Spectral efficiency of equal-rate DS-CDMA systems with multiple transmit antennas

Husheng Li, H. Vincent Poor

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The spectral efficiency of equal-rate DS-CDMA systems with multiple transmit antennas is analyzed. Explicit expressions for the spectral efficiency are obtained in the low and high energy regions and numerical results are presented for the moderate energy region. The performance gains resulting from the use of multiple transmit antennas are discussed. An equation characterizing the diversity-multiplexing tradeoff in this situation is derived. A conclusion that adding more transmit antennas does not necessarily improve the performance with the constraint of equal rate is drawn.

Original languageEnglish (US)
Pages (from-to)3680-3688
Number of pages9
JournalIEEE Transactions on Wireless Communications
Volume5
Issue number12
DOIs
StatePublished - Dec 1 2006

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Keywords

  • Direct sequence code division multiple access (DS-CDMA)
  • Multiple-input multiple-output (MIMO)
  • Spectral efficiency

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