Adaptive MIMO transmission scheme: exploiting the spatial selectivity of wireless channels

A. Forenza, A. Pandharipande, Hojin Kim, R.W. Heath

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

40 Citations (Scopus)


We present a novel adaptive transmission technique for MIMO systems with the aim to enhancing the spectral efficiency for a target error rate performance and transmit power. This adaptive method employs the condition number of the spatial correlation matrix as an indicator of the spatial selectivity of the MIMO channel. The distribution of the condition number is then used to identify the prevailing channel environment. Depending on the identified channel state, our adaptive algorithm chooses the MIMO transmission method, among spatial multiplexing, D-STTD, and beamforming, which maximizes the spectral efficiency. Performance results show significant gains in throughput and reduced error rate compared to conventional fixed transmission schemes.
Original languageEnglish
Title of host publication2005 IEEE 61st Vehicular Technology Conference
PublisherInstitute of Electrical and Electronics Engineers
Number of pages5
ISBN (Print)0-7803-8887-9
Publication statusPublished - 5 Dec 2005
Externally publishedYes
Event61st Vehicular Technology Conference (VTC 2005-Spring) - Stockholm, Sweden, Stockholm, Sweden
Duration: 30 May 20051 Jun 2005
Conference number: 61


Conference61st Vehicular Technology Conference (VTC 2005-Spring)
Abbreviated titleVTC 2005-Spring


  • MIMO
  • Adaptive algorithm
  • Switches
  • Error analysis
  • Throughput
  • Wireless communication
  • Array signal processing
  • Robustness
  • Samarium
  • Diversity methods


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