An optimized transmitter precoding scheme for synchronous DS-CDMA
A technique is presented to reduce the multiple-access interference in the forward link of a direct-sequence code-division multiple-access system. For each symbol period, an energy-constrained nonlinear transformation is applied at the transmitter output to minimize the mean-squared error at the rec...
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| Veröffentlicht in: | IEEE transactions on communications 2006-01, Vol.54 (1), p.32-36 |
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| container_title | IEEE transactions on communications |
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| creator | Hons, E.S. Khandani, A.K. Tong, W. |
| description | A technique is presented to reduce the multiple-access interference in the forward link of a direct-sequence code-division multiple-access system. For each symbol period, an energy-constrained nonlinear transformation is applied at the transmitter output to minimize the mean-squared error at the receiver, subject to a constraint on the peak transmitted energy. The proposed algorithm can be implemented with existing optimization techniques that solve the quadratic trust-region problem. It is shown that in the presence of forward error-correction codes, the proposed method results in a significant gain over earlier known techniques at the cost of a modest increase in computational complexity at the base station. Another advantage of the proposed precoder is that it caps the peak energy (while earlier methods cap the average energy), requiring less sophisticated power amplifiers. |
| doi_str_mv | 10.1109/TCOMM.2005.861691 |
| format | Article |
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For each symbol period, an energy-constrained nonlinear transformation is applied at the transmitter output to minimize the mean-squared error at the receiver, subject to a constraint on the peak transmitted energy. The proposed algorithm can be implemented with existing optimization techniques that solve the quadratic trust-region problem. It is shown that in the presence of forward error-correction codes, the proposed method results in a significant gain over earlier known techniques at the cost of a modest increase in computational complexity at the base station. 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For each symbol period, an energy-constrained nonlinear transformation is applied at the transmitter output to minimize the mean-squared error at the receiver, subject to a constraint on the peak transmitted energy. The proposed algorithm can be implemented with existing optimization techniques that solve the quadratic trust-region problem. It is shown that in the presence of forward error-correction codes, the proposed method results in a significant gain over earlier known techniques at the cost of a modest increase in computational complexity at the base station. Another advantage of the proposed precoder is that it caps the peak energy (while earlier methods cap the average energy), requiring less sophisticated power amplifiers.</description><subject>Additive white noise</subject><subject>Algorithms</subject><subject>Amplification</subject><subject>Applied sciences</subject><subject>AWGN</subject><subject>Code-division multiple access (CDMA)</subject><subject>Coding, codes</subject><subject>Costs</subject><subject>Decorrelation</subject><subject>Detectors</subject><subject>Error correction codes</subject><subject>Exact sciences and technology</subject><subject>Gaussian noise</subject><subject>Information, signal and communications theory</subject><subject>interference cancellation</subject><subject>Links</subject><subject>Multiaccess communication</subject><subject>Multiple access interference</subject><subject>multiple-access channels</subject><subject>Nonlinearity</subject><subject>quadratic optimization</subject><subject>Signal and communications theory</subject><subject>Stations</subject><subject>Symbols</subject><subject>Telecommunications and information theory</subject><subject>Transformations</subject><subject>transmitter precoding</subject><subject>Transmitters</subject><subject>trust region</subject><issn>0090-6778</issn><issn>1558-0857</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNp9kMtKw0AUhgdRsFYfQNwEQV2lziVzybKk3qClC-t6mE7O2JTcnEkX9elNbaHgwtVZnO__OedD6JrgESE4fVxk89lsRDHmIyWISMkJGhDOVYwVl6dogHGKYyGlOkcXIawxxglmbIDG4zpq2q6oim_Io86bOlRF14GPWg-2yYv6Mwp2BRVErvFR2NZ25Zu62YRo8h5nk9n4Ep05Uwa4Oswh-nh-WmSv8XT-8paNp7FlinexoUaZxClCHQgrxZIZJ3lCHFNuSSgwLhLKeJJTQoDlS5GnNOdLcKDA8VSwIXrY97a--dpA6HRVBAtlaWroz9FKpaxvx7In7_8lqcJCUU578PYPuG42vu6_0EpwJiXHaQ-RPWR9E4IHp1tfVMZvNcF6517_utc793rvvs_cHYpNsKZ0vVZbhGNQJowmYvfTzZ4rAOC45lKkCWc_4U-L3Q</recordid><startdate>200601</startdate><enddate>200601</enddate><creator>Hons, E.S.