基于射线跟踪的MIMO信道容量分析

随着无线通信的发展,MIMO已经成为无线通信领域中的研究热点,场强和信道容量的分布预测是通信系统进行网络规划、管理和维护通信网的基础,对无线网络的优化有着十分重要的意义.选用确定性模型射线跟踪模型,采用镜像法来建立室内MIMO信道模型,并使用MATLAB软件对所建立的模型进行仿真.首先建立特定的室内场景,对其路径损耗进行预测,并与实际测量值进行对比,验证了该模型的正确性及有效性;然后,在理论上对MIMO容量进行分析;最后,仿真分析信噪比(SNR)以及天线数目对MIMO信道容量的影响.

Channel capacity analysis for MIMO system based on ray tracing

With the development of wireless communication, MIMO has become a hot research in the field of wireless communication. The prediction of the distribution of field and the channel capacity is the basic of communication system network planning and management which has important significance of the wireless network optimization. In this paper, we select the ray tracing model and the mirror image method to establish indoor MIMO channel model and use the Matlab software to simulate the model. Firstly, we should establish the specific indoor scene and predict the path loss. By the comparison of the predicted and measured values, we can verify the correctness and validity of the model. Then, we analyse the MIMO capacity in theory. Lastly, we simulate and analyse the effect of SNR and the number of antennas on the MIMO channel capacity.