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Investigation into variable shift keying using direct sequence spread spectrum techniques
Includes bibliographical references.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Electrical Engineering
2014
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| _version_ | 1867613215521767424 |
|---|---|
| access_status_str | Open Access |
| author | Whaits, Clive Vivian |
| author2 | Braun, Robin |
| author_browse | Braun, Robin Whaits, Clive Vivian |
| author_facet | Braun, Robin Whaits, Clive Vivian |
| author_sort | Whaits, Clive Vivian |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/9565 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:36.207Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Electrical Engineering |
| publisherStr | Department of Electrical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/9565 Investigation into variable shift keying using direct sequence spread spectrum techniques Whaits, Clive Vivian Braun, Robin Applied Science Includes bibliographical references. This thesis reports the research done into a relatively unknown modulation scheme called VPSK (Variable Phase Shift Keying) and the use of DSSS (Direct Sequence Spread Spectrum) techniques to achieve carrier synchronization and hence coherent demodulation in the receiver. VPSK is a new and relatively unknown modulation scheme in which data bits are encoded using patented algorithms designed by Millerand Walker. VPSK modulation is a SSBSC (Single Sideband Suppressed Carrier) modulation scheme with good bandwidth efficiency. Data is coherently demodulated in the receiver. In existing VPSK systems, the locally generated carrier in the receiver is synchronized to an integer multiple of the symbol clock frequency to allow coherent demodulation. This coherent method of demodulation is not optimum if the channel over which information must be transmitted is a non-Gaussian channel, or has multi-path characteristics. 2014-11-11T20:07:35Z 2014-11-11T20:07:35Z 1997 Master Thesis Masters MSc http://hdl.handle.net/11427/9565 eng application/pdf Department of Electrical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Applied Science Whaits, Clive Vivian Investigation into variable shift keying using direct sequence spread spectrum techniques |
| thesis_degree_str | Master's |
| title | Investigation into variable shift keying using direct sequence spread spectrum techniques |
| title_full | Investigation into variable shift keying using direct sequence spread spectrum techniques |
| title_fullStr | Investigation into variable shift keying using direct sequence spread spectrum techniques |
| title_full_unstemmed | Investigation into variable shift keying using direct sequence spread spectrum techniques |
| title_short | Investigation into variable shift keying using direct sequence spread spectrum techniques |
| title_sort | investigation into variable shift keying using direct sequence spread spectrum techniques |
| topic | Applied Science |
| url | http://hdl.handle.net/11427/9565 |
| work_keys_str_mv | AT whaitsclivevivian investigationintovariableshiftkeyingusingdirectsequencespreadspectrumtechniques |