Multiple input multiple output (MIMO) communication system for feedforwarding interference vector indicator

A communication method of a terminal for a target user in a MIMO communication system which uses a precoding matrix generated from vectors included in a codebook, the communication method comprising:

• determining a target precoding vector for the target user from among precoding vectors included in the precoding matrix, based on a precoding vector indicator received from a base station;
• configuring a mapping table based on the target precoding vector, the mapping table comprising a mapping between interference vector indicators and a plurality of vectors that are included in the codebook, wherein the plurality of vectors are mapped to the interference indicator based on a probability that the plurality of vectors are included in the precoding matrix;
• and
• determining remaining precoding vectors included in the precoding matrix by analyzing an interference vector indicator received from the base station using the mapping table.

A base station for a MIMO communication system which uses a precoding matrix generated from vectors included in a codebook, the base station comprising:

• a mapping table configuring module to configure a mapping table based on a target precoding vector from among vectors included in the precoding matrix, the mapping in table comprising a mapping between interference vector indicators and a plurality of vectors that are included in the codebook, based on a probability that the plurality of vectors are included in the precoding matrix;
• an indicator generating module to generate a precoding vector indicator indicating the target precoding vector, and to generate an interference vector indicator using the mapping table;
• and
• an indicator providing module to provide the precoding vector indicator and the interference vector indicator to a target user.

A terminal for a target user in a MIMO communication system which uses a precoding matrix generated from vectors included in a codebook, the terminal comprising:

• an indicator receiving module to receive a precoding vector indicator and an interference vector indicator from a base station, and to determine a target precoding vector for the target user based on the precoding vector indicator;
• a mapping table configuring module to configure a mapping table based on the target precoding vector, the mapping table comprising a mapping between interference vector indicators and a plurality of vectors included in the codebook, based on a probability that the plurality of vectors are included in the precoding matrix;
• and
• a vector recognizing module to determine remaining precoding vectors included in the precoding matrix by analyzing the interference vector indicator using the mapping table.