Journal of Broadcast Engineering (방송공학회논문지)

The Korean Institute of Broadcast and Media Engineers (한국방송∙미디어공학회)
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On the Gain of Component-Swapping Technique with DVB-T2 16K LDPC Codes in MIMO-OFDM Systems

DVB-T2 16K LDPC 부호가 적용된 MIMO-OFDM 시스템에서의 성분 맞교환 기술 이득

  • 전성호 (KBS 뉴미디어.테크놀로지본부 기술연구소) ;
  • 임중곤 (KBS 뉴미디어.테크놀로지본부 기술연구소) ;
  • 경일수 (KBS 뉴미디어.테크놀로지본부 기술연구소) ;
  • 김만식 (KBS 뉴미디어.테크놀로지본부 기술연구소)
  • Received : 2010.08.29
  • Accepted : 2010.11.12
  • Published : 2010.11.30
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Abstract

The signal space diversity is one of the promising transmission techniques in next generation mobile TV service. However, DVB-T2 does not consider the multiple antennas (MIMO) so that the cyclic Q-delay method, a component interleaver in DVB-T2, causes a critical issue in detecting symbols at the receiver side by increasing the inter-symbol dependency. To solve this problem, the component-swapping technique is proposed, which limits the inter-symbol dependency in order to reduce detection complexity. In this paper, the achievable gain of a component-swapping technique combined with 16K LDPC code defined in DVB-T2 is evaluated by computer simulations. From the results, the gain is confirmed in terms of BER and receive complexity compared to legacy component interleaver methods.

신호 공간 다이버시티 기술은 차세대 모바일 방송의 핵심 전송 기술로 주목받고 있는 기술 중 하나이다. 기존의 DVB-T2에 사용되는 Cyclic Q-delay 방식을 MIMO 시스템에 사용할 경우에는 심볼 간 상호 의존성이 증가하여 수신기 복잡도가 크게 증가하는 반면, 이러한 문제를 해결하기 위해서 제안된 '성분 맞교환(Component-Swapping)' 기술을 적용할 경우 상호 의존성이 제한되어 수신기 복잡도가 크게 줄어든다. 본 논문에서는 DVB-T2 16K LDPC 부호를 적용한 경우에 제안된 '성분 맞교환' 기술을 컴퓨터 시뮬레이션을 통해서 분석하고, 기존 기술 대비 BER 성능 및 복잡도 면에서 이득을 가짐을 확인하였다.

Keywords

References

  1. DVB Document A122, Framing Structure, Channel Coding and Modulation for a Second Generation Digital Terrestrial Television Broadcasting System (DVB-T2), June 2008.
  2. J. Boutros and E. Viterbo, ''Signal Space Diversity: A Power- and Bandwidth-Efficient Diversity Technique for the Rayleigh Fading Channel,'' IEEE Trans. Inform. Theory, vol. 44, no. 4, pp. 1453-1467, July 1998. https://doi.org/10.1109/18.681321
  3. S. Jeon, I. Kyung and M.-S. Kim, "Component-Interleaved Receive MRC with Rotated Constellation for Signal Space Diversity," in the 70th IEEE Semiannual Vehicular Technology Conference (IEEE VTC 2009-Fall), Anchorage, Alaska, USA, September 2009.
  4. S. Jeon, J. Lee, I. Kyung and M.-S. Kim, "Component-Interleaved Alamouti Coding with Rotated Constellations for Signal Space Diversity," in 2010 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (IEEE BMSB 2010), Shanghai, March 2010.
  5. S. M. Alamouti, "A Simple Transmit Diversity Technique for Wireless Communications," IEEE Journal on Select Areas in Communications, vol. 16, no. 8, pp. 1451-1458, October 1998. https://doi.org/10.1109/49.730453
  6. S. U. Hwang, J.-Y. Choi, S. Jeon, H. J. Ryu and J.-S. Seo, "Performance Evaluation of MIMO-OFDM with Signal Space Diversity over Frequency Selective Channels," in IEEE International Symposium on Broadband Multimedia System and Broadcasting (IEEE BMSB 2009), Bilbao, Spain, May 2009.
  7. S. Hong, J.-Y. Choi, S. U. Hwang, S. Jeon and J.-S. Seo, "Spatial Diversity Transmission Technique with Rotated Constellation for MIMO-OFDM Systems," in The 20th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE PIMRC2009), Tokyo, Japan, September 2009.
  8. S. Hong, J.-Y. Choi, S. U. Hwang, S. Jeon and J.-S. Seo, "Interleaved Spatial Diversity Transmission with Coordinate Interleaver for MIMO-OFDM Systems," in IEEE 69th Vehicular Technology Conference (IEEE VTC Spring 2009), Barcelona, Spain, April 2009.
  9. DVB-NGH Technical Document, "DVB-NGH Channel Models," TM-NGH063, 2010.