MIMO Beam Steering via Precoder Matrix and Antenna Spacing

The patent segments the MIMO system by treating receivers in different geographic locations as separate entities, each with its own antenna array. This allows the system to exploit spatial dimensions across multiple receivers rather than requiring each individual receiver to have multiple antennas, thereby reducing per-device complexity while maintaining system capacity.

The patent transitions from exploiting spatial dimensions at the receiver end (which is limited by device form factor) to exploiting spatial dimensions across multiple geographically separated receivers. This dimensional shift allows the system to achieve high spectral efficiency without increasing receiver complexity.

The patent applies local quality by forming directed beams towards specific receiver locations using precoding. This allows the system to concentrate signal energy in the direction of the intended receiver while suppressing signal in other directions, thereby reducing co-channel interference to other users experiencing frequency reuse.

The patent converts the harmful effect of co-channel interference into a beneficial directionality effect by using beamforming. The interference that would normally be omnidirectional is transformed into a directed beam that only affects the intended receiver, allowing frequency reuse to proceed with minimal interference.