Near-capacity Turbo Trellis Coded Modulation design based on EXIT charts and union bounds - [Transactions papers]

Soon Xin Ng, Osamah Rashed Alamri, Yonghui Li, Jörg Kliewer, Lajos Hanzo

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


Bandwidth efficient parallel-concatenated Turbo Trellis Coded Modulation (TTCM) schemes were designed for communicating over uncorrelated Rayleigh fading channels. A symbol-based union bound was derived for analysing the error floor of the proposed TTCM schemes. A pair of In-phase (I) and Quadrature-phase (Q) interleavers were employed for interleaving the I and Q components of the TTCMcoded symbols, in order to attain an increased diversity gain. The decoding convergence of the IQ-TTCM schemes was analysed using symbol-based EXtrinsic Information Transfer (EXIT) charts. The best TTCM component codes were selected with the aid of both the symbolbased union bound and non-binary EXIT charts, for designing capacity-approaching IQ-TTCM schemes in the context of 8PSK, 16QAM, 32QAM and 64QAM modulation schemes.

Original languageEnglish (US)
Pages (from-to)2030-2039
Number of pages10
JournalIEEE Transactions on Communications
Issue number12
StatePublished - 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


  • Code design
  • Decoding convergence
  • Distance spectrum
  • EXIT charts
  • Turbo Trellis Coded Modulation
  • Union bound


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