Method and apparatus for transmitting/receiving data in a multiple-input multiple-output communication system

1. A method for transmitting and receiving data in a multiple-input multiple-output (MIMO) communication system including a transmission apparatus having a plurality of transmission antennas for communicating with a reception apparatus having a plurality of reception antennas, the method comprising:

receiving, by the transmission apparatus from the reception apparatus, singular value decomposition (SVD)-decomposed channel information for a channel established between the transmission apparatus and the reception apparatus;

performing, by the transmission apparatus, QR decomposition on the received SVD-decomposed channel information;

setting, by the transmission apparatus, multiple transmission antennas from among the plurality of transmission antennas, to be allocated to the channel, according to a result of the QR decomposition; and

transmitting, by the transmission apparatus, data using the set multiple transmission antennas,

wherein the SVD-decomposed channel information is from an effective multiple-input single-output (MISO) channel matrix F k , which is transformed by a MIMO channel matrix H k for the reception apparatus.

2. The method of claim 1 , further comprising:

performing, by the reception apparatus, SVD on the H k for multiple reception antennas from among the plurality of reception antennas;

decomposing, by the reception apparatus, the H k into the F k for a single reception antenna from among the plurality of reception antennas, using a matrix for transforming the H k into the F k ; and

feeding back, by the reception apparatus, the F k to the transmission apparatus.

3. The method of claim 2 , further comprising:

receiving, by the transmission apparatus, the F k ; and

performing the QR decomposition on the received F k .

4. The method of claim 1 , wherein the F k is expressed by:

F k =U k H k ,

wherein U k H denotes a matrix for transforming the H k for a single user into the F k for a multiuser.

5. A method for transmitting and receiving data in a multiple-input multiple-output (MIMO) communication system including a reception apparatus having a plurality of reception antennas for communicating with a transmission apparatus having a plurality of transmission antennas, the method comprising:

transforming, by the reception apparatus, a MIMO channel matrix H k into an effective multiple-input single-output (MISO) channel matrix F k by performing singular value decomposition (SVD) on the H k ; and

feeding hack, by the reception apparatus, SVD-decomposed channel information of the F k to the transmission apparatus.

6. The method of claim 5 , wherein performing SVD on the H k comprises:

performing, by the reception apparatus, the SVD on the H k for multiple reception antennas from among the plurality of reception antennas; and

decomposing, by the reception apparatus, the H k into the F k for a single reception antenna from among the plurality of reception antennas using a matrix for transforming the H k into the F k .

7. A multiple-input multiple-output (MIMO) communication system comprising a transmission apparatus including a plurality of transmission antennas for communicating with a reception apparatus including a plurality of reception antennas,

wherein the transmission apparatus receives from the reception apparatus singular value decomposition (SVD)-decomposed channel information for a channel established between the transmission apparatus and the reception apparatus, performs QR decomposition on the received SVD-decomposed channel information, sets multiple transmission antennas, from among the plurality of transmission antennas, to be allocated to the channel, according to a result of the QR decomposition, and transmits data using the set multiple transmission antennas, and

wherein the SVD-decomposed channel information is from an effective multiple-input single-output (MISO) channel matrix F k , that is transformed by a MIMO channel matrix H k for the reception apparatus.

8. The MIMO communication system of claim 7 , wherein the F k is expressed by:

F k =U k H H k ,

wherein U k H denotes a matrix for transforming the H k for a single user into the F k for a multiuser.

9. The MIMO communication system of claim 7 , wherein the reception apparatus performs SVD on the H k for multiple reception antennas from among the plurality of reception antennas, decomposes the H k into the F k for a single reception antenna, from among the plurality of reception antennas, using a matrix for transforming the H k into the F k , and feeds back the F k to the transmission apparatus.

10. The MIMO communication system of claim 9 , wherein the transmission apparatus receives the F k , and performs the QR decomposition on the received F k .

11. A multiple-input multiple-output (MIMO) communication system comprising a reception apparatus including a plurality of reception antennas for communicating with a transmission apparatus including a plurality of transmission antennas,

wherein the reception apparatus transforms a MIMO channel matrix H k into an effective multiple-input single-output (MISO) channel matrix F k by performing singular value decomposition (SVD) on the H k , and feeds back SVD-decomposed channel information of the F k to the transmission apparatus.

12. The MIMO communication system of claim 11 , wherein the reception apparatus performs SVD on the H k for multiple reception antennas from among the plurality of reception antennas, and decomposes the H k into the F k for a single reception antenna, from among the plurality of reception antennas, using a matrix for transforming the H k into the F k .