Earticle

초록

영어

The capacity of modern cellular wireless networks is mainly limited by inter-cell interference (ICI). Coordinated multi-point (CoMP) transmission and reception were adopted as key techniques for Long Term Evolution-Advanced (LTE-A) as they are capable of mitigating ICI through cooperation between several cell sites. Therefore, CoMP techniques provide a significant improvement in cell-edge and average throughput. For downlink CoMP, most research work mainly focuses on joint processing/transmission (CoMP-JP) mode. However this mode needs the access points (AP) to share the UEs' data and channel state information (CSI) simultaneously, resulting in a high overhead on the network. Coordinated beamforming (CoMP-CBF), which can avoid the data information exchange is a better solution to reduce the overhead.
In this paper, an improved cooperative beamforming schemes for downlink Coordinated Multi-point System is described. The proposed improved beamforming schemes rely on the principal eigen-vector feedback schemes (e.g. codebook based). Although the description of the beamforming schemes is not a part of specification, the detailed information on the used coordinated beamforming approaches is important for performance evaluation and calibration of the results during CoMP phase. System-level simulation results demonstrate that the proposed scheme can significantly reduce the ICI, and it performs well even with imperfect channel-state information (CSI) at the transmitter.

목차

Abstract
 1. Introduction
 2. System Model
 3. Conventional and Regularized Zero-Forcing Beamforming Schemes
 4. An Improved Beamforming Schemes
 5. Conclusion
 Acknowledgements
 References

키워드

저자

• Hongtao Guo [ North China University of Water Resources and Electric Power, Zhengzhou 450045, Henan, China. ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Signal Processing, Image Processing and Pattern Recognition

• 간기

  격월간

• pISSN

  2005-4254

• 수록기간

  2008~2016

• 십진분류

  KDC 505 DDC 605