A multi-levelled OFDM-CDMA modem using complete complementary codes

dc.contributor.authorMerensky, Alexander Mark
dc.contributor.authorVan Wyk, Jacques Herman
dc.contributor.authorLinde, Louis P.
dc.contributor.emailjacques.vanwyk@up.ac.zaen
dc.date.accessioned2012-12-06T08:21:57Z
dc.date.available2012-12-06T08:21:57Z
dc.date.issued2012
dc.description.abstractIn this paper, we introduce a novel multiple access scheme based on a combination of a multi-levelled modem and multi-carrier techniques with the use of complete complementary codes. This modulation technique combines a multi-dimensional code division multiple access (CDMA) modem with recent designs of perfectly complete complementary orthogonal codes. The rotational properties of the spreading codes are further exploited to improve the modulation technique, throughput, spectral efficiency, and capacity. Additionally, the system is extended by making use of multiple carrier frequencies as in OFDM, with the additional benefits of being able to spread data in frequency and/or in time. The modem offers multiple access interference MAI-free and multipath interference MI-free operation in both asynchronous and synchronous communication, due to perfect autocorrelation and zero cross-correlation properties of the spreading codes. The unique multi-levelled multiple access modulation technique together with the integration of complete complementary codes, produces a spectrally efficient output signal with high data throughput rates, better noise tolerances in harsh channel conditions and an increased user capacity.en
dc.description.librarianai2013
dc.description.sponsorshipThe Department of Trade and Industry (DTI), South Africaen
dc.description.urihttp://www.saiee.org.za//content.php?pageID=200#en
dc.identifier.citationMerensky, A, Van Wyk, J & Linde, LP 2012, 'A multi-levelled OFDM-CDMA modem using complete complementary codes', SAIEE Africa Research Journal, vol. 103, no. 2, pp. 94-102.en
dc.identifier.urihttp://hdl.handle.net/2263/20650
dc.language.isoenen
dc.publisherSouth African Institute of Electrical Engineersen
dc.rightsSouth African Institute of Electrical Engineersen
dc.subjectCDMAen
dc.subjectOFDMen
dc.subjectMulti-carrier modulationen
dc.subjectComplete complementary codesen
dc.subject.lcshCode division multiple accessen
dc.subject.lcshOrthogonal frequency division multiplexingen
dc.subject.lcshModulation (Electronics)en
dc.subject.lcshElectric interferenceen
dc.titleA multi-levelled OFDM-CDMA modem using complete complementary codesen
dc.typeArticleen

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