摘要： 运用相关矩阵法，通过计算2根天线之间的相关系数、多输入多输出(MIMO)的相关矩阵，得到MIMO信道系数矩阵，在其中加入智能天线(SA)的导向向量和赋形向量，得到MIMO/SA矩阵，由此实现对MIMO/SA多天线空时信道的建模。利用Matlab搭建一个仿真平台，从空间、时间、频率3个方面分析MIMO/SA多天线信道模型，结果表明，该模型具有较好的信道方向性增益，信道的空时频特性符合3GPP 25.996的要求，可用于MIMO/SA多天线的设计、优化和信道容量分析。
关键词:
多输入多输出,
智能天线,
空时信道建模,
相关矩阵法,
功率时延分布,
角度功率谱
Abstract: Based on correlation matrix method, Multiple-input and Multiple-output(MIMO) channel coefficient matrix can be obtained by calculating the correlation coefficient between two antennas and MIMO correlation matrix. The steering vector and beam-forming vector of Smart Antenna(SA) are added to the MIMO channel coefficient matrix to form MIMO/SA channel matrix, so that MIMO/SA multi-antenna space-time channel is modeled. A channel simulation platform is established to simulate and analyze MIMO/SA channel in time domain, frequency domain and space domain. Simulation results show that the model has a good channel directivity gain and the channel properties in space, time and frequency meet the demands of 3GPP TR 25.996, and it is useful for designing and optimizing MIMO/SA multi-antenna system and the analysis of channel capacity.
Key words:
Multiple Input and Multiple Output(MIMO),
Smart Antenna(SA),
space-time channel modeling,
correlation matrix method,
Power Delay Profile(PDP),
Power Azimuth Spectrum(PAS)
中图分类号:
吕郡陵, 郭爱煌. MIMO/SA多天线空时信道建模[J]. 计算机工程, 2012, 38(3): 100-103,115.
LV Jun-Ling, GUO Ai-Huang. MIMO/SA Multi-antenna Space-time Channel Modeling[J]. Computer Engineering, 2012, 38(3): 100-103,115.