information.
22. The receiving method of claim 16 , wherein a number of rows of the feedback matrix is equal to or less than a maximum number of rows indicated by the maximum dimension information.