Compensation of phase noise in OFDM systems using an ICI reduction scheme

摘要

In Orthogonal Frequency Division Multiplexing (OFDM) communication systems, the local oscillator phase noise introduces two effects: common phase error (CPE) and inter-carrier interference (ICI). The correction of CPE does not suffice always, especially when high data rates are required. Through the creation of a frequency-domain linearized parametric model for phase noise, we generate an ICI reduction scheme to deal with phase noise. The effects of the transmitter high-power-amplifier (HPA) nonlinearity on the phase noise compensation are also investigated. The algorithm performance over AWGN channel is presented for DVB-T 2k and 8k modes. It is shown by the simulation results that the algorithm can significantly reduce the symbol-error rate (SER) floor, caused by the residual phase noise after CPE correction, while sacrificing an acceptable transmission bandwidth.