An adaptive channel model for VBLAST in vehicular networks
EURASIP Journal on Wireless Communications and Networking - Special issue on wireless access in vehicular environments
Effects of imperfections on the performance of OFDM systems
IEEE Transactions on Communications
Performance analysis of OFDM system over time-selective fading channels
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
EURASIP Journal on Wireless Communications and Networking
Analysis of joint Doppler, phase noise effects on OFDM systems in time varying channels
SARNOFF'09 Proceedings of the 32nd international conference on Sarnoff symposium
Mobile television receivers: a free-to-air overview
IEEE Communications Magazine
IEEE Transactions on Image Processing
A convex optimization approach to blind channel shortening in multicarrier modulations
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Tracking behavior of adaptive equalizers in filtered multitone communication systems
Asilomar'09 Proceedings of the 43rd Asilomar conference on Signals, systems and computers
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The focus of this paper is on the performance of orthogonal frequency division multiplexing (OFDM) signals in mobile radio applications, such as 802.11a and digital video broadcasting (DVB) systems, e.g., DVB-CS2. The paper considers the evaluation of the error probability of an OFDM system transmitting over channels characterized by frequency selectivity and Rayleigh fading. The time variations of the channel during one OFDM symbol interval destroy the orthogonality of the different subcarriers and generate power leakage among the subcarriers, known as inter-carrier interference (ICI). For conventional modulation methods such as phase-shift keying (PSK) and quadrature-amplitude modulation (QAM), the bivariate probability density function (pdf) of the ICI is shown to be a weighted Gaussian mixture. The large computational complexity involved in using the weighted Gaussian mixture pdf to evaluate the error probability serves as the motivation for developing a two-dimensional Gram-Charlier representation for the bivariate pdf of the ICI. It is demonstrated that its truncated version of order 4 or 6 provides a very good approximation in the evaluation of the error probability for PSK and QAM in the presence of ICI. Based on Jakes' model for the Doppler effects, and an exponential multipath intensity profile, numerical results for the error probability are illustrated for several mobile speeds