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

  • 제38A권2호
  • /
  • Pages.143-155
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  • 2013
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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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단일 송신 안테나 및 OFDM을 이용하는 두 사용자의 저 복잡도 동시 전송 기법

A Low Complexity Dual-User Multiplexing Scheme Using OFDM over Frequency Selective SIMO Fading Channels

  • 최병조 (인천대학교 임베디드시스템공학과 무선통신연구실)
  • 투고 : 2013.01.25
  • 심사 : 2013.02.12
  • 발행 : 2013.02.28
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초록

주파수 선택적 페이딩 환경에서 두 사용자가 OFDM 기법과 단일 안테나를 이용하여 기지국으로 동시에 신호를 전송할 때 다이버시티 이득을 효과적으로 얻고 다른 사용자의 간섭을 제거할 수 있는 기법을 제안한다. 이 기법은 기존의 주파수-공간 부호화 기법을 변형한 것으로 부분 간섭 제거 및 연속 간섭 제거 수신기를 통해 낮은 복잡도로 두 사용자의 신호를 복구할 수 있다. 주파수 다이버시티를 고려하지 않은 기존의 다중 전송 신호를 ZF 및 최대우도 기법으로 복호하는 기법과 비교하여 제안하는 기법의 우수한 성능을 모의실험을 통해 고찰하였다.

A low-complexity dual-user multiplexing scheme is proposed for a pair of mobiles equipped with single antenna operating over frequency-selective fading channels. The proposed scheme employs OFDM transmission scheme with a modified version of a space-frequency code and a low-complexity PIC-SIC group detection is invoked at the corresponding receiver. The BER performances of the proposed scheme are studied using LTE-like parameters through simulations and are compared against those of conventional ZF and ML schemes.

키워드

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