Performance evaluation of CDMA reverse links with imperfect beamforming in a multicell environment using a simplified beamforming model

J Yu, Y D Yao, Andreas Molisch, J Y Zhang

Research output: Contribution to journalArticlepeer-review

18 Citations (SciVal)

Abstract

Reverse link capacity of a direct-sequence code-division multiple-access (DS-CDMA) system in a multicell environment has been studied recently, and significant capacity improvements due to the use of beamforming have been observed. However, system performance with beamforming will be affected by several impairments, such as direction of arrival estimation errors, array perturbations, mutual coupling, and signal spatial spreads. In this paper, reverse link performance of CDMA systems with beamforming under these impairments (imperfect beamforming) is investigated. A simplified beamforming model is developed to evaluate the system performance in terms of user capacity, bit-error rates (BER), and outage probabilities. Both signal-to-interference-ratio-based power control and strength-based power control are considered in this paper. The capacity and BER degradations due to different impairments are shown, and outage probabilities under different power control schemes are examined.
Original languageEnglish
Pages (from-to)1019-1031
JournalIEEE Transactions on Vehicular Technology
Volume55
Issue number3
DOIs
Publication statusPublished - 2006

Subject classification (UKÄ)

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • mutual coupling
  • code-division multiple access (CDMA)
  • array perturbation
  • beamforming
  • power control
  • spatial spread
  • user capacity

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