Journal of Korea Society of Industrial Information Systems (한국산업정보학회논문지)

Korea Society of Industrial Information Systems (한국산업정보학회)
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A spectral efficient transmission method for ofdm-based power line communications

직교주파수분할다중화기반 전력선통신에서 대역 효율적인 전송기법

  • 김병욱 (경일대학교 전기철도공학부)
  • Received : 2014.05.07
  • Accepted : 2014.08.18
  • Published : 2014.08.30
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Abstract

Powerline communications (PLC) is a promising medium for network access technology where smart grid aided network services can be provided. In the presence of frequency selective fading in the PLC channel, orthogonal frequency division multiplexing (OFDM) is a technique for reliable communications. This paper presents a spectral efficient method using a superimposed hidden pilot for OFDM-based PLC systems. Based on the scheme using a hidden pilot, it is possible to estimate the channel with no consumption of bandwidth, but with utilization of power allocated to the hidden pilot. Computer simulations showed that the proposed scheme provides higher achievable data rate than that of the conventional schemes in low voltage and medium voltage transmission lines.

전력선통신은 스마트그리드 기반의 서비스가 제공될 수 있는 네트워크를 위한 미래지향적 기술이다. 전력선통신 채널의 주파수 선택적 페이딩이 있는 환경에서, 직교주파수분할다중화 기술은 신뢰성 있는 통신을 제공한다. 본 논문에서는 직교주파수분할다중화 기반의 전력선통신 시스템에서 은닉학습신호를 이용한 주파수사용효율이 높은 기법을 제안한다. 은닉학습신호를 사용하면 채널 추정용 주파수를 따로 소모하지 않고도 채널 추정이 가능하고, 이는 데이터와의 간섭을 줄일 수 있는 학습신호에 할당된 파워를 이용해서 해결할 수 있다. 컴퓨터 시뮬레이션을 통해 제안한 기법이 기존의 기법들에 비해 저전압 및 중전압 송전 라인에서 높은 성취 가능한 데이터 율을 보여준다.

Keywords

References

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