Orthogonal codes for MAI-free MC-CDMA with Carrier Frequency Offsets (CFO)

Layla Tadjpour*, Shang-Ho Tsai, C. C.Jay Kuo

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

The performance of MC-CDMA in the presence of carrier frequency offsets (CFO) can be severely degraded due to multiaccess interference (MAI). It is shown in this work that a properly chosen subset of real Hadamard-Walsh or exponential codes can achieve zero MAI in a CFO environment. For a channel of length L and a number G of power of 2 with G ≥ L, we prove that I + log 2 (N/G) Hadamard-Walsh codewords or N/G exponential codewords can achieve zero MAI under any CFO level. Simulation results are given to corroborate derived theoretical results and evaluate the performance of MC-CDMA with a variable number of users in a CFO environment.

Original languageEnglish
Title of host publicationIEEE GLOBECOM 2006 - 2006 Global Telecommunications Conference
DOIs
StatePublished - 1 Dec 2006
EventIEEE GLOBECOM 2006 - 2006 Global Telecommunications Conference - San Francisco, CA, United States
Duration: 27 Nov 20061 Dec 2006

Publication series

NameGLOBECOM - IEEE Global Telecommunications Conference

Conference

ConferenceIEEE GLOBECOM 2006 - 2006 Global Telecommunications Conference
CountryUnited States
CitySan Francisco, CA
Period27/11/061/12/06

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