The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Design and Performance Evaluation of Multilevel LDPC Codes

다중 레벨 LDPC 부호의 설계 및 성능 분석

  • 이광재 (한려대학교 멀티미디어 정보통신공학과) ;
  • ;
  • ;
  • 이문호 (전북대학교 전자정보공학부)
  • Published : 2004.01.01
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Abstract

We design multilevel coding(MLC) with a semi bit-interleaved coded modulation(BICM) scheme based on low density parity check(LDPC) codes. Different from traditional designs, we joint the MLC and BICM together by using the Gray mapping, which can transmit the multimedia data over several equivalent channels with different code rates. To get a good performance from signal-to-noise ratio(SNR) very close to the capacity of the additive white Gaussian noise(AWGN) channel, random regular LDPC code and a simple semi-algebra LDPC(SA-LDPC) code are discussed in MLC with parallel independent decoding(PID). Finally, the numerical results demonstrate that the proposed scheme could achieve both power and bandwidth efficiency for multimedia communication system.

본 논문에서는 LDPC에 근거한 semi-BICM 기법에 의해 다중 레벨 부호화(MLC)를 설계한다. 기존의 설계와는 다르게 그레이 매핑에 의해 MLC와 BICM을 결합함으로써 서로 다른 부호율(code rate)의 다수의 등가 채널상에서의 멀티미디어 데이터 전송이 가능하다. AWCN 채널용량에 매우 가까운 SNR에서 양호한 성능을 얻기 위해 랜덤 레귤러 LDPC 부호와 단순한 SA-LDPC 부호를 병렬 독립 복호가 가능한 MLC 부호로서 고찰하였다. 또한, 제안방식은 멀티미디어 통신시스템을 위한 전력 및 대역폭 효율을 얻을 수 있음을 수치해석 결과를 이용하여 나타내었다.

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References

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