Influence of code orthogonality on downlink throughput comparison between MC-CDMA and OFDMA in multi-cellular environments

Anas F. Alrawi, Bayan S. Sharif, Charalampos C. Tsimenidis, Konstantinos Ntagkounakis

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

3 Scopus citations

Abstract

Fourth generation (4G) mobile access is drawing particular attention as it promises to deliver high data rates and reliable coverage for broadband wireless access. In this paper, Orthogonal Frequency Division Multiplexing Access (OFDMA) and Multi-Carrier Code Division Multiplexing Access (MC-CDMA) are investigated to highlight their strengths and weaknesses as candidates for 4G wireless access. Using a multi-cell environment, MC-CDMA and OFDMA coverage is dimensioned based on the value of the Signal to Interference plus Noise Ratio (SINR). The results show that OFDMA system offers cell coverage of 92.5 %and a maximum actual throughput of 24.2 Mbps/cell (fade margin 10 dB). Using the same assumptions for MC-CDMA, the results show better coverage only with complete orthogonal spreading codes which can guarantee 97 % of user coverage and actual throughput of 28.8 Mbps. These measurements decrease as the orthogonality between the spreading codes is reduced. In the case of 94 % orthogonality the MC-CDMA system achieved 89.3 % coverage and 21.9 Mbps throughput while with a 60 % orthogonality 47 % coverage and 5.8 Mbps throughput was achieved.

Original languageBritish English
Title of host publicationIEEE Symposium on Computers and Communications 2009, ISCC 2009
Pages249-254
Number of pages6
DOIs
StatePublished - 2009
EventIEEE Symposium on Computers and Communications 2009, ISCC 2009 - Sousse, Tunisia
Duration: 5 Jul 20098 Jul 2009

Publication series

NameProceedings - IEEE Symposium on Computers and Communications
ISSN (Print)1530-1346

Conference

ConferenceIEEE Symposium on Computers and Communications 2009, ISCC 2009
Country/TerritoryTunisia
CitySousse
Period5/07/098/07/09

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