Compact feedback for closed loop MIMO

A wireless communication device comprising:

• a channel matrix determination unit to determine a channel matrix H for a MIMO channel using data received from a remote wireless entity by multiple receive antennas;
• a matrix decomposition unit to generate a beam forming matrix V using said channel matrix H;
• a parameter extraction unit to extract parameters from said beam forming matrix V that describe said beam forming matrix V in a compact form and allow said beam forming matrix V to be reconstructed from said parameters;
• and
• a transmitter to transmit said extracted parameters to said remote wireless entity as feedback.

A method comprising:

• receiving a compact representation of a beam forming matrix from a remote wireless entity;
• reconstructing said beam forming matrix using said compact representation;
• and
• using said reconstructed beam forming matrix to process data symbols to be transmitted to the remote wireless entity via multiple transmit antennas.

A method comprising:

• determining a channel matrix for a wireless MIMO channel;
• determining a beam forming matrix, to be used by a remote wireless entity, using said channel matrix;
• extracting parameters from said beam forming matrix that describe said beam forming matrix in a compact form and that allow said beam forming matrix to be reconstructed;
• and
• delivering said extracted parameters to said remote wireless entity as feedback information.

An article comprising a storage medium having instructions stored thereon that, when executed by a computing platform, operate to:

• receive a compact representation of a beam forming matrix from a remote wireless entity;
• reconstruct said beam forming matrix using said compact representation;
• and
• use said reconstructed beam forming matrix to process data symbols to be transmitted to the remote wireless entity via multiple transmit antennas.

A wireless communication device comprising:

• multiple dipole transmit antennas;
• a matrix multiplier to multiply a data symbol vector by a beam forming matrix before said data symbol vector is transmitted to a remote wireless entity via said multiple dipole transmit antennas;
• a receiver to receive feedback information from the remote wireless entity, said feedback information describing, in a compact form, a specific beam forming matrix to be used in a future data transmission to said remote wireless entity;
• and
• a matrix reconstruction unit to reconstruct said specific beam forming matrix using said feedback information, said reconstructed beam forming matrix for delivery to said matrix multiplier.