Proceedings of the Korean Institute of Information and Commucation Sciences Conference (한국정보통신학회:학술대회논문집)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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A Study on Receiving Performance Improvement of LTE Using Hybrid OFDMA/SC-FDMA

Hybrid OFDMA/SC-FDMA를 이용한 LTE 수신성능 개선에 관한 연구

  • Park, Chan-Hong (School of Computer Information and Communication Eng. Sangji University) ;
  • Jang, Sung-Won (School of Computer Information and Communication Eng. Sangji University) ;
  • Park, Sang-Joo (School of Computer Information and Communication Eng. Sangji University) ;
  • Han, Young-Hwan (School of Computer Information and Communication Eng. Sangji University) ;
  • Seong, Hyeon-Kyeong (School of Computer Information and Communication Eng. Sangji University)
  • 박찬홍 (상지대학교 컴퓨터정보공학부) ;
  • 장성원 (상지대학교 컴퓨터정보공학부) ;
  • 박상주 (상지대학교 컴퓨터정보공학부) ;
  • 한영환 (상지대학교 컴퓨터정보공학부) ;
  • 성현경 (상지대학교 컴퓨터정보공학부)
  • Published : 2010.10.27
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Abstract

In the paper, the researcher has proposed to install a relay between Base Station (BS) and Mobile Station (MS) to improve receiving performance of the downlink transmission method of Long Term Evolution (LTE) system whose standards now being established by 3GPP. By setting the distance between the location of BS and the relay installed as by 500m, 1000m, and selecting OFDMA and SC-FDMA as transmission method, the researcher conducted a study to improve the receiving performance of LTE. The results from study revealed that when the location of Relay Station (RS) was closer to BS, it was better to use OFDMA at BS, and SC-FDMA at RS. On the contrary, when the distance between BS and RS was farther, it was better to use SC-FDMA at BS, and OFDMA at RS. In addition, around the center zone between the location of BS and of MS, the researcher was able to improve the receiving performance of the system by utilizing the transmission method suitable for the situation in that area.

본 논문에서는 현재 3GPP에서 진행되고 있는 차세대 이동통신 기술 표준, 즉 LTE 시스템의 하향 링크 전송방식의 수신성능을 향상시키기 위해 기지국(BS)과 단말(MS) 사이에 릴레이(RS) 설치를 제안하고, BS의 위치와 설치된 RS의 거리를 각각 500m, 1000m로 하고 RS의 전송방식을 OFDMA와 SC-FDMA를 선택함으로써 수신성능을 높이기 위한 연구를 수행 하였다. 연구결과 RS의 위치가 BS와 가까울수록 RS에서는 SC-FDMA를 사용하는 것이 좋게 나왔고, 반대로 BS와 RS의 거리가 멀어질수록 RS에서는 OFDMA를 사용하는 것의 성능이 좋은 것으로 나왔다. 또한 BS와 MS 거리의 중심지역에서는 그 상황에 맞는 전송방식을 사용함으로써 시스템의 수신성능을 향상시킬 수 있었다.

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