Baseband Cross‐Polarization Interference Cancellation for M‐Quadrature Amplitude‐Modulated Signals Over Multipath Fading Radio Channels

In this paper we propose a novel baseband structure capable of adaptively mitigating cross‐polarization interference in a dual‐polarized, M‐state quadrature amplitude‐modulated received signal. We show that by using this canceler, performance signatures very close to single‐polarized system signatures can be achieved for dually polarized digital radio systems.