A unitary space-time modulation scheme with multistage decoding

Yu Lung Wu, Ruey Yi Wei

Research output: Contribution to journalArticlepeer-review


The complexity of maximum-likelihood (ML) decoding for unitary space-time modulation (USTM) is exponential in the code rate times symbol periods. In this letter, we propose a new USTM scheme which consists of USTMs with noncoherent multistage decoding. The decoding of the proposed scheme is less complex than ML decoding. We also find some good codes of the proposed scheme according to the design criterion. Simulation results indicate that our codes perform better than seamless USTMs over the quasistatic fading channels.

Original languageEnglish
Pages (from-to)1869-1872
Number of pages4
JournalIEICE Transactions on Communications
Issue number6
StatePublished - Jun 2006


  • Multistage decoding
  • Unitary space-time modulation


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