Blind detection of PAM and QAM in fading channels

Daniel J. Ryan*, I. Vaughan L Clarkson, Iain B. Collings

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


This correspondence considers block detection for blind wireless digital transmission. At high signal-to-noisc ratio (SNR), block detection errors are primarily due to the received sequence having multiple possible decoded sequences with the same likelihood. We derive analytic expressions for the probability of detection ambiguity written in terms of a Dedckind zeta function, in the zero noise case with large constellations. Expressions are also provided for finite constellations, which can be evaluated efficiently, independent of the block length. Simulations demonstrate that the analytically derived error floors exist at high SNR.

Original languageEnglish
Pages (from-to)1197-1206
Number of pages10
JournalIEEE Transactions on Information Theory
Issue number3
Publication statusPublished - Mar 2006
Externally publishedYes


  • Blind detection
  • Block detection
  • Error floor
  • Fading
  • Noncoherent communication
  • Number theory
  • Sequence detection
  • Wireless communications


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