分析和讨论了频率复用通信系统带来的交叉极化干扰问题，也是卫星移动通信系统的关键技术之一，对工程人员有很大的指导意义。-Analysis of the cross-polarization interferencein the frequency re-use communication system. It s one of the core technique for mobile satcom. It s a good instruction for engineers.