Coding-Spreading Tradeoff for Lattice Codes

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dc.citation.bibtexNamemastersthesisen_US
dc.citation.journalTitleMasters Thesisen_US
dc.contributor.orgCenter for Multimedia Communications (http://cmc.rice.edu/)en_US
dc.creatorKhoshnevis, Ahmaden_US
dc.date.accessioned2007-10-31T00:49:22Zen_US
dc.date.available2007-10-31T00:49:22Zen_US
dc.date.issued2001-04-20en_US
dc.date.modified2003-07-12en_US
dc.date.submitted2001-09-20en_US
dc.descriptionMasters Thesisen_US
dc.description.abstractA fixed bandwidth expansion can be achieved either by coding or spreading, while each have different effect on the resultant signal space. Coding increases both Shannon and Fourier bandwidth whereas spreading only increases the Fourier bandwidth. In this document we are looking for the optimum combination of coding and spreading, in a Code Division Multiple Access (CDMA) system, that minimizes the average frame error rate under fading channel with multiple antennas at transmitter and receiver. Using the theory of lattice code, we show that in a system with K users, the optimum spreading factor N equals K. Simulation results support the analysis. In simulations we used Minimum Mean Square Error (MMSE), and Matched Filter (MF) as multi-user detector. We also assumed that receiver knows the Channel State Information (CSI). In case of multiple antennas Alamouti scheme at transmitter and Maximum Ratio Combining (MRC) at the receiver are applied.en_US
dc.identifier.citation "Coding-Spreading Tradeoff for Lattice Codes," <i>Masters Thesis,</i> 2001.en_US
dc.identifier.urihttps://hdl.handle.net/1911/20008en_US
dc.language.isoengen_US
dc.subjectlattice codesen_US
dc.subjectCDMAen_US
dc.subjectbandwidthen_US
dc.subject.keywordlattice codesen_US
dc.subject.keywordCDMAen_US
dc.subject.keywordbandwidthen_US
dc.titleCoding-Spreading Tradeoff for Lattice Codesen_US
dc.typeThesisen_US
dc.type.dcmiTexten_US
thesis.degree.levelMastersen_US
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