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Multi-h synchronisation for codes with long constraints-length
Bibliography: p. 64.
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| Format: | Thesis |
| Language: | English |
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Department of Electrical Engineering
2014
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| _version_ | 1867613156014030848 |
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| access_status_str | Open Access |
| author | Nel, Eugéne Johannes |
| author2 | Braun, Robin |
| author_browse | Braun, Robin Nel, Eugéne Johannes |
| author_facet | Braun, Robin Nel, Eugéne Johannes |
| author_sort | Nel, Eugéne Johannes |
| collection | Thesis |
| description | Bibliography: p. 64. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/9471 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:31:38.662Z |
| 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:11427/9471 Multi-h synchronisation for codes with long constraints-length Nel, Eugéne Johannes Braun, Robin Electrical Engineering Bibliography: p. 64. This dissertation investigates the synchronisation of Multi-h signals with a long constraint length. However, Multi-h codes exhibiting a long constraint length invariably also exhibit a large denominator q. Since traditional methods for synchronising Multi-h signals utilises a q-th power law device, where the frequency spectrum of the qth power of the signal renders all the necessary frequencies for synchronisation, we suspect that a large q could be detrimental. When simulated, it turns out that the qth power law device fails to deliver distinct (and useable) frequency components at a q size of about 8. Unfortunately, the most useful codes have denominators starting at a size of q equals 32. This called for a novel approach to synchronisation. One device that shows much potential is the new Massey-Hodgart coherent MSK demodulator. In a significant departure from standard quadrature structures, this MSK demodulator uses matched filter detection with a pair of reference signals at the two MSK signaling frequencies; an optimal maximum-likelihood bit decision is then formed over two bit intervals. The reference signals are recovered by a pair of decision-switched Costas loops, which are tightly integrated with the demodulator structure. The goal was to modify the Massey-Hodgart MSK demodulator into a Multi-h synchroniser that contained matched filter detection for all the frequencies in the Multi-h signal. The reference frequencies would still be decision switched and recovered by Costas loops. 2014-11-10T08:54:52Z 2014-11-10T08:54:52Z 1997 Master Thesis Masters MSc http://hdl.handle.net/11427/9471 eng application/pdf Department of Electrical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Electrical Engineering Nel, Eugéne Johannes Multi-h synchronisation for codes with long constraints-length |
| thesis_degree_str | Master's |
| title | Multi-h synchronisation for codes with long constraints-length |
| title_full | Multi-h synchronisation for codes with long constraints-length |
| title_fullStr | Multi-h synchronisation for codes with long constraints-length |
| title_full_unstemmed | Multi-h synchronisation for codes with long constraints-length |
| title_short | Multi-h synchronisation for codes with long constraints-length |
| title_sort | multi h synchronisation for codes with long constraints length |
| topic | Electrical Engineering |
| url | http://hdl.handle.net/11427/9471 |
| work_keys_str_mv | AT neleugenejohannes multihsynchronisationforcodeswithlongconstraintslength |