A modified constrained constant modulus approach to blind adaptive multiuser detection
An alternative blind adaptive multiuser detection is investigated based on modified constrained constant modulus (CM) criterion. It is shown that the performance of a CM-based receiver is limited by the received power of the desired user. In this paper, we show that the limitation can be avoided usi...
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| Veröffentlicht in: | IEEE transactions on communications 2001-09, Vol.49 (9), p.1642-1648 |
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| container_title | IEEE transactions on communications |
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| creator | Xu, Changjiang Feng, Guangzeng Kwak, Kyung Sup |
| description | An alternative blind adaptive multiuser detection is investigated based on modified constrained constant modulus (CM) criterion. It is shown that the performance of a CM-based receiver is limited by the received power of the desired user. In this paper, we show that the limitation can be avoided using the noncanonical constraint CM criterion and that in the presence of channel noise the modified CM criterion function is strictly convex by properly selecting some constant. With analyzing the extrema of the cost function, we point out how to select the constant. Moreover, a simple stochastic gradient algorithm for implementing our scheme is presented, and the convergence properties of the algorithm are analyzed. Simulation examples are given to demonstrate the performance of the proposed scheme. |
| doi_str_mv | 10.1109/26.950350 |
| format | Article |
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Simulation examples are given to demonstrate the performance of the proposed scheme.</description><identifier>ISSN: 0090-6778</identifier><identifier>EISSN: 1558-0857</identifier><identifier>DOI: 10.1109/26.950350</identifier><identifier>CODEN: IECMBT</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Algorithm design and analysis ; Algorithms ; Blind equalizers ; Blinds ; Channel noise ; Computer simulation ; Constraints ; Convergence ; Cost function ; Criteria ; Intersymbol interference ; Multiaccess communication ; Multiple access interference ; Multiuser detection ; Receivers ; Stochastic processes ; Stochastic resonance ; Timing</subject><ispartof>IEEE transactions on communications, 2001-09, Vol.49 (9), p.1642-1648</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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Simulation examples are given to demonstrate the performance of the proposed scheme.</description><subject>Algorithm design and analysis</subject><subject>Algorithms</subject><subject>Blind equalizers</subject><subject>Blinds</subject><subject>Channel noise</subject><subject>Computer simulation</subject><subject>Constraints</subject><subject>Convergence</subject><subject>Cost function</subject><subject>Criteria</subject><subject>Intersymbol interference</subject><subject>Multiaccess communication</subject><subject>Multiple access interference</subject><subject>Multiuser detection</subject><subject>Receivers</subject><subject>Stochastic processes</subject><subject>Stochastic resonance</subject><subject>Timing</subject><issn>0090-6778</issn><issn>1558-0857</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2001</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNqN0TtLBDEUBeAgCq6rha3VYKFYzHon2bxKWXzBgo3aDpk8MMu8nGQE_71ZZrWwEKsE7sfhJBeh0wIWRQHyGrOFpEAo7KFZQanIQVC-j2YAEnLGuThERyFsAGAJhMzQ603WdMY7b02muzbEQfn2-67auJ2O9Rgy1fdDp_RbFrusqn1rMmVUH_2HzZqxjn4MdsiMjVZH37XH6MCpOtiT3TlHL3e3z6uHfP10_7i6WeeaMB5zyjnHrsLaYUK0c1gK7GTlRKorKMPYOAuyUNqwShOojHTEMlNVjFJgFsgcXU65qdz7aEMsGx-0rWvV2m4MpSyWjEoul0le_CmxSJ8mxD8g4zJ1kgme_4Kbbhza9Nwy5QjAFG_Triakhy6EwbqyH3yjhs-ygHK7sZRXThtL9myy3lr743bDL_XpkLI</recordid><startdate>20010901</startdate><enddate>20010901</enddate><creator>Xu, Changjiang</creator><creator>Feng, Guangzeng</creator><creator>Kwak, Kyung Sup</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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It is shown that the performance of a CM-based receiver is limited by the received power of the desired user. In this paper, we show that the limitation can be avoided using the noncanonical constraint CM criterion and that in the presence of channel noise the modified CM criterion function is strictly convex by properly selecting some constant. With analyzing the extrema of the cost function, we point out how to select the constant. Moreover, a simple stochastic gradient algorithm for implementing our scheme is presented, and the convergence properties of the algorithm are analyzed. Simulation examples are given to demonstrate the performance of the proposed scheme.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/26.950350</doi><tpages>7</tpages></addata></record> |
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| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Algorithm design and analysis Algorithms Blind equalizers Blinds Channel noise Computer simulation Constraints Convergence Cost function Criteria Intersymbol interference Multiaccess communication Multiple access interference Multiuser detection Receivers Stochastic processes Stochastic resonance Timing |
| title | A modified constrained constant modulus approach to blind adaptive multiuser detection |
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