Performance of OFDM with I/Q Imbalance and Phase Noise

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Md. Kislu Noman
Md. Ibrahim Abdullah, Md. Aktaruzzaman


This Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier transmission scheme that enables information to be transmitted at high data-rates with high robustness to the effects of noise and fading than single carrier transmission systems. It eliminates the interference between the sub-carriers and increases the spectral efficiency of the system. On the other hand, the OFDM system suffers from different drawbacks. The OFDM transmission exploits the strict orthogonality of each sub-carrier, which makes OFDM sensitive to frequency offsets and phase noise. The goal of this paper is to analyze the OFDM system with phase noise, nonlinear power amplifier and I/Q imbalance. Simulation result shows the BER performance of M-QAM in AWGN channel and Rayleigh fading channel and compares the BER performance of M-QAM.


Keywords: OFDM, I/Q imbalance, Phase Noise, AWGN, Rayleigh fading, BER, QAM.


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