Method and system for communication channel optimization in a multiple-input multiple-output (mimo) communication system

A transmitter for a multiple-input multiple-output (MIMO) communication system, the transmitter comprising,

• a control module for receiving feedback data representing channel state information from respective receivers of the MIMO communication system;
• a scheduler unit for grouping the receivers into one or more groups based on the received feedback data, said scheduler unit being capable of obtaining a precoding matrix for each group of receivers based on the received feedback data such that precoding vectors or sub-matrices in the precoding matrix associated with respective receivers of said each group of receivers are orthogonal to each other;
• and
• a precoding module for applying the precoding matrix to input signals for transmission to said each group of receivers.

A multiple-input multiple-output (MIMO) communication system, the MIMO communication system comprising,

• at least one transmitter;
• one or more receivers deriving feedback data from signals received from the at least one transmitter and transmitting the feedback data to the at least one transmitters;
• wherein each transmitter comprises,
• a control module for receiving the feedback data representing channel state information from respective receivers of the MIMO communication system;
• a scheduler unit for grouping the receivers into one or more groups based on the received feedback data, said scheduler unit being capable of obtaining a precoding matrix for each group of receivers based on the received feedback data such that precoding vectors or sub-matrices in the precoding matrix associated with respective receivers of said each group of receivers are orthogonal to each other;
• and
• a precoding module for applying the precoding matrix to input signals for transmission to said each group of receivers.