Differentially-Encoded Turbo Coded Modulation with APP Channel Estimation

Sheryl Howard, Christian Schlegel

Research output: Contribution to conferencePaper

12 Scopus citations


A simple serially concatenated turbo code using differential 8PSK encoding as the inner code and a [3,2,2] parity code as the outer code is studied. This system is decoded according to turbo principles with iterative exchange of extrinsic probabilities, without differential demodulation. Results 0.6 dB from 8-PSK capacity are demonstrated for large interleaver size. Decoding over channels without prior synchronization is demonstrated to be feasible even with significant phase offset and phase noise, using a simple channel estimator that utilizes the extrinsic output symbol probabilities from the differential APP decoder.

Original languageEnglish (US)
Number of pages5
StatePublished - Dec 1 2003
Externally publishedYes
EventIEEE Global Telecommunications Conference GLOBECOM'03 - San Francisco, CA, United States
Duration: Dec 1 2003Dec 5 2003


OtherIEEE Global Telecommunications Conference GLOBECOM'03
CountryUnited States
CitySan Francisco, CA

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Global and Planetary Change

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    Howard, S., & Schlegel, C. (2003). Differentially-Encoded Turbo Coded Modulation with APP Channel Estimation. 1761-1765. Paper presented at IEEE Global Telecommunications Conference GLOBECOM'03, San Francisco, CA, United States.