Common phase error cancellation scheme with DPOLSK in OFDM system

Abstract

In order to cancel the common phase error (CPE) in OFDM system, a novel scheme employing differential polarization shift keying (DPOLSK) is proposed. In the proposed scheme, we use the phase difference between a couple of orthogonally polarized components to bear the data information at the transmitter. Moreover, at the receiver the constellation rotation caused by CPE could be effectively cancelled, by reversing the phase of one component which can make the direction of constellation rotation of two components opposite and equal, and then multiplying the two components. Numerical results and analysis show that the proposed scheme achieves the same spectral efficiency as the conventional scheme while outperforming in bit error rate (BER).