A method of operating a communication node according to some embodiments includes generating (400) a link adaptation for a downlink transmission to a plurality of UEs based on first channel state information, generating (402) estimated SINR values for the UEs based on the link adaptation, obtaining (404) new channel state information for the UEs, generating (406) updated estimated SINR value based on the new channel state information and the link adaptation, modifying (408) a power allocation for the UEs based on the updated estimated SINR, and transmitting (410) data to the UEs using the link adaptation and the modified power allocation.