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Design of a forward error correction algorithm for a satellite modem
Thesis (MScEng)--University of Stellenbosch, 2001.
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| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2012
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| _version_ | 1867613939778453504 |
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| access_status_str | Open Access |
| author | Sefara, Mamphoko Nelly |
| author2 | Lourens, J. G. |
| author_browse | Lourens, J. G. Sefara, Mamphoko Nelly |
| author_facet | Lourens, J. G. Sefara, Mamphoko Nelly |
| author_sort | Sefara, Mamphoko Nelly |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MScEng)--University of Stellenbosch, 2001. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/52181 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:44:06.995Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/52181 Design of a forward error correction algorithm for a satellite modem Sefara, Mamphoko Nelly Lourens, J. G. Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. SUNSAT Image compression Data compression (Telecommunication) Image processing -- Digital techniques Dissertations -- Electronic engineering Theses -- Electronic engineering Thesis (MScEng)--University of Stellenbosch, 2001. ENGLISH ABSTRACT: One of the problems with any deep space communication system is that information may be altered or lost during transmission due to channel noise. It is known that any damage to the bit stream may lead to objectionable visual quality distortion of images at the decoder. The purpose of this thesis is to design an error correction and data compression algorithm for image protection, which will allow the communication bandwidth to be better utilized. The work focuses on Sunsat (Stellenbosch Satellite) images as test images. Investigations were done on the JPEG 2000 compression algorithm's robustness to random errors, putting more emphasis on how much of the image is degraded after compression. Implementation of both the error control coding and data compression strategy is then applied to a set of test images. The FEe algorithm combats some if not all of the simulated random errors introduced by the channel. The results illustrates that the error correction of random errors is achieved by a factor of 100 times (xl00) on all test images and that the probability of error of 10-2in the channel (10-4for image data) shows that the errors causes little degradation on the image quality. AFRIKAANSE OPSOMMING: Een van die probleme met kommunikasie in die ruimte is dat informasie mag verlore gaan en! of gekorrupteer word deur ruis gedurende versending deur die kanaal. Dit is bekend dat enige skade aan die bisstroom mag lei tot hinderlike vervorming van die beelde wat op aarde ontvang word. Die doel van hierdie tesis om foutkorreksie en datakompressie te ontwikkel wat die satelliet beelde sal beskerm gedurende versending en die kommunikasie kanaal se bandwydte beter sal benut. Die werk fokus op SUNSAT (Stellenbosch Universiteit Satelliet) se beelde as toetsbeelde. Ondersoeke is gedoen na die JPEG2000 kompressie algoritme se bestandheid teen toevalsfoute, met klem op hoeveel die beeld gedegradeer word deur die bisfoute wat voorkom. Beide die kompressie en die foutkorreksie is ge-implementeer en aangewend op die toetsbeelde. Die foutkorreksie bestry die gesimuleerde toevalsfoute, soos wat dit op die kanaal voorkom. Die resultate toon dat die foutkorreksie die toevalsfoute met 'n faktor 100 verminder, en dat 'n foutwaarskynlikheid van 10-2 op die kanaal (10-4 op die beelddata) weinig degradering in die beeldkwaliteit veroorsaak. 2012-08-27T11:34:53Z 2012-08-27T11:34:53Z 2001-12 Thesis http://hdl.handle.net/10019.1/52181 en_ZA Stellenbosch University 107 p. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | SUNSAT Image compression Data compression (Telecommunication) Image processing -- Digital techniques Dissertations -- Electronic engineering Theses -- Electronic engineering Sefara, Mamphoko Nelly Design of a forward error correction algorithm for a satellite modem |
| title | Design of a forward error correction algorithm for a satellite modem |
| title_full | Design of a forward error correction algorithm for a satellite modem |
| title_fullStr | Design of a forward error correction algorithm for a satellite modem |
| title_full_unstemmed | Design of a forward error correction algorithm for a satellite modem |
| title_short | Design of a forward error correction algorithm for a satellite modem |
| title_sort | design of a forward error correction algorithm for a satellite modem |
| topic | SUNSAT Image compression Data compression (Telecommunication) Image processing -- Digital techniques Dissertations -- Electronic engineering Theses -- Electronic engineering |
| url | http://hdl.handle.net/10019.1/52181 |
| work_keys_str_mv | AT sefaramamphokonelly designofaforwarderrorcorrectionalgorithmforasatellitemodem |