Combined Coding and Spread Spectrum Modulatin in Wideband Code Division Multiple Access Communication Systems
In this paper, we introduce two techniques, recently proposed in (1-2], for combination of coding and spread spectrum modulation in wideband Code Division Multiple Access (CDMA) systems. These coding schemes, named as an internal coding, do not require extra bandwidth further than what is needed for...
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| Format: | Article |
| Language: | English |
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Iran Telecom Research Center
2009-06-01
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| Series: | International Journal of Information and Communication Technology Research |
| Subjects: | |
| Online Access: | http://ijict.itrc.ac.ir/article-1-294-en.html |
| _version_ | 1811169284541382656 |
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| author | Masoumeh Nasiri Kenari |
| author_facet | Masoumeh Nasiri Kenari |
| author_sort | Masoumeh Nasiri Kenari |
| collection | DOAJ |
| description | In this paper, we introduce two techniques, recently proposed in (1-2], for combination of coding and spread
spectrum modulation in wideband Code Division Multiple Access (CDMA) systems. These coding schemes, named as an internal coding, do not require extra bandwidth further than what is needed for a conventional uncoded spread spectrum system. They have been applied to both radio and optical ultra wideband code division multiple access communication systems. Their performance based on both analytical analysis and simulation for various radio and optical applications, and for a variety of single user and multiuser receivers, has been investigated. The results indicate that the internal coded schemes substantially outperform the conventional uncoded scheme, for the same transmitter powers and spectral efficiencies. Also, the various methods for providing multi services and multi rates for the internally coded systems have been introduced and their performance bas been investigated. |
| first_indexed | 2024-04-10T16:40:53Z |
| format | Article |
| id | doaj.art-361016ee2a9b4aabba270c53cb40a2e7 |
| institution | Directory Open Access Journal |
| issn | 2251-6107 2783-4425 |
| language | English |
| last_indexed | 2024-04-10T16:40:53Z |
| publishDate | 2009-06-01 |
| publisher | Iran Telecom Research Center |
| record_format | Article |
| series | International Journal of Information and Communication Technology Research |
| spelling | doaj.art-361016ee2a9b4aabba270c53cb40a2e72023-02-08T07:28:55ZengIran Telecom Research CenterInternational Journal of Information and Communication Technology Research2251-61072783-44252009-06-01122938Combined Coding and Spread Spectrum Modulatin in Wideband Code Division Multiple Access Communication SystemsMasoumeh Nasiri Kenari0 Department of Electrical Engineering Sharif University of Technology,Tehran,Iran In this paper, we introduce two techniques, recently proposed in (1-2], for combination of coding and spread spectrum modulation in wideband Code Division Multiple Access (CDMA) systems. These coding schemes, named as an internal coding, do not require extra bandwidth further than what is needed for a conventional uncoded spread spectrum system. They have been applied to both radio and optical ultra wideband code division multiple access communication systems. Their performance based on both analytical analysis and simulation for various radio and optical applications, and for a variety of single user and multiuser receivers, has been investigated. The results indicate that the internal coded schemes substantially outperform the conventional uncoded scheme, for the same transmitter powers and spectral efficiencies. Also, the various methods for providing multi services and multi rates for the internally coded systems have been introduced and their performance bas been investigated.http://ijict.itrc.ac.ir/article-1-294-en.htmlcoding and spread spectrum modulationwideband code division multiple access (cdma) systemsinternal codingconventional uncoded spread spectrum systemoptical ultra wideband code division |
| spellingShingle | Masoumeh Nasiri Kenari Combined Coding and Spread Spectrum Modulatin in Wideband Code Division Multiple Access Communication Systems International Journal of Information and Communication Technology Research coding and spread spectrum modulation wideband code division multiple access (cdma) systems internal coding conventional uncoded spread spectrum system optical ultra wideband code division |
| title | Combined Coding and Spread Spectrum Modulatin in Wideband Code Division Multiple Access Communication Systems |
| title_full | Combined Coding and Spread Spectrum Modulatin in Wideband Code Division Multiple Access Communication Systems |
| title_fullStr | Combined Coding and Spread Spectrum Modulatin in Wideband Code Division Multiple Access Communication Systems |
| title_full_unstemmed | Combined Coding and Spread Spectrum Modulatin in Wideband Code Division Multiple Access Communication Systems |
| title_short | Combined Coding and Spread Spectrum Modulatin in Wideband Code Division Multiple Access Communication Systems |
| title_sort | combined coding and spread spectrum modulatin in wideband code division multiple access communication systems |
| topic | coding and spread spectrum modulation wideband code division multiple access (cdma) systems internal coding conventional uncoded spread spectrum system optical ultra wideband code division |
| url | http://ijict.itrc.ac.ir/article-1-294-en.html |
| work_keys_str_mv | AT masoumehnasirikenari combinedcodingandspreadspectrummodulatininwidebandcodedivisionmultipleaccesscommunicationsystems |