A two-layer spreading code scheme for dual-rate DS-CDMA systems

Yingwei Yao, H. Vincent Poor

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


This letter considers multiuser detection in variable-spreading-length multi-rate direct-sequence code-division multiple-access systems. A two-layer spreading (TLS) code scheme is proposed which facilitates the low-complexity adaptive implementation of linear minimum mean-square error multiuser receivers in a dual-rate system. It is demonstrated via large system analysis and simulation that imposing a TLS structure does not incur loss in terms of the output signal-to-interference ratio performance.

Original languageEnglish (US)
Pages (from-to)873-879
Number of pages7
JournalIEEE Transactions on Communications
Issue number6
StatePublished - Jun 2003

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


  • Adaptive receiver
  • Direct-sequence code-division multiple-access (DS-CDMA) systems
  • Linear minimum mean-square error (MMSE) receiver
  • Multirate systems
  • Multiuser detection


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