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.