Exploiting error-control coding and cyclic-prefix in channel estimation for coded OFDM systems

Ghazi Al-Rawi*, Tareq Al-Naffouri, Ahmad Bahai, John Cioffi

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

6 Scopus citations


OFDM systems typically use coding and interleaving across subchannels to exploit frequency diversity on frequency-selective channels. This paper presents a low-complexity iterative algorithm for combined blind and semi-blind channel estimation and soft decoding in coded OFDM systems. Channel estimation is performed in the time domain using the expectation maximization (EM) algorithm to take advantage of the channel-length constraint and the extra observation offered by the cyclic-prefix. The proposed technique converges within a single OFDM symbol and, therefore, has a minimum latency and is suitable for fast time-varying channels.

Original languageEnglish (US)
Number of pages5
StatePublished - 2002
Externally publishedYes
EventGLOBECOM'02 - IEEE Global Telecommunications Conference - Taipei, Taiwan, Province of China
Duration: Nov 17 2002Nov 21 2002


OtherGLOBECOM'02 - IEEE Global Telecommunications Conference
Country/TerritoryTaiwan, Province of China

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Global and Planetary Change


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