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dc.contributor.advisorFattouche, Michael
dc.contributor.authorTan, Wenli
dc.date.accessioned2005-07-29T22:06:59Z
dc.date.available2005-07-29T22:06:59Z
dc.date.issued1995
dc.identifier.citationTan, W. (1995). A novel direct sequence spread spectrum wireless modem based on frequency shift keying (Unpublished master's thesis). University of Calgary, Calgary, AB. doi:10.11575/PRISM/19687en_US
dc.identifier.isbn0612043525en
dc.identifier.urihttp://hdl.handle.net/1880/29723
dc.descriptionBibliography: p. 102-105.en
dc.description.abstractA Direct Sequence Spread Spectrum (DSSS) wireless modem system based on Frequency Shift Keying (FSK) is introduced and studied in this thesis. The modem is designed to support data rates from as low as 1200 bps to as high as 100 kbps, which results in a variable-.modulation index for the FSK modulation. For the conventional frequency modulation system, the modulation index is kept small to achieve the best performance as well as the most efficient bandwidth usage. Using DSSS, the transmitted signal occupies a much wider bandwidth than the information signal. Therefore, bandwidth efficiency is not an issue for this system. However, a large modulation index may degrade the system performance. For the two post detectors considered, single sample detector and integrate­and-dump detector, the thesis demonstrates that the performance degradation from a large modulation index is significant for the single sample detector, but very small for the integrate-and-dump detector. The thesis also shows that the single sample detector provides a marginal processing gain, which does not change when the length of the Pseudonoise (PN) code increases. The integrate-and-dump detector produces a very good processing gain for the system. Performance degradation caused by the non-perfect PN code synchronization is also analyzed. This degradation is significant when intermittent tracking is employed. Better performance can be achieved by using continuous tracking, such as the tau-dither tracking scheme.
dc.format.extentxi, 105 leaves ; 30 cm.en
dc.language.isoeng
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subject.lccTK 7887.8 M63 T36 1995en
dc.subject.lcshModems
dc.subject.lcshSpread spectrum communications
dc.subject.lcshWireless communication systems
dc.subject.lcshModulation (Electronics)
dc.titleA novel direct sequence spread spectrum wireless modem based on frequency shift keying
dc.typemaster thesis
dc.publisher.institutionUniversity of Calgaryen
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/19687
thesis.degree.nameMaster of Science
thesis.degree.nameMS
thesis.degree.nameMSc
thesis.degree.disciplineElectrical and Computer Engineering
thesis.degree.grantorUniversity of Calgary
dc.identifier.lccTK 7887.8 M63 T36 1995en
dc.publisher.placeCalgaryen
ucalgary.thesis.notesoffsiteen
ucalgary.thesis.uarcreleaseyen
ucalgary.item.requestcopytrue
ucalgary.thesis.accessionTheses Collection 58.002:Box 1004 520538314


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University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.