An exact error probability analysis of OFDM systems with frequency offset

Authors:
Prathapasinghe Dharmawansa;Nandana Rajatheva;Hlaing Minn
Affiliations:
Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Kowloon, Hong Kong and School of Engineering and Technology, Asian Institute of Technology, Thail ...;School of Engineering and Technology, Asian Institute of Technology, Klong Luang, Pathumthani, Thailand;Department of Electrical Engineering, University of Texas at Dallas, Richardson, TX
Venue:
IEEE Transactions on Communications
Year:
2009

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Abstract

In this paper, we derive exact closed form bit error rate (BER) or symbol error rate (SER) expressions for orthogonal frequency division multiplexing (OFDM) systems with carrier frequency offset (CFO). We consider the performance of an OFDM system subject to CFO error in additive white Gaussian noise (AWGN), frequency flat and frequency selective Rayleigh fading channels. The BER/ SER performances of BPSK and QPSK modulation schemes are analyzed for AWGN and frequency-flat Rayleigh fading channels while BPSK is considered for frequency-selective Rayleigh fading channels. Our results can easily be reduced to the respective analytical error rate expressions for the OFDM systems without CFO error. Furthermore, the simulation results are provided to verify the accuracy of the new error rate expressions.