中文说明：
采用正交频分复用（OFDM）技术，研究了一种采用双极化天线（dpa）的2x2多输入多输出（MIMO）结构。在受偏振模色散（PMD）和偏振相关损耗（PDL）影响的时变多径信道中，对DPAs的性能进行了评估。所考虑的AP传输技术包括功率增益最大化、用于避免干扰的偏振色散最小化、带注水的偏振复用以及能够直接恢复偏振复用流的次优复用策略，从而简化接收机的设计。通过实测的时变双极化信道实现，从移动到移动的实验来估计自适应方法的容量、分集和抗干扰性能。
English Description：
A 2x2 multiple-input multiple-output (MIMO) architecture using dual-polarized antennas (DPAs) is considered with orthogonal frequency division multiplexing (OFDM). The performance of DPAs is evaluated for adaptive polarization (AP) transmission techniques in time-varying multipath channels impaired by polarization mode dispersion (PMD) and polarization-dependent loss (PDL). AP transmission techniques considered include power gain maximization, polarization dispersion minimization for interference avoidance, polarization multiplexing with waterfilling, and a suboptimal multiplexing strategy that enables direct recovery of the polarization multiplexed streams, thereby simplifying the design of the receiver. Measured time-varying dual-polarized channel realizations from mobile-to-mobile experiments are used to estimate the capacity, diversity, and interference avoidance performance of the adaptive approaches.