瑞利平坦衰落MIMO无线信道容量及其估算
摘要
MIMO是在发射端和接收端都使用多天线阵列的数字无线通信技术，它利用无线通信环境中的多径传播来提高信道容量及频谱利用率，受到了广泛关注。本文主要研究典型无线通信环境下单用户瑞利平坦衰落MIMO信道的平均容量及其估算。研究工作以理论推导与Matlab数值仿真相结合，主要包括如下内容：中班家长会
1．用詹森不等式化简平均信道容量表达式。仿真结果表明在各种发射接收天线数量的情况下，在平均信噪比大龙虾蒸多久能熟(SNR)变化范围内，估算式是平均信道容量比较紧凑的上限表达式。
2．分高信噪比与低信噪比两种情况，用代数约等式化简平均信道容量表达式，其特点是平均信道容量可用信噪比的幂函数来近似，其系数是一个只与发射接收天线数量相关的常数，仿真结果表明其精确度较高。
3．引用平均信道渐近容量变化率，分析单用户瑞利平坦衰落一场雪MIMO信道的特征，找出平均信道容量与渐近容量变化率之间的关系，得到一种简单而且精确的估算表达式。
关键词：多输入多输出无线通信（MIMO），信道模型，多径衰落，频谱效率，平均信噪比，香农容量，平均信道容量，随机矩阵。
The Capacity of the Rayleigh Flat-fading
MIMO Channel and its Estimation
ABSTRACT
Multiple-input multiple-out (MIMO), a digital wireless communication technology using multiple-antenna arrays at both the transmitter and the receiver, have drawn comprehensive attention becau it can significantly increa the channel capacity and the radio spectral efficiency by utilizing the multi-path propagation in the wireless communication environment. The purpo of this paper is to study the ergodic capacity of the single-ur Rayleigh-flat-fading MIMO channel in the typical wireless communication environments and obtain the approximate expressions for the MIMO channel capacity. The study is the combination of theoretical deducing and Matlab numerical simulation, which mainly includes such as:
1. Using Jenn’s inequality to simplify the ergodic capacity of the MIMO channel. The numerical simulation results show the approximate expressions are the more compact upper bound expressions of the MIMO channel capacity in the ca of different antenna number of transmitter and receiver and for the total changing range of average signal-to-noi ratios (SNR).
免费景点
2. Using algebraic approximate equations to simplify the ergodic capacity of the MIMO channel in the two different cas of high and low SNR, it is special that the ergodic channel capacity can be approximated by the power function of SNR, who coefficient is a constant only in relation to the antenna number of the transmit and receive ends. The numerical simulate results show the approximations are quite accurate. 西游记白骨精
3. A simple and quite accurate approximate expression is obtained by introducing the asymptotic change rate of the MIMO ergodic channel capacity, analyzing the characteristic of the single-ur Rayleigh flat-fading MIMO channel and finding the relationship between the ergodic channel capacity and the asymptotic change rate of the channel capacity.强渡乌江
目标人生
描写鸟的句子Keywords:
Multiple-input multiple-output (MIMO) wireless communication, Channel models, Multi-path fading, Spectrum efficiency，Average signal to noi ratio (SNR), Shannon capacity, Ergodic channel capacity，Random matrix。
