ABSTRACT: Orthogonal Frequency Division Multiplexing (OFDM) systems are commonly used to mitigate frequency-selective multipath fading
and provide high-speed data transmission. In this paper, we derive new union bounds on the error probability of a coded OFDM
system in wireless environments. In particular, we consider convolutionally coded OFDM systems employing single and multiple
transmit antennas over correlated block fading (CBF) channels with perfect channel state information (CSI). Results show that
the new union bound is tight to simulation results. In addition, the bound accurately captures the effect of the correlation
between sub-carriers channels. It is shown that as the channel becomes more frequency-selective, the performance get better
due to the increased frequency diversity. Moreover, the bound also captures the effect of multi-antenna as space diversity.
The proposed bounds can be applied for coded OFDM systems employing different coding schemes over different channel models.
KeywordsDiversity–Error probability–Rayleigh–Fading–Space-time block codes–MIMO–OFDM–Correlated block fading
Wireless Personal Communications 04/2012; 60(2):307-320. · 0.46 Impact Factor