On enhancing the performance of the DPTE-based noise cancellation method utilizing the PTS PAPR reduction scheme in PLC systems

Several methods have been proposed in the literature for impulsive noise (IN) blanking and the most efficient of which is the dynamic peak-based threshold estimation (DPTE). In this method only estimates of the signal peaks are required in order to optimally blank the noise. In this paper we propose to enhance the capability of the conventional DPTE technique by pre-processing the OFDM signal at the transmitter. This is simply done by applying the partial transmit sequence (PTS) scheme. To evaluate system performance we consider the probability of blanking error (P_b), probability of missed blanking (P_m), probability of successful detection (P_s) and the signal-to-noise ratio (SNR) at the output of the blanking device. The results reveal that DPTE-PTS technique can significantly minimize both P_b and P_m and maximize P_s. Furthermore, it will be shown that the proposed system can achieve up to 1.5 dB SNR enhancement over the conventional DPTE scheme.