M-QAM OFDM and PCC-OFDM performance in the presence of phase noise.

In this paper we address the issue of OFDM and PCC-OFDM systems impaired by phase noise (PN). PCC-OFDM is a variation of OFDM in which data is mapped onto adjacent subcarrier pairs. As a result intercarrier interference (ICI) in adjacent subcarriers is cancelled. Phase noise in OFDM causes both ICI and common phase error (CPE). PCC-OFDM reduces the ICI component, but the CPE is unchanged. Theoretical and simulations results for bit error rate (BER) are presented for M-QAM OFDM and PCC-OFDM systems over Rayleigh fading channels. The performance with and without CPE correction at the receiver is considered. It is shown that PCC-OFDM has a lower BER in all cases. The theoretical results agree closely with the computer simulations.

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