Iterative Phase Noise Suppression for Full-Duplex Communication Systems

Oscillator phase noise is one of the bot-tlenecks that limits the self-interference (SI) cancella-tion capability of full-duplex systems. In this paper, we propose a method for the suppression of common phase error (CPE) and intercarrier interference (ICI) induced by the phase noise in full-duplex orthogo-nal frequency division multiplexing (OFDM) systems. First, we regard the effect of CPE as a portion of the SI channel and perform estimation, reconstruction and elimination in the time domain. Then, the ICI sig-nal is estimated and suppressed in the frequency do-main. Additionally, by analysing the performance of proposed algorithm, we further develop an iterative mechanism to reduce the parameter estimation error and improve SI cancellation capability. Simulation re-sults show that the proposed method has a significant SI cancellation capability improvement over the tradi-tional SI cancellation schemes.