Variable step-size LMS adaptive filters for CDMA multiuser detection
Due to its simplicity the adaptive least mean square (LMS) algorithm is widely used in code-division multiple access (CDMA) detectors. However its convergence speed is highly dependent on the eigenvalue spread of the input covariance matrix. For highly correlated inputs the LMS algorithm has a slow...
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| creator | Egiazarian, K. Kuosmanen, P. Bilcu, R.C. |
| description | Due to its simplicity the adaptive least mean square (LMS) algorithm is widely used in code-division multiple access (CDMA) detectors. However its convergence speed is highly dependent on the eigenvalue spread of the input covariance matrix. For highly correlated inputs the LMS algorithm has a slow convergence which require long training sequences and therefore low transmission speeds. Another drawback of the LMS is the trade-off between convergence speed and steady-state error since both are controlled by the same parameter, the step-size. In order to eliminate these drawbacks, the class of variable step-size LMS (VSSLMS) algorithms was introduced. In this paper, we study the behavior of some algorithms belonging to the class of VSSLMS for training based multiuser detection in a CDMA system. We show that the proposed complementary pair variable step-size LMS algorithms highly increase the speed of convergence while reducing the trade-off between the convergence speed and the output error. |
| doi_str_mv | 10.1109/TELSKS.2003.1246226 |
| format | Conference Proceeding |
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We show that the proposed complementary pair variable step-size LMS algorithms highly increase the speed of convergence while reducing the trade-off between the convergence speed and the output error.</description><identifier>ISBN: 0780379632</identifier><identifier>ISBN: 9780780379633</identifier><identifier>DOI: 10.1109/TELSKS.2003.1246226</identifier><language>eng</language><publisher>IEEE</publisher><subject>Adaptive filters ; Convergence ; Covariance matrix ; Detectors ; Eigenvalues and eigenfunctions ; Error correction ; Least squares approximation ; Multiaccess communication ; Multiuser detection ; Steady-state</subject><ispartof>6th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service, 2003. 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TELSIKS 2003</title><addtitle>TELSKS</addtitle><description>Due to its simplicity the adaptive least mean square (LMS) algorithm is widely used in code-division multiple access (CDMA) detectors. However its convergence speed is highly dependent on the eigenvalue spread of the input covariance matrix. For highly correlated inputs the LMS algorithm has a slow convergence which require long training sequences and therefore low transmission speeds. Another drawback of the LMS is the trade-off between convergence speed and steady-state error since both are controlled by the same parameter, the step-size. In order to eliminate these drawbacks, the class of variable step-size LMS (VSSLMS) algorithms was introduced. In this paper, we study the behavior of some algorithms belonging to the class of VSSLMS for training based multiuser detection in a CDMA system. We show that the proposed complementary pair variable step-size LMS algorithms highly increase the speed of convergence while reducing the trade-off between the convergence speed and the output error.</description><subject>Adaptive filters</subject><subject>Convergence</subject><subject>Covariance matrix</subject><subject>Detectors</subject><subject>Eigenvalues and eigenfunctions</subject><subject>Error correction</subject><subject>Least squares approximation</subject><subject>Multiaccess communication</subject><subject>Multiuser detection</subject><subject>Steady-state</subject><isbn>0780379632</isbn><isbn>9780780379633</isbn><fulltext>true</fulltext><rsrctype>conference_proceeding</rsrctype><creationdate>2003</creationdate><recordtype>conference_proceeding</recordtype><sourceid>6IE</sourceid><sourceid>RIE</sourceid><recordid>eNotj81KAzEURgMiqLVP0E1eYOrNTSY_yzKtPzjFxVS3JTNzByJTOySpoE9vwX6bszoHPsYWApZCgHvYbermtVkigFwKVBpRX7E7MBakcVriDZun9AnnqVI67W7Z-sPH4NuReMo0FSn8Eq-3Dfe9n3L4Jj6EMVNMfDhGXq23K344jTmcEkXeU6Yuh-PXPbse_JhofuGMvT9udtVzUb89vVSrugiIkAuyukRwRiPZoe2k6qQDQmuQUAnd29brnoyzttQdCa9KI8UAZ8ujMh3JGVv8dwMR7acYDj7-7C9H5R9abEiP</recordid><startdate>2003</startdate><enddate>2003</enddate><creator>Egiazarian, K.