An architecture for non-orthogonal multi-carrier faster-than-nyquist transmission

Abstract

This paper considers a multicarrier faster-than-Nyquist (FTN) transceiver architecture when spectrally efficient frequency division multiplexing (SEFDM) is also utilized at the transmitter. The received symbols are corrupted by both the introduced inter-symbol interference (ISI) due to FTN and inter-carrier interference (ICI) due to SEFDM. The interferences have to be eliminated to recover the transmitted data at the receiver. We propose a receiver architecture using a specific matched filter architecture that yields uncorrelated noise samples at the receiver. We investigate the bit error rate (BER) performance of coded transmission when iterative (turbo) equalization is used. Finally, we also present EXIT curves and decoder trajectories for the simulated systems.