System and method for tuning transmission parameters in multi-user multiple-input-multiple-output systems with aged and noisy channel estimation

A method for tuning transmission parameters based on estimated ratio between a signal to an estimated interference plus noise (SINR) of a user, in a multiple-user multiple-input multiple-output (MU-MIMO) communication system, the method comprising:

• obtaining channel state information (CSI) related to a channel from an access point (AP) to the user, denoted u, and to channels from the AP to other users wherein the user and the other users pertain to the MU-MIMO communication system and participate in a next MU-MIMO transmission;
• calculating transmit beamforming matrix bu based on said CSI;
• obtaining error coefficients related to errors related to channel-ageing and to estimation noise of the CSI;
• and
• calculating the estimated SINR, wherein the estimated MU related interference caused by the signal transmitted to the other users by the AP and affecting the signal received by said user includes a combination of up to three components, each multiplied by a respective dedicated error coefficient, the first component is the power allocated to the other users multiplied by the energy of the channel to the user, the second component is the power allocated to the other users, and the third component is the power allocated to the other users multiplied by the magnitude of the channel to the user.

A data processing system comprising:

• a processor;
• and
• a non-transitory computer usable medium connected to the processor, wherein the computer usable medium contains a set of instructions for calculating a tuning transmission parameters based on estimated ratio between a signal to an estimated interference plus noise (SINR) of a user in a multiple-user multiple-input multiple-output (MU-MIMO) communication system, the MU-MIMO communication system comprises an access point (AP), the user and other users, wherein the processor is designed to carry out a set of instructions to perform a method of:
• obtaining channel state information (CSI) related to a channel from the AP to the user, denoted u, and to channels from the AP to the other users, the CSI relates to estimated channel magnitudes;
• obtaining error coefficients related to errors related to channel-ageing and to estimation noise of the CSI;
• and
• calculating the estimated SINR, wherein the estimated interference caused by the signal transmitted to the other users by the AP and affecting the signal received by said user is related to power of the other users and to the estimated channel magnitude, and to the error coefficients,
• wherein the processor is designed to carry out a set of instructions to further perform a method of:
• selecting the transmission parameters based on the estimated SINR;
• and
• transmitting data to the user using the selected transmission parameters.