Turbo equalization using partial Gaussian approximation

C. Zhang, Z. Wang, C.N. Manchon, P. Sun, Qinghua Guo, B.H. Fleury

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)


    © 1994-2012 IEEE.
    This letter deals with turbo equalization for coded data transmission over intersymbol interference (ISI) channels. We propose a message-passing algorithm that uses the expectation propagation rule to convert messages passed from the demodulator and decoder to the equalizer and computes messages returned by the equalizer by using a partial Gaussian approximation (PGA). We exploit the specific structure of the ISI channel model to compute the latter messages from the beliefs obtained using a Kalman smoother/equalizer. Doing so leads to a significant complexity reduction compared to the initial PGA implementation. Results from Monte Carlo simulations show that the proposed approach leads to a significant performance improvement compared to state-of-the-art turbo equalizers and allows for trading performance with complexity.
    Original languageEnglish
    Pages (from-to)1216-1220
    JournalIEEE Signal Processing Letters
    Issue number9
    Early online date16 Jun 2016
    Publication statusPublished - Sep 2016


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