INTERFERENCE REJECTION OF SIGNALS BY ADAPTIVE MINIMUM MEAN SQUARE ERROR CRITERION OVER RAYLEIGH FADING CHANNELS
Channel time-variation (or fading) is the major source of impairment in digital wireless communications. This occurs due to mobility of the user or of the objects in the propagation environment. The limited spectral bandwidth necessitates the use of resource sharing schemes between multiple users. A...
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| Format: | Article |
| Language: | English |
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Taylor's University
2009-03-01
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| Series: | Journal of Engineering Science and Technology |
| Subjects: | |
| Online Access: | http://jestec.taylors.edu.my/Vol%204%20Issue%201%20March%2009/Vol_4_1_99-110_Amita_Soni.pdf |
| _version_ | 1818981593240305664 |
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| author | AMITA SONI NEENA GUPTA |
| author_facet | AMITA SONI NEENA GUPTA |
| author_sort | AMITA SONI |
| collection | DOAJ |
| description | Channel time-variation (or fading) is the major source of impairment in digital wireless communications. This occurs due to mobility of the user or of the objects in the propagation environment. The limited spectral bandwidth necessitates the use of resource sharing schemes between multiple users. As the transmission medium is shared between the users, this leads to interference between the users. Sharing of resource results in interference such as multiple access interference. This paper deals with methods to study and mitigate such interference considering Rayleigh fading channels. There are various classes of fading conditions. The use of CDMA is under active research as a viable alternative to TDMA and FDMA. Performance in this system is limited by narrowband and multiple access interference. Various methods are used to mitigate them. But here, linear MMSE detector is considered. MMSE technique results in interference rejection. Its adaptive form is applied to Rayleigh fading channels, which are reflective and nondispersive. It results into better results than before. |
| first_indexed | 2024-12-20T17:33:47Z |
| format | Article |
| id | doaj.art-173204eb91ec4efcb576df128ce13bfb |
| institution | Directory Open Access Journal |
| issn | 1823-4690 |
| language | English |
| last_indexed | 2024-12-20T17:33:47Z |
| publishDate | 2009-03-01 |
| publisher | Taylor's University |
| record_format | Article |
| series | Journal of Engineering Science and Technology |
| spelling | doaj.art-173204eb91ec4efcb576df128ce13bfb2022-12-21T19:31:17ZengTaylor's UniversityJournal of Engineering Science and Technology1823-46902009-03-014199110INTERFERENCE REJECTION OF SIGNALS BY ADAPTIVE MINIMUM MEAN SQUARE ERROR CRITERION OVER RAYLEIGH FADING CHANNELSAMITA SONINEENA GUPTAChannel time-variation (or fading) is the major source of impairment in digital wireless communications. This occurs due to mobility of the user or of the objects in the propagation environment. The limited spectral bandwidth necessitates the use of resource sharing schemes between multiple users. As the transmission medium is shared between the users, this leads to interference between the users. Sharing of resource results in interference such as multiple access interference. This paper deals with methods to study and mitigate such interference considering Rayleigh fading channels. There are various classes of fading conditions. The use of CDMA is under active research as a viable alternative to TDMA and FDMA. Performance in this system is limited by narrowband and multiple access interference. Various methods are used to mitigate them. But here, linear MMSE detector is considered. MMSE technique results in interference rejection. Its adaptive form is applied to Rayleigh fading channels, which are reflective and nondispersive. It results into better results than before.http://jestec.taylors.edu.my/Vol%204%20Issue%201%20March%2009/Vol_4_1_99-110_Amita_Soni.pdfMMSE (Minimum mean square error)SIR (signal to interferenceratio)Rayleigh fading channelsCDMA (Code division multipleaccess)MAI (multiple access interference) |
| spellingShingle | AMITA SONI NEENA GUPTA INTERFERENCE REJECTION OF SIGNALS BY ADAPTIVE MINIMUM MEAN SQUARE ERROR CRITERION OVER RAYLEIGH FADING CHANNELS Journal of Engineering Science and Technology MMSE (Minimum mean square error) SIR (signal to interferenceratio) Rayleigh fading channels CDMA (Code division multipleaccess) MAI (multiple access interference) |
| title | INTERFERENCE REJECTION OF SIGNALS BY ADAPTIVE MINIMUM MEAN SQUARE ERROR CRITERION OVER RAYLEIGH FADING CHANNELS |
| title_full | INTERFERENCE REJECTION OF SIGNALS BY ADAPTIVE MINIMUM MEAN SQUARE ERROR CRITERION OVER RAYLEIGH FADING CHANNELS |
| title_fullStr | INTERFERENCE REJECTION OF SIGNALS BY ADAPTIVE MINIMUM MEAN SQUARE ERROR CRITERION OVER RAYLEIGH FADING CHANNELS |
| title_full_unstemmed | INTERFERENCE REJECTION OF SIGNALS BY ADAPTIVE MINIMUM MEAN SQUARE ERROR CRITERION OVER RAYLEIGH FADING CHANNELS |
| title_short | INTERFERENCE REJECTION OF SIGNALS BY ADAPTIVE MINIMUM MEAN SQUARE ERROR CRITERION OVER RAYLEIGH FADING CHANNELS |
| title_sort | interference rejection of signals by adaptive minimum mean square error criterion over rayleigh fading channels |
| topic | MMSE (Minimum mean square error) SIR (signal to interferenceratio) Rayleigh fading channels CDMA (Code division multipleaccess) MAI (multiple access interference) |
| url | http://jestec.taylors.edu.my/Vol%204%20Issue%201%20March%2009/Vol_4_1_99-110_Amita_Soni.pdf |
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