BLER of Turbo SIC Multiplying Weighting Factor to Symbol Estimates for OFDM Using FTN Signaling

This paper proposes multiplying a weighting factor of less than one to the interfering orthogonal frequency division multiplexing (OFDM) symbol esti-mates in a turbo soft interference canceller (SIC) for OFDM applying faster-than-Nyquist (FTN) signaling. Computer simulation results show that by multiplying the weighting factor of 0.8 or 0.9 to the interfering OFDM symbol estimates, the required average received signal-to-noise ratio (SNR) satisfying the target aver-age block error rate (BLER) is decreased significantly assuming the same improvement level in the spectral efficiency of the FTN signaling compared to cyclic pre x based OFDM using 16QAM associated with the turbo coding rates of 1/3 and 1/2 in multipath Rayleigh fading channels.