Performance analysis of OFDM repeater networks with spatial fading correlation

Refik Caglar Kizilirmak, Yukitoshi Sanada

Research output: Contribution to journalArticle

Abstract

This paper analyzes the performance of the OFDM diversity systems with the spatial fading correlation when the network includes an RF repeater. In case of OFDM transmission, since the combining scheme is usually employed in the frequency domain, the correlation between different subchannels should be considered. In a multipath channel, correlation varies over subchannels depending on the channel delay profile and the spatial correlation between each individual delayed paths. In this study, a multipath channel is constructed by the repeated signal instead of natural multipath due to cluttered environments and the system performance with spatial correlation per subcarrier is evaluated. Previously, it is reported that the effect of correlation can be reduced by the Time Shifted Sampling (TSS) technique which relies on the multipath diversity. Numerical results indicate that the TSS technique is also effective in reducing the effect of correlation for the multipath channels constructed by the repeaters.

Original languageEnglish
Pages (from-to)573-582
Number of pages10
JournalWireless Personal Communications
Volume56
Issue number3
DOIs
Publication statusPublished - 2011 Feb 1

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Keywords

  • Amplify and forward
  • OFDM
  • Spatial fading correlation
  • Time Shifted Sampling
  • Wireless repeater

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering

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