Multi User MIMO System with Block Diagonalization Precoding

摘要

In multi-user MIMO, the capacity achieving techniques are precoding strategies usually accomplish affordable overall performance with much lower intricacy. Linear precoding strategies include zero-forcing (ZF) precoding customized for low-rate feedback of channel state information (CSI). Non-linear precoding is designed essentially dependent on the concept of dirty paper coding (DPC), which indicates that any recognized interference on the transmitter might be subtracted without the chastisement of radio resources if a definitive precoding scheme can be carried out on the transmit signal. The block diagonalization (BD) is a linear precoding approach for multi-user multi-input multi-output (MU-MIMO) broadcast channels, that's capable of completely get rid of the multi-user interference (MUI), but it isn't computationally efficient. This paper proposes the block diagonalization approach in order to achieve the MIMO broadcast channel capacity. The intricacy analysis recommends that the proposed approach is more efficient than the other precoding techniques in terms of the quantity of required computations.