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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Uplink Pilot Signal Design for Mobile Wireless Backhaul

이동무선백홀을 위한 상향링크 파일럿 신호 설계

  • Choi, Seung Nam (Giga Communication System Research Section 2, Electronics and Telecommunications Research Institute) ;
  • Kim, Ilgyu (Giga Communication System Research Section 2, Electronics and Telecommunications Research Institute) ;
  • Kim, Dae Jin (School of Electronics and Computer Engineering, Chonnam National University)
  • Received : 2015.03.26
  • Accepted : 2015.06.05
  • Published : 2015.06.30
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Abstract

In this paper, an uplink pilot signal structure is proposed for millimeter wave(mmWave)-based mobile wireless backhaul. For the transmit diversity of two antenna ports, uplink pilot signals generated from the Zadoff-Chu sequence can be mapped in an interleaved mode or continuous mode on the frequency axis, and channel estimation algorithms are different depending on the pilot signal mapping schemes. Through a simulation under Rayleigh fading channel assuming a subway scenario, the interleaved mapping scheme showed no performance degradation compared to the continuous mapping scheme and the implementation complexity of the uplink channel estimator was reduced due to the interleaved mapping scheme.

본 논문에서는 밀리미터파를 활용한 이동무선백홀에서 상향링크의 파일럿 신호 구조를 제안하였다. Zadoff-Chu 시퀀스를 이용하여 생성된 파일럿 신호는 두 개의 안테나 포트에 대한 송신 다이버시티를 위하여 주파수 축 상에서 교차 매핑 또는 연속 매핑되는 구조가 가능하며, 파일럿 신호의 매핑 방법에 따라 채널 추정 알고리즘이 달라진다. 시뮬레이션을 통해 지하철 환경을 가정한 레일리 페이딩 채널에서 성능을 분석한 결과, 교차 매핑 방법이 연속 매핑 방법에 비해 채널 추정의 성능 열화가 없었고 이 방법을 사용하여 상향링크 채널 추정기의 구현 복잡 도를 줄일 수 있었다.

Keywords

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