Adaptive Kaiman Receiver for OFDM Systems with Transmit Diversity in Mobile Wireless Channels

Adnan Sen, Erdal Panayirci, Hakan A. Cirpan

Research output: Contribution to journalArticlepeer-review

Abstract

A new joint channel tracking and symbol detection scheme is proposed in this paper for pilot symbol assisted transmit diversity OFDM systems by exploiting the correlation of the adjacent subchannels. Modelling the channel frequency response of every subcarrier corresponding to each transmit antenna as random processes, we employ Kaiman filters for both channel tracking and subsequent decoding with diversity gain. Among different stochastic models, the AR model is adopted herein for channel dynamics. Since the proposed adaptive receiver uses two Kaiman filters to track the variations of the channel and subsequently to detect the information symbols, they are combined in the coupled receiver structure. Finally the performance of the proposed method is studied through experimental results.

Original languageEnglish
Pages (from-to)234-238
Number of pages5
JournalFrequenz
Volume58
Issue number11-12
DOIs
Publication statusPublished - 2004
Externally publishedYes

Keywords

  • channel tracking
  • diversity
  • Kaiman filter
  • OFDM

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