Probability of error of OFDM systems with carrier frequency offset in frequency-selective fading channels

• Published in: 2004 IEEE Itnernational Conference on Communications Vol. 6; pp. 3289 - 3293 Vol.6
• Main Authors: Rugini, L., Banelli, P., Cacopardi, S.
• Format: Conference Proceeding
• Language: English
• Published: Piscataway, New Jersey IEEE 2004
• Subjects: Applied sciences; Bit error rate; Conferences; Error probability; Exact sciences and technology; Frequency division multiplexing; Frequency-selective fading channels; Gaussian approximation; Information, signal and communications theory; Interference; Modulation, demodulation; Multiplexing; OFDM; Quadrature amplitude modulation; Rayleigh channels; Rician channels; Signal and communications theory; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Fading channels; Quadrature amplitude modulation; Error probability; Bit error rate; Generalized function; Rayleigh channels; Intercarrier interference; Rice fading; Gaussian process; Frequency selection; Carrier frequency; Simulation; Analytical method; Series expansion; Orthogonal frequency division multiplexing; Frequency offset; Rayleigh fading
• ISBN: 0780385330; 9780780385337
• DOI: 10.1109/ICC.2004.1313154

This paper presents an analytical approach to evaluate the error probability of orthogonal frequency-division multiplexing (OFDM) systems subject to carrier frequency offset (CFO) in frequency-selective channels, characterized by Rayleigh or Rician fading. By exploiting the Gaussian approximation of the intercarrier interference (ICI), we show that the bit-error rate (BER) for quadrature amplitude modulation (QAM) can be expressed by the sum of few integrals, whose number depends on the constellation size. Each integral can be evaluated numerically, or, in Rayleigh fading, by using a series expansion that involves generalized hypergeometric functions. Simulation results illustrate that the theoretical analysis is quite accurate, especially for Rayleigh channels.