Iterative Synchronization for Dually Dually-Polarized Polarized Independent Transmission Streams
Abstract: In this paper, we investigate a wireless communication scenario, where polarization multiplexing is exploited to increase the spectral efficiency. Independent modems over each polarization are considered, with communication links affected by phase noise an and cross-polarization polarization interference (XPI). We devise a novel per-polarization polarization soft decision decision-directed directed iterative receiver with separate a posteriori probability-based based synchronization and decoding. The synchronization algorithm relies on a minimum mean square eerror-based based master-slave master phase estimation followed by the cancellation of the XPI on the polarization of interest and requires no statistical knowledge of the phase noise process. The performance of the proposed iterative receiver is investigated for a pilot pilo symbolassisted low-density density parity parity-check-coded coded quadrature amplitude modulation scheme.