天线极化对非视距MIMO系统性能的影响.PDF

计算机技术与教育学报 第 2 卷 第1期 2013 年7月 Journal of Computer Technology and Education Vol.2 No.1 July 2013 55 天线极化对非视距MIMO系统性能的影响 黄 蓉 徐立勤 南京邮电大学电子科学与工程学院 南京,210003 摘 要 本文对极化 MIMO 系统的空间相关性和容量进行了研究。侧重考虑了天线配置和传播环境因素，建立极化三 维几何随机信道模型。并基于2 ×2 天线系统，研究 MIMO 系统采用极化天线对空间相关性的影响以及散射物去极化对 系统性能的影响。仿真结果表明，使用双极化天线能够降低空间相关性。 关键字 多输入多输出，空间相关，信道容量，天线极化 The Effect of Antenna Polarization on NLOS Propagation of MIMO systems HUANG Rong XU Liqin Nanjing University of Posts and Telecommunication Nanjing 210003,China Abstract—In this paper, we mainly investigate polarization MIMO system spatial correlation and capacity. We focus considering factors of the antenna configuration and the propagation environment, the polarized three-dimensional geometric random channel model is established. With two transmit antennas and two receive antennas, we do research about the effect by polarization antenna using in MIMO system on spatial correlation. The effect of the scattering material depolarization on system performance is also considered. Simulation results show that the use of dual-polarized antenna can reduce the spatial correlation. Key words—MIMO, spatial correlation, channel capacity, antenna polarization 1 引 言 2 信道模型 天线多极化已成为一种改善系统性能的有效方 文献中已提出基于几何的随机信道模型（GSC