A high-speed power-line communication system with band-limited OQAM based multi-carrier transmission

Naohiro Kawabata, Hisao Koga, Osamu Muta, Yoshihiko Akaiwa

研究成果: ジャーナルへの寄稿学術誌査読

9 被引用数 (Scopus)

抄録

As a method to realize a high-speed communication in the home network, the power-line communication (PLC) technique is known. A problem of PLC is that leakage radiation interferes with existing systems. When OFDM is used in a PLC system, the leakage radiation is not sufficiently reduced, even if the subcarriers corresponding to the frequencyband of the existing system are never used, because the signal is not strictly band-limited. To solve this problem, each subcarrier must be bandlimited. In this paper, we apply the OQAM based multi-carrier transmission (OQAM-MCT) to a high-speed PLC system, where each subcarrier is individually band-limited. We also propose a pilot-symbol sequence suitable for frequency offset estimation, symbol-timing detection and channel estimation in the OQAM-MCT system. In this method, the pilot signalsequence consists of a repeated series of the same data symbol. With this method, the pilot sequence approximately becomes equivalent to OFDM sequence and therefore existing pilot-assisted methods for OFDM are also applicable to OQAM-MCT system. Computer simulation results show that the OQAM-MCT system achieves both good transmission rate performance and low out-of-band radiation in PLC channels. It is also shown that the proposed pilot-sequence improves frequency offset estimation, symboltiming detection and channel estimation performance as compared with the case of using pseudo-noise sequence.

本文言語英語
ページ(範囲)473-482
ページ数10
ジャーナルIEICE Transactions on Communications
E92-B
2
DOI
出版ステータス出版済み - 2月 2009

!!!All Science Journal Classification (ASJC) codes

  • ソフトウェア
  • コンピュータ ネットワークおよび通信
  • 電子工学および電気工学

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