匹配加权信号泄漏噪声比多用户预编码迭代算法

Multiuser iterative precoding algorithm based on the matching weighted signal-to-leakage-and-noise ratio

为了降低多天线蜂窝通信系统中存在的用户间干扰,提出了基于匹配加权信号泄漏噪声比的多用户预编码迭代优化算法.该算法把各个用户的有效信道增益作为匹配加权因子,首先对各个用户接收到的泄漏信号功率进行匹配加权,然后通过最大化匹配加权信号泄漏噪声比准则求出预编码矢量的闭式解,最后采用迭代算法进行了优化.仿真结果表明,该算法能够提高系统和容量,同时保持较低的实现复杂度.

A multiuser iterative precoding algorithm is proposed to reduce the multiuser interference in multiple antenna cellular communication systems. The proposed algorithm is based on the matching weighted signal-to- leakage-and-noise ratio. In the proposed algorithm, the effective channel gain of each user is selected as the matching weighted factor, and the leakage power received by each user is weighted by the factor. An exact closed form solution for the precoding vector is obtained by maximizing the matching weighted signal-to-leakage-and-noise ratio, and then optimized by using an iterative optimization approach. Simulation results show that the proposed iterative algorithm based on the matching weighted signal-to-leakage-and-noise ratio can improve the sum capacity of the system, and retain low computational complexity.