Millimeter-wave communication is expected to be the next-generation wireless communication. Local oscillator phase noise in such transceiver, however, degrades the performance of orthogonal frequency division multiplexing (OFDM) modulation that has been a key technology in high data-rate communication. To address this issue, a low-complexity inter-carrier interference (ICI) and common phase error (CPE) mitigation method for millimeter-wave OFDM systems in the presence of local oscillator phase noise is proposed in this paper. The frequency domain received signals are simply added to each other with complex coefficients which are estimated by least-mean-square (LMS) algorithm utilizing pilot signals in each OFDM symbol. The analysis of OFDM transmission is presented to validate the proposed method. Simulation results show that the proposed method improves the system performance by 5 dB with bit error rate (BER) being 10.
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