Stability analysis of the turbo decoding algorithm using Max-Log-MAP

Wei Sheng Wu, Chung Hsuan Wang, Mao Ching Chiu, Chi Chao Chao

Research output: Contribution to journalConference articlepeer-review


In this paper we investigate analytically the convergence properties of the iterative turbo decoding with the Max-Log-MAP algorithm for softoutput generation. With respect to the iterative decoding scheme, several equivalent mathematical formulations are derived to facilitate the stability analysis, based on which we show that turbo decoding with Max-Log-MAP has at least one fixed point but is in general suboptimal and may not even converge. Finally, some conditions are given to guarantee the convergence of the iterative turbo decoding.

Original languageEnglish
Number of pages1
JournalIEEE International Symposium on Information Theory - Proceedings
Publication statusPublished - 2002 Sept 12
Event2002 IEEE International Symposium on Information Theory - Lausanne, Switzerland
Duration: 2002 Jun 302002 Jul 5

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • Information Systems
  • Modelling and Simulation
  • Applied Mathematics


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