On joint source-channel decoding and interference cancellation in CDMA-based large-scale wireless sensor networks

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dc.contributor.authorIllangakoon, Chathura
dc.contributor.examiningcommitteeHossain, Ekram (Electrical and Computer Engineering) Irani, Pourang (Computer Science)en_US
dc.contributor.supervisorYahampath, Pradeepa (Electrical and Computer Engineering)en_US
dc.date.accessioned2013-08-02T18:51:18Z
dc.date.available2013-08-02T18:51:18Z
dc.date.issued2013-05-26en_US
dc.degree.disciplineElectrical and Computer Engineeringen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractMotivated by potential applications in wireless sensor networks, this thesis considers the problem of communicating a large number of correlated analog sources over a Gaussian multiple-access channel using non-orthogonal code-division multiple-access (CDMA). A joint source-channel decoder is presented which can exploit the inter-source correlation for interference reduction in the CDMA channel. This decoder uses a linear minimum mean square error (MMSE) multi-user detector (MUD) in tandem with a MMSE joint source decoder (JSD) for multiple sources to achieve a computational complexity that scales with the number of sources. The MUD and the JSD, then iteratively exchange extrinsic information to improve the interference cancellation. Experimental results show that, compared to a non-iterative decoder, the proposed iterative decoder is more robust against potential performance degradation due to correlated channel interference and offers better near far resistance.en_US
dc.description.noteOctober 2013en_US
dc.identifier.citationC. Illangakoon and P. Yahampath, “On joint source-channel decoding and interference cancellation in CDMA-based large-scale wireless sensor networks,” IEEE International Conference on Acoustics, Speech and Signal Processing, 2013. ICASSP 2013.en_US
dc.identifier.urihttp://hdl.handle.net/1993/22019
dc.language.isoengen_US
dc.publisherIEEEen_US
dc.rightsopen accessen_US
dc.subjectMulti-user source codingen_US
dc.subjectjoint source-channel decodingen_US
dc.subjectiterative decodingen_US
dc.subjectCDMAen_US
dc.subjectmulti-user detectionen_US
dc.titleOn joint source-channel decoding and interference cancellation in CDMA-based large-scale wireless sensor networksen_US
dc.typemaster thesisen_US
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