Coordinated beamforming with relaxed zero forcing

G. Lee, J. Park, Y. Sung, M. Yukawa

研究成果: Conference contribution

9 被引用数 (Scopus)

抄録

In this paper, a new beam design paradigm for coordinated beamforming (CB) for current and future cellular networks is proposed based on a relaxed zero-forcing (RZF) constraint. In the conventional zero-forcing (ZF) CB, each cooperating transmitter designs its transmit beamforming matrix to null out interference to undesired receivers completely. In the proposed RZF paradigm, however, the ZF constraint is relaxed so that a tolerable amount of interference leakage to undesired receivers is allowed for the beam design at each transmitter. By relaxing the ZF constraint in such a way, transmitters have more degrees of freedom for their beam design to increase the overall data rate of the network. An efficient algorithm for the RZFCB is proposed based on a projected subgradient method. Numerical results show that the proposed RZFCB shows a noticeable gain over the conventional ZFCB.

本文言語English
ホスト出版物のタイトル2011 International Conference on Wireless Communications and Signal Processing, WCSP 2011
DOI
出版ステータスPublished - 2011 12月 1
外部発表はい
イベント2011 International Conference on Wireless Communications and Signal Processing, WCSP 2011 - Nanjing, China
継続期間: 2011 11月 92011 11月 11

出版物シリーズ

名前2011 International Conference on Wireless Communications and Signal Processing, WCSP 2011

Other

Other2011 International Conference on Wireless Communications and Signal Processing, WCSP 2011
国/地域China
CityNanjing
Period11/11/911/11/11

ASJC Scopus subject areas

  • コンピュータ ネットワークおよび通信
  • 信号処理

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