On Time-Varying FIR Decision Feedback Equalization of Doubly Selective Channels
L. Song, JITENDRA K. TUGNAIT · 2008
We consider decision feedback equalization of doubly selective channels modeled via basis expansion models (BEM). Recently there has been some interest in designing time-variant serial FIR (finite impulse response) decision feedback equalizers (DFE) using complex exponential (CE-) BEMs for equalizers in addition to using CE-BEM for modeling the channel itself. In this paper we show that an alternative formulation of the FIR DFE based on a CE-BEM channel model yields the same or an improved BER at a lower computational cost, without incuring the approximation error inherent in CE-BEM modeling of equalizers.