Robust Transceiver To Combat Periodic Impulsive Noise In Narrowband Powerline Communications
2015 IEEE International Conference on Communications (ICC)(2015)
摘要
Non-Gaussian noise/interference severely limits communication performance of narrowband powerline communication (PLC) systems. Such noise/interference is dominated by periodic impulsive noise whose statistics varies with the AC cycle. The periodic impulsive noise statistics deviate significantly from that of additive white Gaussian noise, thereby causing dramatic performance degradation in conventional narrowband PLC systems. In this paper, we propose a robust transmission scheme and corresponding receiver methods to combat periodic impulsive noise in OFDM-based narrowband PLC. Towards that end, we propose (1) a time-frequency modulation diversity scheme at the transmitter and a diversity demodulator at the receiver to improve communication reliability without decreasing data rates; and (2) a semi-online algorithm that exploits the sparsity of the noise in the frequency domain to estimate the noise power spectrum for reliable decoding at the diversity demodulator. In the simulations, compared with a narrowband PLC system using Reed-Solomon and convolutional coding, whole-packet interleaving and DBPSK/BPSK modulation, our proposed transceiver methods achieve up to 8 dB gains in E-b/N-0 with convolutional coding and a smaller-sized interleaver/deinterleaver.(1)
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关键词
robust transceiver,combat periodic impulsive noise statistics,narrowband powerline communication reliability,nonGaussian noise,nonGaussian interference,narrowband PLC system communication performance degradation,AC cycle,additive white Gaussian noise,robust receiver,OFDM-based narrowband PLC system,time-frequency modulation diversity scheme,robust transmitter,diversity demodulator,semionline algorithm,noise sparsity,frequency domain,decoding,Reed-Solomon coding,convolutional coding,whole packet interleaving,DBPSK modulation,BPSK modulation
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