摘要
MU-MIMO系统中,基站在相同的时间与频率资源上与多个用户进行通信,导致不同用户之间存在同信道干扰。SLNR预编码方法将联合优化的问题转化成若干个独立优化问题,在系统性能与复杂度之间取到很好的折中。提出了一种改进的SLNR预编码方法,该方法在泄漏信号的基础上,考虑干扰信号的影响,对预编码向量进行迭代优化。仿真结果表明,与SLNR方法相比,该方法在理想CSI和非理想CSI情况下都可以进一步提高系统的吞吐量。
In the multi-user multiple input multiple output （MU-MIMO） system, a base station communicates with multiple users in the same time and spectral resources that results in co-channel interference（CCI） among users. Signal-to-leakage-plusnoise ratio （SLNR） preeoding method transforms a joint optimization problem into several independent ones and makes a satisfying tradeoff between system performance and complexity. In this paper, we propose a modified SLNR precoding scheme that takes the effect of interference signal as well as the leakage signal into consideration, and makes iterative optimization of the precoding vectors. Simulation results show that, compared to SLNR method, the proposed method is able to increase system throughput no matter channel state information （CSI） is perfect or not.
出处
《电信科学》
北大核心
2011年第10期94-97,共4页
Telecommunications Science
基金
国家科技重大专项基金资助项目(No.2011ZX03003-001-01
No.2010ZX03003-001
No.2009ZX03002-003-004)
