A new VSL scheme for multi-rate DS-CDMA systems

Yingwei Yao, H. Vincent Poor

Research output: Contribution to journalConference articlepeer-review


This paper considers multiuser detection in variable-spreading-length (VSL) multi-rate direct-sequence code division multiple access (DS-CDMA) systems. In such systems, linear multiuser receivers for users transmitting at data rates higher than the basic rate in general need to be time-varying. This makes the adaptive implementation of these receivers difficult. Here, a two-layer spreading code scheme is proposed which facilitates the low complexity adaptive implementation of linear MMSE multiuser receivers in a dual-rate system. Extension of this scheme to more general multi-rate systems is straightforward. It is demonstrated via analysis and simulation results that this scheme achieves good performance.

Original languageEnglish (US)
Pages (from-to)1369-1373
Number of pages5
JournalIEEE Vehicular Technology Conference
Issue number3
StatePublished - 2002
Event56th Vehicular Technology Conference - Vancouver, BC, Canada
Duration: Sep 24 2002Sep 28 2002

All Science Journal Classification (ASJC) codes

  • Applied Mathematics
  • Electrical and Electronic Engineering
  • Computer Science Applications


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