Impact of Phase Noise on Orthogonal Frequency Division Multiplexing (OFDM) Systems with Correction Algorithms

This article provides a detailed analysis of phase noise impacts on Orthogonal Frequency Division Multiplexing (OFDM) systems. Phase noise not only generates Common Phase Error (CPE) but also causes Inter-Carrier Interference (ICI), both of which severely degrade OFDM system performance. Consequently, correcting both CPE and ICI is essential. We propose a CPE correction method based on the Mean Squared Error (MSE) criterion, implemented by estimating phase rotation using known pilot symbols and applying a phase compensation factor to all subcarriers. Recognizing that ICI primarily originates from adjacent subcarriers, we develop an adaptive adjacent-channel interference cancellation approach using the Least Mean Squares (LMS) algorithm. The LMS implementation involves iteratively adjusting filter weights to minimize interference through real-time error feedback. The complete algorithm is computationally simple and efficient, requiring only basic arithmetic operations for phase correction and low-complexity adaptive filtering. Simulation results confirm that the proposed methodology significantly improves OFDM system performance by effectively mitigating both CPE and ICI distortions.