J4 ›› 2013, Vol. 40 ›› Issue (4): 79-84+154.doi: 10.3969/j.issn.1001-2400.2013.04.013

• 研究论文 • 上一篇    下一篇



  1. (1. 西安电子科技大学 综合业务网理论及关键技术国家重点实验室,陕西 西安  710071;
    2. 洛阳师范学院 物理与电子信息学院,河南 洛阳  471022)
  • 收稿日期:2012-03-20 出版日期:2013-08-20 发布日期:2013-10-10
  • 通讯作者: 夏玉杰
  • 作者简介:夏玉杰(1978-),男,西安电子科技大学博士研究生,E-mail: yjxia@mail.xidian.edu.cn.
  • 基金资助:


Beamforming assisted successive interference cancellation initial ranging algorithm for OFDMA systems

XIA Yujie1,2;REN Guangliang1   

  1. (1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China;
    2. School of Physics and Electronic Information, Luoyang Normal Univ., Luoyang  471022, China)
  • Received:2012-03-20 Online:2013-08-20 Published:2013-10-10
  • Contact: XIA Yujie



关键词: 正交频分多址(OFDMA), 波束成形, 初始测距, 连续干扰消除


According to the effect of the frequency selectivity of multipath channel and multiuser access interference (MAI) on the initial ranging system in the orthogonal frequency division multiple access (OFDMA) network, a novel beamforming assisted successive interference cancellation initial ranging algorithm is presented by utilizing smart antennas at the base station in the next generation wireless communication systems. In the algorithm, the cell is divided into many small ranging sectors in the spatial domain by a group of beamforming vectors. The proposed algorithm is able to improve the signal-to-interference-plus-noise ratio of the desired ranging users in a given sector and suppress the MAI from other ranging sectors. In the small ranging sector, the multiuser ranging code detection and timing offset estimation are conducted by the simplified successive multiuser detection and interference cancellation (SMUD) method and the adaptive threshold. Simulation results show that the correct detection probability of the proposed algorithm is improved by 80% than that of the SMUD algorithm, with 15 ranging users in the ranging channel when the SNR is -6dB.

Key words: orthogonal frequency division multiple access, beamforming, initial ranging, successive interference cancellation