A decision feedback decorrelator for a dual rate synchronous DS/CDMA system

Mohammad Saquib, Roy Yates, Narayan Mandayam

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


A dual rate synchronous DS/CDMA system provides service to low bit rate and high bit rate users. In a fixed duration interval, a low rate user transmits one bit while a high rate user transmits M bits. The differences in the bit transmission rates result in different processing gains for each class of user. In this paper, we propose a decision feedback decorrelator for the dual rate synchronous DS/CDMA system which uses modified correlators and initiates the bit decision process at the end of the high rate bit interval. Each step of the decision process is executed by utilizing the decisions of all previously decoded users. This dual rate decision feedback receiver (evaluated by simulation) is found to outperform two types of decorrelators for dual rate CDMA systems. It is also observed that as the interferers grow stronger relative to the desired user, the performance of the decision feedback receiver for decoding the desired user approaches the single user bound.

Original languageEnglish (US)
Pages (from-to)497-506
Number of pages10
JournalWireless Networks
Issue number6
StatePublished - 1998

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


Dive into the research topics of 'A decision feedback decorrelator for a dual rate synchronous DS/CDMA system'. Together they form a unique fingerprint.

Cite this