Patent ID: 8750358

Claim:
A method for improving multiple-input multiple-output (MIMO) downlink transmissions, the method comprising: obtaining a channel state information (CSI) report including preferred matrix index (PMI) for precoding, channel quality index (CQI) and rank index (RI) at a base station from user terminals through a channel feedback; applying selectively a signal-to-interference-plus-noise-ratio (SINR) offset to an SINR of said CSI report; applying selectively a rate matching responsive to said SINR offset or said CSI report; controlling or adjusting said SINR offset; and applying an SINR scaling approximation for computing an SINR when exact precoders for co-scheduled streams are decided or evaluated during a scheduling including multiuser (MU) MIMO pairing and resource allocation, responsive selectively to said CSI report or a second said SINR offset.