MIMO CDMA antenna system for SINR enhancement

Ruly Lai U Choi, Ross D. Murch, Khaled Letaief

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

In this paper, we present a system to enhance signal-to-interference plus noise ratio (SINR) for multiple-input-multiple-output (MIMO) direct-sequence code-division multiple-access (DS/CDMA) communications in the downlink for frequency-selective fading environments. The proposed system utilizes a transmit antenna array at the base station and a receive antenna array at the mobile station with finite-impulse response filters at both the transmitter and receiver. We arrive at our system by attempting to find the optimal solution to a general MIMO antenna system. A single user joint optimum scenario and a multiuser SINR enhancement scenario are derived. In addition, a simplified one-finger receiver structure is introduced. Numerical results reveal that significant system performance and capacity improvement over conventional approaches are possible. We also investigate the sensitivity of the proposed system to channel estimation errors.

Original languageEnglish
Pages (from-to)240-249
Number of pages10
JournalIEEE Transactions on Wireless Communications
Volume2
Issue number2
DOIs
Publication statusPublished - Mar 2003
Externally publishedYes

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Keywords

  • Direct-sequence code-division multiple-access (DS/CDMA)
  • Rake receivers
  • Receive antenna array
  • Smart antennas
  • Spatial temporal processing
  • Transmit antenna array
  • Wireless and mobile communications

ASJC Scopus subject areas

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

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