On the performance of blanking nonlinearity in real-valued OFDM-based PLC
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© 2016 IEEE. To mitigate the impulsive noise in orthogonal frequency-division multiplexing (OFDM)-based power-line communications (PLC), a blanker can be employed at the receiver. In the literature, the performance of the blanker has been discussed and analyzed thoroughly. However, the analysis was limited only to passband OFDM PLC systems with complex-valued baseband representation. This paper aims to derive a mathematical expression of the output signal-to-noise ratio (SNR) of a blanker in baseband OFDM-based PLC, which are real-valued and used in some PLC standards. We also analyze the performance of separate real/imaginary blanking, instead of the traditional amplitude blanking, in passband OFDM-based PLC systems. It will be shown that the performance of amplitude blanking is similar to separate real/imaginary blanking in high signal-to-impulsivenoise ratio (SINR) values. However, when the SINR is low, the performance of amplitude blanking is better than the separate real/imaginary blanking. The difference is about 1 dB for SINR = -10 dB and 1.5 dB for SINR = -30 dB when signalto- background-noise ratio, SBNR = 25 dB and impulsive noise probability p = 0.01.
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Multiple blanking preprocessors for impulsive noise mitigation in OFDM-based power-line communication systemsLiong, A.A.G.; Juwono, Filbert Hilman ; Gopal, Lenin ; Chiong, C.W.R.; Rong, Yue (2021)Power-line communication (PLC) technology has been a critical enabler for smart grid systems. It provides two-way communication links without new infrastructure deployment. However, as the power-line was not designed to ...
Juwono, Filbert Hilman; Guo, Q.; Huang, D.; Wong, K. (2014)Nonlinear preprocessors, including clipping, blanking, and joint blanking/clipping have been proposed to be employed in orthogonal frequency-division multiplexing systems for mitigating the impulsive noise in power-line ...
Juwono, Filbert Hilman; Guo, Q.; Chen, Y.; Xu, L.; Huang, D.; Wong, K. (2016)© 2015 IEEE. Nonlinear preprocessors, including conventional clipping, blanking, joint blanking/clipping, and deep clipping, have been employed to mitigate the impulsive noise in orthogonal frequency division multiplexing-based ...