多天线超宽带信道建模及相关性对其影响

MIMO&UWB Channel Modeling and Impact on Channel Performance from Correlation

该文根据等功率法为多入多出超宽带信道模型配置空间角度,并基于相关矩阵法建立了MIMO&UWB信道模型,推导了多天线情况下空间相关性公式,分析了多天线以及空间参数对信道性能的影响。计算机仿真结果验证了所建模型的有效性,同时表明:空间相关性增大,信道10dB多径数及总能量85%多径数减少,信道平均能量变大,反之,相关性变小,观测到的多径数增多,信道平均能量变小。

In this paper,uniform power subray method is used to allocate space angles for multiple input multiple output ultra-wideband（MIMOUWB） channel model.MIMOUWB channel is modeled based on correlation matrix method and its spatial correlation formula is deduced in the case of multi-antenna.The performance of MIMOUWB channel impacted from multi-antenna and spatial correlation is analyzed.Computer simulation results show that the proposed MIMOUWB channel model is valid,and the number of paths within 10dB of peak power and the number of paths that contain 85% of the total energy become less and the mean energy of channel becomes bigger with the spatial correlation being bigger,otherwise,the number of paths within 10dB of peak power and the number of paths that contain 85% of the total energy become more and the mean energy of channel becomes smaller with the spatial correlation being smaller.