Adaptive generalized rake reception in DS-CDMA systems - [transactions papers]
Direct-sequence code-division multiple-access (DSCDMA) cellular systems, such as wideband CDMA (WCDMA), are limited in performance by interference. Linear equalization, such as generalized Rake (G-Rake) receivers and transversal chip equalizers, can theoretically provide significant gains in perform...
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| Veröffentlicht in: | IEEE transactions on wireless communications 2009-07, Vol.8 (7), p.3464-3474 |
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| container_title | IEEE transactions on wireless communications |
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| creator | Fulghum, T. Cairns, D. Cozzo, C. Wang, Y.-P. Bottomley, G. |
| description | Direct-sequence code-division multiple-access (DSCDMA) cellular systems, such as wideband CDMA (WCDMA), are limited in performance by interference. Linear equalization, such as generalized Rake (G-Rake) receivers and transversal chip equalizers, can theoretically provide significant gains in performance by suppressing interference. In this paper, an adaptive G-Rake receiver is developed, employing practical algorithms for finger placement and weight computation. Finger placement is determined by selecting delays from a candidate set using a "maximal-weight" criterion. Weight computation includes estimation of an impairment covariance matrix using a parametric approach. While described in the context of the downlink, these algorithms can be used in the uplink as well. Both single-antenna and dual-antenna receivers are considered. Link and system performance are evaluated for the downlink, showing significant gains in high-rate coverage. |
| doi_str_mv | 10.1109/TWC.2009.060330 |
| format | Article |
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Linear equalization, such as generalized Rake (G-Rake) receivers and transversal chip equalizers, can theoretically provide significant gains in performance by suppressing interference. In this paper, an adaptive G-Rake receiver is developed, employing practical algorithms for finger placement and weight computation. Finger placement is determined by selecting delays from a candidate set using a "maximal-weight" criterion. Weight computation includes estimation of an impairment covariance matrix using a parametric approach. While described in the context of the downlink, these algorithms can be used in the uplink as well. Both single-antenna and dual-antenna receivers are considered. 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Linear equalization, such as generalized Rake (G-Rake) receivers and transversal chip equalizers, can theoretically provide significant gains in performance by suppressing interference. In this paper, an adaptive G-Rake receiver is developed, employing practical algorithms for finger placement and weight computation. Finger placement is determined by selecting delays from a candidate set using a "maximal-weight" criterion. Weight computation includes estimation of an impairment covariance matrix using a parametric approach. While described in the context of the downlink, these algorithms can be used in the uplink as well. Both single-antenna and dual-antenna receivers are considered. Link and system performance are evaluated for the downlink, showing significant gains in high-rate coverage.</description><subject>Applied sciences</subject><subject>channel estimation</subject><subject>Coherent demodulation</subject><subject>Delay</subject><subject>Detection, estimation, filtering, equalization, prediction</subject><subject>Downlink</subject><subject>Equalizers</subject><subject>Equipments and installations</subject><subject>Exact sciences and technology</subject><subject>Fingers</subject><subject>Information, signal and communications theory</subject><subject>Interference suppression</subject><subject>Mobile radiocommunication systems</subject><subject>Multiaccess communication</subject><subject>Multiple access interference</subject><subject>Performance gain</subject><subject>Radiocommunications</subject><subject>RAKE receivers</subject><subject>Signal and communications theory</subject><subject>Signal, noise</subject><subject>Systems, networks and services of telecommunications</subject><subject>Telecommunications</subject><subject>Telecommunications and information theory</subject><subject>Transmission and modulation (techniques and equipments)</subject><subject>Transmitters. 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Receivers</topic><topic>Wideband</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Fulghum, T.</creatorcontrib><creatorcontrib>Cairns, D.</creatorcontrib><creatorcontrib>Cozzo, C.</creatorcontrib><creatorcontrib>Wang, Y.-P.</creatorcontrib><creatorcontrib>Bottomley, G.</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>Computer and Information Systems Abstracts</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest Computer Science Collection</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Computer and Information Systems Abstracts Academic</collection><collection>Computer and Information Systems Abstracts Professional</collection><jtitle>IEEE transactions on wireless communications</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Fulghum, T.</au><au>Cairns, D.</au><au>Cozzo, C.</au><au>Wang, Y.-P.</au><au>Bottomley, G.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Adaptive generalized rake reception in DS-CDMA systems - [transactions papers]</atitle><jtitle>IEEE transactions on wireless communications</jtitle><stitle>TWC</stitle><date>2009-07-01</date><risdate>2009</risdate><volume>8</volume><issue>7</issue><spage>3464</spage><epage>3474</epage><pages>3464-3474</pages><issn>1536-1276</issn><eissn>1558-2248</eissn><coden>ITWCAX</coden><abstract>Direct-sequence code-division multiple-access (DSCDMA) cellular systems, such as wideband CDMA (WCDMA), are limited in performance by interference. Linear equalization, such as generalized Rake (G-Rake) receivers and transversal chip equalizers, can theoretically provide significant gains in performance by suppressing interference. In this paper, an adaptive G-Rake receiver is developed, employing practical algorithms for finger placement and weight computation. Finger placement is determined by selecting delays from a candidate set using a "maximal-weight" criterion. Weight computation includes estimation of an impairment covariance matrix using a parametric approach. While described in the context of the downlink, these algorithms can be used in the uplink as well. Both single-antenna and dual-antenna receivers are considered. Link and system performance are evaluated for the downlink, showing significant gains in high-rate coverage.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TWC.2009.060330</doi><tpages>11</tpages></addata></record> |
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| subjects | Applied sciences channel estimation Coherent demodulation Delay Detection, estimation, filtering, equalization, prediction Downlink Equalizers Equipments and installations Exact sciences and technology Fingers Information, signal and communications theory Interference suppression Mobile radiocommunication systems Multiaccess communication Multiple access interference Performance gain Radiocommunications RAKE receivers Signal and communications theory Signal, noise Systems, networks and services of telecommunications Telecommunications Telecommunications and information theory Transmission and modulation (techniques and equipments) Transmitters. Receivers Wideband |
| title | Adaptive generalized rake reception in DS-CDMA systems - [transactions papers] |
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