With the development of modern mobile communication,the problem of shortage of spectrum resources and communication capacity is more and more serious.The channel capacity is one of the most important study contents in next generation mobile communication.Multiple input and multiple output is one of the key techniques in modern mobile communication.Firstly,this paper introduced the eigenvalue analysis method based on theory and system model of MIMO.Secondly,it presented the capacity formula of MIMO,then analysed system capacity when channel state information is unknown and channel state information is known at the transmitter.In the end,the simulation based on channel capacity,it shows the influence of the antenna numbers and the average SNR on the channel capacity.Then it compares the channel capacity of water powering allocation algorithm and average power allocation algorithm,what's more it studies on the impact of CSI on BER.%随着移动通信的发展,频谱资源短缺,通信容量不足的问题越来越明显.因此提高频谱利用率,提高信道容量显得至关重要.信道容量也是下一代移动通信中重要的研究内容之一.现代移动通信系统均采用多输入多输出系统(MIMO),文中首先在MIMO系统原理和系统模型的基础上介绍了信道特征值分析方法.然后给出了MIMO信道容量公式,并分析了在信道状态信息(CSI)未知和CSI已知这两种情况下的信道容量.对MIMO信道容量进行仿真,验证了天线数目和平均信噪比对信道容量的影响,通过仿真对比了注水功率分配算法和平均功率分配算法的信道容量,并探究了信道状态对误码率的影响.
展开▼
