Detection Algorithm Based on an Enhanced Null-Space Constraint for Multi-User MIMO Systems
Yafeng Wang · Beijing Youdian Xueyuan xuebao · 2005
A Transmit Preprocessing Technique for Downlink Spatial Multiplexing in Multi-user MIMO Channels was proposed.Through adding additional constraint to the joint Tx-Rx MMSE optimization scheme the equivalent channel could be changed from block-diagonalization to complete diagonalization.MUI(multi-user interference) and per-user multi-stream interference could be canceled simultaneously.The modified algorithm is much more feasible and has the advantage of simplifying the receivers.A general complete diagonalization is the channel inversion algorithm.Performance analysis and comparison prove the complete diagonalization algorithm proposed has better performance than channel inversion algorithm.