</creator><creator>Kuosmanen, P.</creator><creator>Bilcu, R.C.</creator><general>IEEE</general><scope>6IE</scope><scope>6IL</scope><scope>CBEJK</scope><scope>RIE</scope><scope>RIL</scope></search><sort><creationdate>2003</creationdate><title>Variable step-size LMS adaptive filters for CDMA multiuser detection</title><author>Egiazarian, K. ; Kuosmanen, P. ; Bilcu, R.C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i220t-e865209762e8fbc34c390e2872e2416d8ba6de798856ce1a45731f0865a247ce3</frbrgroupid><rsrctype>conference_proceedings</rsrctype><prefilter>conference_proceedings</prefilter><language>eng</language><creationdate>2003</creationdate><topic>Adaptive filters</topic><topic>Convergence</topic><topic>Covariance matrix</topic><topic>Detectors</topic><topic>Eigenvalues and eigenfunctions</topic><topic>Error correction</topic><topic>Least squares approximation</topic><topic>Multiaccess communication</topic><topic>Multiuser detection</topic><topic>Steady-state</topic><toplevel>online_resources</toplevel><creatorcontrib>Egiazarian, K.</creatorcontrib><creatorcontrib>Kuosmanen, P.</creatorcontrib><creatorcontrib>Bilcu, R.C.</creatorcontrib><collection>IEEE Electronic Library (IEL) Conference Proceedings</collection><collection>IEEE Proceedings Order Plan All Online (POP All Online) 1998-present by volume</collection><collection>IEEE Xplore All Conference Proceedings</collection><collection>IEEE Electronic Library (IEL)</collection><collection>IEEE Proceedings Order Plans (POP All) 1998-Present</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Egiazarian, K.</au><au>Kuosmanen, P.</au><au>Bilcu, R.C.</au><format>book</format><genre>proceeding</genre><ristype>CONF</ristype><atitle>Variable step-size LMS adaptive filters for CDMA multiuser detection</atitle><btitle>6th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service, 2003. TELSIKS 2003</btitle><stitle>TELSKS</stitle><date>2003</date><risdate>2003</risdate><volume>1</volume><spage>259</spage><epage>264 vol.1</epage><pages>259-264 vol.1</pages><isbn>0780379632</isbn><isbn>9780780379633</isbn><abstract>Due to its simplicity the adaptive least mean square (LMS) algorithm is widely used in code-division multiple access (CDMA) detectors. However its convergence speed is highly dependent on the eigenvalue spread of the input covariance matrix. For highly correlated inputs the LMS algorithm has a slow convergence which require long training sequences and therefore low transmission speeds. Another drawback of the LMS is the trade-off between convergence speed and steady-state error since both are controlled by the same parameter, the step-size. In order to eliminate these drawbacks, the class of variable step-size LMS (VSSLMS) algorithms was introduced. In this paper, we study the behavior of some algorithms belonging to the class of VSSLMS for training based multiuser detection in a CDMA system. We show that the proposed complementary pair variable step-size LMS algorithms highly increase the speed of convergence while reducing the trade-off between the convergence speed and the output error.</abstract><pub>IEEE</pub><doi>10.1109/TELSKS.2003.1246226</doi><oa>free_for_read</oa></addata></record> |
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| identifier | ISBN: 0780379632 |
| ispartof | 6th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service, 2003. TELSIKS 2003, 2003, Vol.1, p.259-264 vol.1 |
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| language | eng |
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| source | IEEE Electronic Library (IEL) Conference Proceedings |
| subjects | Adaptive filters Convergence Covariance matrix Detectors Eigenvalues and eigenfunctions Error correction Least squares approximation Multiaccess communication Multiuser detection Steady-state |
| title | Variable step-size LMS adaptive filters for CDMA multiuser detection |
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