A new look at digital orthogonal transmultiplexers for cdma communications

Ali N. Akansu, M. V. Tazebay, Richard A. Haddad

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Orthogonal transmultiplexers have been successfully utilized for multiuser communications. They are of the FDMA type in their most common version. The transmultiplexers using frequency selective PR-QMF's as their user codes were reported in the literature. This approach conflicts with the requirements of a CDMA communications system. We introduce novel spread spectrum PR-QMF codes in this correspondence, wherein the orthogonality is distributed over both time and frequency domains. It is shown that the proposed multivalued spread spectrum PR-QMF codes with minimized auto and cross-correlation properties outperform the conventional binary Gold codes in CDMA communication scenarios considered in the correspondence.

Original languageEnglish (US)
Pages (from-to)263-267
Number of pages5
JournalIEEE Transactions on Signal Processing
Volume45
Issue number1
DOIs
StatePublished - Dec 1 1997

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Electrical and Electronic Engineering

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