Receiver of FTN signal with oversampling

Abstract

Faster-than-Nyquist (FTN) signalling, as a bandwidth-efficient modulation format, attracts many researchers’ attention. However, the symbol rates of FTN signal are increasing when the packing ratios decreases. Moreover, the FTN signal with small packing ratios requires a high-rate analogue-to-digital converter. Since the bandwidth of FTN signal remains the same, the samples taken at Nyquist sampling rate do not suffer information loss. However, the variable packing ratios induce extra memory-consumption when the FTN signal is sampled at Nyquist sampling rate. To reduce the sampling rate and the memory-consumption, a new receiver of FTN signal with oversampling is proposed. Simulation results show that the receiver can perform close to the convolution code line. At the same time, the sampling rate and the memory-consumption can be reduced by adjusting the oversampling factors according to the packing ratios.