Transmit Diversity over Quasi-Static Fading Channels Using Multiple Antennas and Random Signal Mapping

Yingxue Li, Costas N. Georghiades, Garng Morton Huang

Research output: Contribution to journalArticle

16 Citations (Scopus)


We introduce a scheme that achieves a diversity gain for coded systems under static fading conditions by using multiple antennas and random signal mapping. In a two-antenna system, the bit-error rate performance of the proposed scheme approaches that of Alamouti's scheme when the channel is perfectly known. In the presence of channel mismatch, the proposed scheme outperforms Alamouti's scheme significantly. It is shown that as the number of transmit antennas N goes to infinity, the effective channel for the introduced scheme behaves as if it were perfectly interleaved (i.e., as if the fading was independent). When N is small, further performance gain can be achieved by expanding the original signal constellation.

Original languageEnglish
Pages (from-to)1918-1926
Number of pages9
JournalIEEE Transactions on Communications
Issue number11
Publication statusPublished - 1 Nov 2003
Externally publishedYes



  • Coding
  • Multiple-input multiple-output (MIMO) channels
  • Performance
  • Signal mapping
  • Transmit diversity

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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