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Science China Information Sciences

, Volume 57, Issue 8, pp 1–9 | Cite as

A novel initial ranging algorithm for OFDMA systems using smart antenna

  • YuJie XiaEmail author
  • GuangLiang Ren
Research Paper
  • 57 Downloads

Abstract

To improve the capacity of initial ranging (IR) users simultaneously accessing into network and enhance the performance of the IR, a novel IR algorithm is presented for the orthogonal frequency division multiple access systems with the smart antenna. The beamforming weight vectors provided by the antenna array are introduced for the IR users, and the procedures of the multiuser parameter estimation and the interference cancellation are designed. The proposed method can improve the accuracy of the channel estimation of active paths and efficiently reduce the residual multiple access interference. Simulation results show that the proposed method has a much better performance than the available successive multiuser detection and interference cancellation algorithm and accommodates more active ranging users simultaneously accessing into a cell.

Keywords

orthogonal frequency division multiple access (OFDMA) initial ranging multiple access interference (MAI) beamforming smart antenna 

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Supplementary material

11432_2014_5129_MOESM1_ESM.pdf (32 kb)
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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.State Key Laboratory of Integrated Service NetworksXidian UniversityXi’anChina
  2. 2.Luoyang Normal UniversityLuoyangChina

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