</creator><creator>Khandani, A.K.</creator><creator>Tong, W.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><general>The Institute of Electrical and Electronics Engineers, Inc. (IEEE)</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope><scope>F28</scope><scope>FR3</scope></search><sort><creationdate>200601</creationdate><title>An optimized transmitter precoding scheme for synchronous DS-CDMA</title><author>Hons, E.S. ; Khandani, A.K. ; Tong, W.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c385t-a2a8a4f812fe6c76b3af7541f38fb12e35642354d211e3db6d92d5befe8ef5963</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>Additive white noise</topic><topic>Algorithms</topic><topic>Amplification</topic><topic>Applied sciences</topic><topic>AWGN</topic><topic>Code-division multiple access (CDMA)</topic><topic>Coding, codes</topic><topic>Costs</topic><topic>Decorrelation</topic><topic>Detectors</topic><topic>Error correction codes</topic><topic>Exact sciences and technology</topic><topic>Gaussian noise</topic><topic>Information, signal and communications theory</topic><topic>interference cancellation</topic><topic>Links</topic><topic>Multiaccess communication</topic><topic>Multiple access interference</topic><topic>multiple-access channels</topic><topic>Nonlinearity</topic><topic>quadratic optimization</topic><topic>Signal and communications theory</topic><topic>Stations</topic><topic>Symbols</topic><topic>Telecommunications and information theory</topic><topic>Transformations</topic><topic>transmitter precoding</topic><topic>Transmitters</topic><topic>trust region</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hons, E.S.</creatorcontrib><creatorcontrib>Khandani, A.K.</creatorcontrib><creatorcontrib>Tong, W.</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 2005-present</collection><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><jtitle>IEEE transactions on communications</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Hons, E.S.</au><au>Khandani, A.K.</au><au>Tong, W.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>An optimized transmitter precoding scheme for synchronous DS-CDMA</atitle><jtitle>IEEE transactions on communications</jtitle><stitle>TCOMM</stitle><date>2006-01</date><risdate>2006</risdate><volume>54</volume><issue>1</issue><spage>32</spage><epage>36</epage><pages>32-36</pages><issn>0090-6778</issn><eissn>1558-0857</eissn><coden>IECMBT</coden><abstract>A technique is presented to reduce the multiple-access interference in the forward link of a direct-sequence code-division multiple-access system. For each symbol period, an energy-constrained nonlinear transformation is applied at the transmitter output to minimize the mean-squared error at the receiver, subject to a constraint on the peak transmitted energy. The proposed algorithm can be implemented with existing optimization techniques that solve the quadratic trust-region problem. It is shown that in the presence of forward error-correction codes, the proposed method results in a significant gain over earlier known techniques at the cost of a modest increase in computational complexity at the base station. Another advantage of the proposed precoder is that it caps the peak energy (while earlier methods cap the average energy), requiring less sophisticated power amplifiers.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TCOMM.2005.861691</doi><tpages>5</tpages></addata></record> |
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| identifier | ISSN: 0090-6778 |
| ispartof | IEEE transactions on communications, 2006-01, Vol.54 (1), p.32-36 |
| issn | 0090-6778 1558-0857 |
| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Additive white noise Algorithms Amplification Applied sciences AWGN Code-division multiple access (CDMA) Coding, codes Costs Decorrelation Detectors Error correction codes Exact sciences and technology Gaussian noise Information, signal and communications theory interference cancellation Links Multiaccess communication Multiple access interference multiple-access channels Nonlinearity quadratic optimization Signal and communications theory Stations Symbols Telecommunications and information theory Transformations transmitter precoding Transmitters trust region |
| title | An optimized transmitter precoding scheme for synchronous DS-CDMA |
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