A Tight Error Performance Bound for Systems with Doubly Selective Rayleigh Fading Channels


Theoretical error performances of communication systems with doubly-selective (time-varying and frequency-selective) fading channels are analyzed. The SISO systems with doubly selective fading channels are equivalently represented as discrete-time SIMO systems with correlated flat fading channels, where the correlation is determined by both the maximum Doppler spread (timedomain) and power delay profile (delay-domain) of the physical fading channel. Closed-form error probability expressions are derived as tight lower bounds of the system symbol error probabilities, and the temporal-delay two-dimensional correlation information are adopted in the error probability expressions. Simulation results show that the new analytical results can accurately predict the error performances of MLSE and MAP equalizers in a wide range of SNR. Moreover, it is discovered that the uncoded error performance of a system with doubly selective fading is affected by both the power delay profile and the Doppler spread of the physical fading channel, whereas the effects of Doppler spread are overlooked by all of the previous works.


Electrical and Computer Engineering

Keywords and Phrases

Error Performance Analysis; Wireless Communication Systems

Document Type

Article - Conference proceedings

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