Iterative equalization for single-carrier cyclic-prefix in doubly-dispersive channels

Abstract

Single-carrier cyclic prefix (SCCP) has been proposed as an alternative to orthogonal frequency division multiplexing (OFDM). While the implementation complexity of the two schemes are comparable, SCCP avoids the peak-to-average power ratio problem that plagues OFDM. Both OFDM and SCCP receivers leverage the fast Fourier transform for computationally-efficient frequency-domain equalization. For channels that are significantly time-varying, however, frequency-domain equalization alone is inadequate. Several OFDM receiver modifications have been proposed for this time-varying case, including one which uses linear pre-processing and iterative estimation to yield excellent performance with low complexity. Here we design an SCCP receiver based on similar concepts.