Apparatus for generating precoding codebook for mimo system and method using the apparatus

A method of generating a preceding codebook, the method comprising:

• collecting a predetermined number of spatial beams into each of a plurality of clusters such that mutual interference is minimized, the predetermined number of spatial beams selected from among a plurality of spatial beams distributed to at least one user during a preceding process of a Multiple-input Multiple-Output (MIMO) communication scheme;
• generating a mapping table including a plurality of elements and one or more indexes generated based on information about the plurality of clusters, wherein a value of each element of the mapping table is based on interference between the plurality of clusters and/or whether overlapping of the plurality of clusters is allowed;
• selecting at least one cluster from the mapping table based on the value of each element of the mapping table;
• and
• generating a codebook from the selected at least one cluster.

A system for generating and transmitting a precoding codebook, the system comprising:

• a base station to generate the preceding codebook, the base station comprising:
• a clustering unit to collect a predetermined number of spatial beams into one cluster such that mutual interference is minimized, the predetermined number of spatial beams selected from among a plurality of spatial beams distributed to at least one user during a preceding process of a Multiple-Input Multiple-Output (MIMO) communication scheme,
• a mapping table generator to generate a mapping table including a plurality of elements and one or more indexes generated based on information about a plurality of clusters of the clustering unit, wherein a value of each element of the mapping table is based on interference between the plurality of clusters and/or whether overlapping of the plurality of clusters is allowed, and
• a transmitter to select a transmitting cluster based on the mapping table and communication environment-based preferred cluster information, and to transmit data from via the transmitting cluster;
• and
• a terminal to download the preceding codebook from the base station, to receive the transmitted data from the base station via the transmitting cluster, and to transmit the communication environment-based preferred cluster information to the base station,
• wherein the transmitter selects the transmitting cluster to minimize interference with a neighboring terminal of the terminal.

A method of generating and transmitting a preceding codebook, the method comprising:

• collecting a predetermined number of spatial beams into each of a plurality of clusters such that mutual interference is minimized, the predetermined number of spatial beams selected from among a plurality of spatial beams distributed to at least one user during a preceding process of a Multiple-Input Multiple-Output (MIMO) communication scheme;
• generating a mapping table including a plurality of elements and one or more indexes generated based on information about the plurality of clusters, wherein a value of each element of the mapping table is based on interference between the plurality of clusters and/or whether overlapping of the plurality of clusters is allowed;
• selecting a transmitting cluster based on the mapping table and communication environment-based preferred cluster information that is received from a terminal such that interference with a neighboring terminal is minimized;
• and
• transmitting data from a base station via the transmitting cluster.