分布式双极化卫星移动MIMO信道模型

摘要

For the study of distributed dual⁃polarized MIMO land mobile satellite ( MIMO⁃LMS ) system, a statistical model for the channels is proposed after the analysis of the channel characteristics. The second order statistics are calculated and channel capacity of different type of MIMO⁃LMS system is estimated. Considering the Doppler spread in the small scale fading and selecting the proper form of MIMO model, the channel model can keep the statistic characteristics as well as the correlation of the sub⁃channels unchanged. The simulation result shows that the channel capacity can be increased by applying MIMO to LMS communication and enhances with the increasing number of the antennas.%为更好研究分布式双极化卫星移动MIMO通信系统，在对其信道特性进行分析的基础上，建立了信道模型，计算该信道模型的二阶统计量并估算系统信道容量。模型保证子信道之间的相关性与信道的统计特性不变，并考虑多普勒频谱扩展对小尺度衰落的影响。仿真结果表明，将MIMO技术应用于卫星通信中能够提高系统信道容量，信道容量与系统天线数正相关。