An uncoded BER comparison between DFE-SCCP and OFDM using a convex analysis framework

Abstract

Abstract-This article aims to establish a theoretical performance comparison between the Single Carrier with Cyclic Prefix (SCCP) equalized with a Decision Feedback Equalizer (DFE) and the Orthogonal Frequency Division Multiplexing (OFDM) systems. We consider an uncoded scenario and we derive analytical relations between these systems's bit error rate (BER). The comparison is accomplished for different modulation schemes.

A comparison between OFDM and single-carrier with cyclic prefix using channel coding and frequency-selective block fading channels

“…In [28], the BER of the OFDM was compared to the BER of the DFE-SCCP and it was proved that the DFE-SCCP surpasses the OFDM for QPSK and 16-QAM modulations for any channel configuration. In [15] and [28] the schemes are compared through a simple convex analysis.…”

“…In [28], the BER of the OFDM was compared to the BER of the DFE-SCCP and it was proved that the DFE-SCCP surpasses the OFDM for QPSK and 16-QAM modulations for any channel configuration. In [15] and [28] the schemes are compared through a simple convex analysis. This analysis can be extended for higher order modulation schemes and in those cases it is noted that the problem is not convex anymore and thereby the OFDM can excel the DFE-SCCP in some channel configurations.…”

Influence of Channel Frequency Selectivity and Modulation Order on the Performance Difference Between DFE-SCCP and OFD

“…For instance, [2] and [7] are restricted to just one kind of modulation, such as binary phase-shift keying or quadrature phase-shift keying (QPSK) and finally, they fail to generalize the comparison to any channel configuration. Other comparisons establish an analytical treatment to the problem, but their results are not applied to systems using channel coding [8]- [11]. Concerning the comparison with analytical results under a coded context, [12] provides an interesting result using the cutoff rate [13], but it solely analyzes the effect of the coding rate considering linear equalization for the SCCP and a two-tap block-fading channel configuration scenario.…”