Improved SNR evolution for OFDM-IDMA systems

Jian Dang, Liuqing Yang, Zaichen Zhang

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


The bit error rate performance of interleave division multiple access (IDMA) based systems can be predicted by signal-to-noise ratio (SNR) evolution which tracks the average symbol SNR at each iteration and provides a faster solution than brute-force simulations. As the desired SNR in the evolution procedure is hard to obtain, approximate SNR updating formula has been widely adopted in the literature. In this paper a revised SNR updating formula is proposed for orthogonal frequency division multiplexing interleave division multiple access (OFDM-IDMA) systems in Rayleigh fading channels. Theoretical analysis shows that the new updating formula provides a tighter lower bound of the expected SNR in the evolution procedure compared with the existing one. We then verified this by simulations.

Original languageEnglish (US)
Article number6138264
Pages (from-to)65-68
Number of pages4
JournalIEEE Wireless Communications Letters
Issue number2
StatePublished - Apr 2012
Externally publishedYes


  • lower bound
  • SNR evolution

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