Near Capacity Linear Closed Form Precoders Design With Recursive Stream Selection for MU-MIMO Broadcast Channels
This paper proposes a novel Closed Form (CF) precoders design for Multi-User Multiple Input Multiple Output Broadcast Channel (MU-MIMO BC). The proposed algorithm constructs stream-wisely the precoders in a recursive manner. It consists in two steps: The first step is a recursive selection of the best streams minimizing the interference between users. The selection is based on a null space criteria combined with the eigenvalues for each available stream. In a second step, the precoders are calculated according to the chosen precoding technique with eventually a power distribution optimization.