Reverse link capacity of SIR-based power-controlled CDMA systems with antenna arrays

Jin Yu Jin, Yu-Dong Yao

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

In this paper, reverse link capacity, in terms of user capacity, of a code-division multiple access (CDMA) system with both beamforming and antenna diversity under a multipath environment is analyzed and compared. Signal-to-interference ratio (SIR) based power control is assumed in the system. Antenna elements are divided into several groups to achieve antenna diversity gain. Antenna elements in a group are closely spaced to perform beamforming in order to suppress the own-cell and other-cell interference, while those groups are widely spaced to achieve the diversity gain. Based on the comparison, a most efficient use of the antenna array according to the distribution of antenna elements among the groups is obtained. Instead of using tedious iterative methods to evaluate user capacity, a simple closed-form capacity expression with respect to antenna diversity and beamforming gains, a target SIR and the CDMA processing gain is derived. Numerical results indicate significant capacity improvement with the antenna array.

Original languageEnglish (US)
Pages (from-to)759-772
Number of pages14
JournalWireless Communications and Mobile Computing
Volume3
Issue number6
DOIs
StatePublished - Sep 1 2003

Fingerprint

Antenna arrays
Code division multiple access
Antennas
Beamforming
Iterative methods
Power control
Processing

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Electrical and Electronic Engineering
  • Computer Networks and Communications

Cite this

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abstract = "In this paper, reverse link capacity, in terms of user capacity, of a code-division multiple access (CDMA) system with both beamforming and antenna diversity under a multipath environment is analyzed and compared. Signal-to-interference ratio (SIR) based power control is assumed in the system. Antenna elements are divided into several groups to achieve antenna diversity gain. Antenna elements in a group are closely spaced to perform beamforming in order to suppress the own-cell and other-cell interference, while those groups are widely spaced to achieve the diversity gain. Based on the comparison, a most efficient use of the antenna array according to the distribution of antenna elements among the groups is obtained. Instead of using tedious iterative methods to evaluate user capacity, a simple closed-form capacity expression with respect to antenna diversity and beamforming gains, a target SIR and the CDMA processing gain is derived. Numerical results indicate significant capacity improvement with the antenna array.",
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Reverse link capacity of SIR-based power-controlled CDMA systems with antenna arrays. / Yu Jin, Jin; Yao, Yu-Dong.

In: Wireless Communications and Mobile Computing, Vol. 3, No. 6, 01.09.2003, p. 759-772.

Research output: Contribution to journalArticle

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