A low-complexity noncoherent iterative space-time demodulator

Ruey Yi Wei, Yu Wei Hsu, Chih Chong Pan

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Turbo coded unitary space-time modulation (USTM) can provide large coding gain as compared to uncoded USTM. Because the noncoherent space-time maximum a posteriori demodulator is very complicated, in this letter, we propose a new low-complexity noncoherent iterative space-time demodulator for the USTM constructed from pilot symbolassisted modulation. The proposed demodulator utilizes both hard and soft decisions from the turbo decoder to simplify the computational task as well as produce reliable soft outputs. Several examples demonstrate that this demodulator has both low complexity and good error performance.

Original languageEnglish
Pages (from-to)2895-2898
Number of pages4
JournalIEEE Transactions on Communications
Issue number10
StatePublished - 2009


  • Demodulator
  • Space-time code
  • Turbo code
  • Unitary space-time modulation


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