한국통신학회논문지 (The Journal of Korean Institute of Communications and Information Sciences)

  • 제41권5호
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  • Pages.520-530
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  • 2016
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  • 1226-4717(pISSN)
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  • 2287-3880(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
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주파수 분할 방식의 거대 다중 안테나 시스템을 위한 빔형성 기반의 채널상태정보 기준신호 전송기술

Beamforming Based CSI Reference Signal Transmission for FDD Massive MIMO Systems

  • Hong, Jun-Ki (Yonsei University, Department of Electrical and Electronic Engineering) ;
  • Jo, Han-Shin (Hanbat National University, Department of Electronics and Control Engineering) ;
  • Mun, Cheol (Korea National University of Transportation, Dept. of Information and Communication Engineering) ;
  • Yook, Jong-Gwan (Yonsei University, Department of Electrical and Electronic Engineering)
  • 투고 : 2016.01.29
  • 심사 : 2016.04.28
  • 발행 : 2016.05.31
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초록

기존 MIMO 시스템 대비 수십 또는 수백 배 많은 송신 안테나들이 설치되어 있는 주파수 분할(frequency division duplex, FDD) 방식의 거대 다중 안테나(massive multiple-input mulitple-output, Massive MIMO)에선 송신 안테나 별 CSI-RS(channel state information reference signal) 전송을 위해 기존 MIMO 시스템 대비 너무 많은 하향 및 상향링크 자원 요소가 필요하다는 한계를 갖는다. 이러한 단점들을 극복하기 위해 본 논문에선 주파수 분할 방식의 거대 다중 안테나 시스템에서 많은 송신 안테나를 사용하더라도 자원요소(resource element, RE)를 재사용함으로써 송신 안테나 수에 비례하지 않는 제한된 양의 하향링크 자원만을 사용하여 CSI-RS를 효과적으로 전송하는 기술 및 자원격자 구조를 제안하였다.

Since FDD massive MIMO (multiple-input multiple-output) system deploys hundreds of transmit antennas at base station (BS) compared to conventional MIMO system, the overhead of transmitting channel state information reference signal (CSI-RS) increases proportionally to the number of transmit-antennas. To overcome these disadvantages, we proposed beamforming based CSI-RS transmission technique for FDD massive MIMO system which transmit CSI-RS by limited amount of downlink resources.

키워드

참고문헌

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피인용 문헌

  1. 협력 인지 통신망에서의 전 이중 통신 vol.41, pp.11, 2016, https://doi.org/10.7840/kics.2016.41.11.1374
  2. FTN 기반 전송 시스템의 성능 평가 기준에 관한 연구 vol.41, pp.11, 2016, https://doi.org/10.7840/kics.2016.41.11.1645