Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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A Downlink Beamforming Method with Phase Reference to Common Pilot Channel in Cellular Systems

셀룰라 시스템에서의 공통 파일럿 채널에 기반한 다운링크 빔포밍 방안

  • Joonsung, Lee (Dept. of Electrical and Electronic Engineering, Yonsei University, Seoul, Korea) ;
  • Chungyong, Lee (Dept. of Electrical and Electronic Engineering, Yonsei University, Seoul, Korea)
  • Published : 2004.10.01
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Abstract

A new downlink beamforming method is proposed for coherent detection of Cellular systems with BPSK modulation where there exists only common pilot channel. To solve phase mismatch between traffic and pilot signals at desired mobile and to reduce interference to other mobiles, the proposed downlink beamforming method considers a cost function of signal to interference ratio criteria and gives a solution for the cost function. The computer simulation showed that the proposed method can solve the phase mismatch problem and give improved BER performance in time-varying channels.

본 논문에서는 셀룰라 이동통신 시스템에서 BPSK 신호전송시 공통 파일럿 신호가 존재하는 상황에서의 코히어런트 검출을 위한 다운링크 빔포밍 방안을 제안한다. 통화채널과 공통채널의 위상차이를 줄이며 다른유저의 간섭을 줄이기 위해 신호대 간섭비를 기반으로 하는 비용함수와 이를 구하는 방안을 제안한다. 모의실험결과를 통해 제안된 방안이 두 채널간의 위상차이를 줄이고 시변채널에서의 개선된 비트오율 성능을 확인 할 수 있다.

Keywords

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