下行多用户MIMO中基于SLNR的迭代用户功率分配

Leakage-based precoding with iterative power allocation in multi-user MIMO downlink

在下行多用户多输入多输出(MU-MIMO)场景下,考虑最大化信号泄漏噪声比(Max-SLNR)预编码,提出一种通过迭代方法进行用户间功率分配的算法.通过与已有用户功率分配算法的比较,该算法进一步提高了系统吞吐量.仿真结果表明,本算法可以通过减少迭代次数降低算法复杂度,而几乎不损失系统性能.

To enhance the sum rate of maximizing signal-to-leakage-and-noise ratio（Max-SLNR） in the downlink multi-user multiple-input multiple-output（MU-MIMO） system,we propose an iterative power allocation scheme.Compared with conventional power allocation schemes,the proposed scheme achieves higher system throughput.Numerical results show that the complexity of the scheme is reduced by decreasing the number of iteration without losing system throughput.