Journal of Korea Society of Digital Industry and Information Management (디지털산업정보학회논문지)

Korea Society of Digital Industry and Information Management (디지털산업정보학회)
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Novel Beamforming and Scheduling Method for Interference Mitigation at Cell Edge

셀 경계 지역 간섭 완화를 위한 효율적 빔포밍 및 스케쥴링 방법

  • 김경훈 (한양대학교 전자컴퓨터공학과 통신신호처리 연구실) ;
  • 최승원 (한양대학교 전자컴퓨터공학과)
  • Published : 2012.12.30
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Abstract

Coordinated multi-point transmission (CoMP) is a candidate technique for next generation cellular communications systems. One of the primary elements discussed in LTE-Advanced technology is CoMP, which can improve cell edge user data rate as well as spectral efficiency due to multiple input multiple output - orthogonal frequency division multiplex (MIMO-OFDM). We consider a system with multiple cells in which base stations coordinate with each other by sharing user channel state information (CSI), which mitigates inter cell interference (ICI), especially for users located at the cell edge. We introduce a new user scheduling method of ICI cancellation and the loss reduction of effective channel gain during the beamforming process, the proposed method improves the system sum rate, when compared to the conventional method by an average of 0.55bps/Hz in different number of total users per cell. It also outperforms the conventional method by approximately 0.38bps/Hz using different SNRs.

Keywords

References

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