https://scholars.lib.ntu.edu.tw/handle/123456789/557634
標題: | Cyclostationary impulsive noise mitigation in the presence of cyclic frequency offset for narrowband powerline communication systems | 作者: | Chien, Y.-R. Lin, J.-L. HEN-WAI TSAO |
關鍵字: | Cyclic frequency offset; Cyclostationary impulsive noise (CSIN); FRESH filter; IEEE 1901.2; Narrowband powerline communication (NB-PLC); OFDM | 公開日期: | 2020 | 卷: | 9 | 期: | 6 | 來源出版物: | Electronics (Switzerland) | 摘要: | Cyclostationary impulsive noise (CSIN) is the dominant source of additive noise in narrowband powerline communication (NB-PLC) systems. Frequency-shift (FRESH) filters have been applied to NB-PLC systems based on orthogonal frequency division multiplexing (OFDM) to mitigate CSIN and enhance the OFDM signals by leveraging the difference in cyclic frequency associated with CSIN and OFDM data symbols. Note that under the effects of frequency fluctuation in the mains voltage, the cyclic frequency offset associated with CSIN can degrade the performance of FRESH-filter receivers. To alleviate such an impact on the FRESH-filter receivers, this paper presents a method for the estimation of the cyclic frequency offset by observing phase variations in the coefficients of the FRESH filter. Computer simulations based on IEEE 1901.2 specifications demonstrate the effectiveness of the proposed scheme in suppressing the cyclic frequency relative error by at least 15.45 dB. Following compensation for the cyclic frequency offset, the proposed scheme achieved a bit error rate of 10−4 with an Eb /N0 loss of only 0.7 dB, compared with the ideal case. Compared to the case without the cyclic frequency offset compensation, the proposed scheme achieved an Eb /N0 gain of 2.7 dB. © 2020 by the authors. Licensee MDPI, Basel, Switzerland. |
URI: | https://www.scopus.com/inward/record.url?eid=2-s2.0-85086448270&partnerID=40&md5=2abcca9ffaaee6288be243f562c7084c https://scholars.lib.ntu.edu.tw/handle/123456789/557634 |
DOI: | 10.3390/electronics9060988 |
顯示於: | 電機工程學系 |
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