An Efficient Power Allocation Scheme for Leakage-Based Precoding in Multi-Cell Multiuser MIMO Downlink

To enhance the sum rate of maximizing signal-to-leakage-and-noise ratio (Max-SLNR), a power allocation (PA) scheme that combines the noise and interference whitening, the singular value decomposition, and the water-filling algorithms is proposed for Max-SLNR per user as opposed to the per antenna of users. Simulation shows that the proposed approach produces higher sum rate than the Max-SLNR per antenna scheme and the Max-SLNR per user with equal PA (EPA). It is also better in bit error rate than the Max-SLNR per user with EPA in the presence of shadow fading and receiving antenna correlation.