MISO CDMA transmission with simplified receiver for wireless communication handsets

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

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

The next-generation wireless personal and mobile communication systems are expected to accommodate not only high-quality voice services, but also a broad range of other multirate services. Of the various multiaccess techniques, wide-band code-division multiple access (CDMA) has been regarded as an important part of the third-generation wireless communication systems because of its high frequency utilization efficiency and suitability for handling multimedia and multirate services. In this paper, we consider a system with a simplified receiver structure for direct-sequence CDMA (DS/CDMA) wireless communication handsets, in which improved performance is demonstrated when compared to a conventional DS/CDMA system with a RAKE receiver at the mobile station. We arrive at this system by finding the optimal solution to a general multiple-input single-output (MISO) DS/CDMA smart antenna system. We find that this solution reduces to a pre-RAKE with space transmit diversity system under the assumption that a simple one-finger matched filter is used at the receiver. This system combines the advantages of pre-RAKE diversity and transmit antenna diversity. It is shown that significant system performance and capacity improvements are possible. The numerical results also reveal that this system is not too sensitive to channel estimation errors.

Original languageEnglish
Pages (from-to)888-898
Number of pages11
JournalIEEE Transactions on Communications
Volume49
Issue number5
DOIs
Publication statusPublished - May 2001
Externally publishedYes

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Keywords

  • DS/CDMA
  • RAKE receivers
  • Smart antennas
  • Transmit diversity
  • Wireless and mobile communications

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

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