Joint channel parameter estimation and signal detection for downlink MIMO DS-CDMA systems

Yung Yi Wang*, Jiunn Tsair Chen, L. U. Ying

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review


This paper proposes two space-time joint channel parameter estimation and signal detection algorithms for downlink DS-CDMA systems with multiple-input-multiple-output (MIMO) wireless multipath fading channels. The proposed algorithms initially use the space-time MUSIC to estimate the DOA-delays of the multipath channel. Based on these estimated DOA-delays, a space-time channel decoupler is developed to decompose the multipath downlink channel into a set of independent parallel subchannels. The fading amplitudes of the multipath can then be estimated from the eigen space of the output of the space-time channel decoupler. With these estimated channel parameters, signal detection is carried out by a maximal ratio combiner on a pathwise basis. Computer simulations show that the proposed algorithms outperform the conventional space-time RAKE receiver while having the similar performance compared with the space-time minimum mean square error receiver.

Original languageEnglish
Pages (from-to)4229-4235
Number of pages7
JournalIEICE Transactions on Communications
Issue number11
StatePublished - 11 2005
Externally publishedYes


  • Downlink channels
  • MIMO
  • Signal detection
  • Software radio


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