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


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
Issue number1
StatePublished - 1997

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Electrical and Electronic Engineering


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