摘要
多入多出(MIMO)传输技术是第四代移动通信系统的关键技术之一,而小尺寸间隔下天线阵元间的互耦效应则是有可能影响MIMO系统性能的一个重要因素。文中首先研究分析了一种接近实际电波传输环境的、收发端皆存在散射体的双散射MIMO信道传输模型,然后将天线互耦效应引入此MIMO传输系统;接下来通过建立多天线系统等效互耦效应网络模型,推导了互耦效应影响下空间相关系数和信道容量表达式;最后通过计算机仿真研究了双散射环境下天线阵元互耦对MIMO系统信道容量的影响。仿真实验表明:双散射环境下,互耦效应将降低MIMO系统信道容量。
Multiple input multiple output （MIMO） is one of the key technologies for the fourth generation mobile communication systems, while the mutual coupling （MC） effect among antenna arrays especially under small-size interval is an important factor which may affect the performance of MIMO systems. In this paper we first study a double-scattering MIMO channel transmission model which is more suitable for simulating actual radio transmission environment; Then we introduce MC effect into the double-scattering MIMO transmission systems; Next, based on the establishment of the equivalent coupling model of multi-antenna system, the math expressions of spatial correlation and channel capacity are deduced; Finally, the MC effect on MIMO channel capacity is analyzed numerically in the double-scattering situation through computer simulations. The result of simulations shows that the MC effect will reduce the channel capacity in the double-scattering situation.
出处
《电子设计工程》
2013年第4期162-165,168,共5页
Electronic Design Engineering
基金
中央高校基本科研业务费专项基金资助项目(2011B03414)
国家自然科学基金项目(61001068)
关键词
MIMO
双散射环境
互耦效应
信道容量
空间相关性
MIMO
double-scattering environment
mutual coupling
channel capacity
spatial correlation
