Efficient synthesis and analysis of OFDM and MIMO-OFDM signals

A method for provisioning antennas of an antenna array in a radio access network (RAN), comprising:

• configuring a baseband unit to communicate with the antenna array via a fronthaul network;
• and
• configuring the baseband unit to:
• for a first set of antennas in the antenna array, generate a first Multiple Input Multiple Output (MIMO) matrix from channel state information (CSI);
• compute a sparse update matrix corresponding to an update to the first set of antennas;
• sum the sparse update matrix with the first MIMO matrix to produce a second MIMO matrix corresponding to a second set of antennas in the antenna array, the second set of antennas being different from the first set of antennas;
• make a determination of which of the first MIMO matrix and the second MIMO matrix results in a better CSI, MIMO condition number, peak-to-average-power ratio, or quality metric of spatial subchannels;
• and
• based on the determination, configure the first set of antennas or the second set of antennas to transmit or receive signals in the RAN.

A non-transitory computer-readable medium storing instructions that, when executed by one or more processors, cause the one or more processors to:

• for a first set of antennas in an antenna array, generate a first Multiple Input Multiple Output (MIMO) matrix from channel state information (CSI);
• compute a sparse update matrix corresponding to an update to the first set of antennas;
• sum the sparse update matrix with the first MIMO matrix to produce a second MIMO matrix corresponding to a second set of antennas in the antenna array, the second set of antennas being different from the first set of antennas;
• make a determination of which of the first MIMO matrix and the second MIMO matrix results in a better CSI, MIMO condition number, peak-to-average-power ratio, or quality metric of spatial subchannels;
• and
• based on the determination, configure the first set of antennas or the second set of antennas to transmit or receive signals in a radio access network (RAN).