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Article: Performance of wideband CDMA systems with complex spreading and imperfect channel estimation

TitlePerformance of wideband CDMA systems with complex spreading and imperfect channel estimation
Authors
KeywordsChannel estimation
complex spreading
RAKE reception
wideband CDMA
Issue Date2001
PublisherIEEE.
Citation
IEEE Journal on Selected Areas in Communications, 2001, v. 19 n. 1, p. 152-163 How to Cite?
AbstractThe coherent RAKE reception of wideband code division multiple access (W-CDMA) signals with complex spreading is considered. A general multipath-fading channel model is assumed. A dedicated pilot channel, which is separate from the data channels, is used for the purpose of channel estimation. Based on a digital implementation, the coherent demodulation scheme is presented. Pilot channel estimation error, due to multiple access and multipath interference, is studied. The system performance is evaluated by means of the bit error rate (BER). The analysis shows that the error of channel estimation significantly degrades system performance and can be effectively suppressed by low pass filters (LPFs). A discussion on the envelope variation of complex spread signals is also included, which illustrates that the complex spread signal has a more stable envelope than the dual-channel spread signal. The power ratio of pilot to data channels should be chosen in the range of 0.2 to 0.4 (or -7 to -4 dB), in order to achieve maximum system capacity.
Persistent Identifierhttp://hdl.handle.net/10722/44857
ISSN
2015 Impact Factor: 3.672
2015 SCImago Journal Rankings: 2.915
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, Jen_HK
dc.contributor.authorChen, Jen_HK
dc.date.accessioned2007-10-30T06:11:45Z-
dc.date.available2007-10-30T06:11:45Z-
dc.date.issued2001en_HK
dc.identifier.citationIEEE Journal on Selected Areas in Communications, 2001, v. 19 n. 1, p. 152-163en_HK
dc.identifier.issn0733-8716en_HK
dc.identifier.urihttp://hdl.handle.net/10722/44857-
dc.description.abstractThe coherent RAKE reception of wideband code division multiple access (W-CDMA) signals with complex spreading is considered. A general multipath-fading channel model is assumed. A dedicated pilot channel, which is separate from the data channels, is used for the purpose of channel estimation. Based on a digital implementation, the coherent demodulation scheme is presented. Pilot channel estimation error, due to multiple access and multipath interference, is studied. The system performance is evaluated by means of the bit error rate (BER). The analysis shows that the error of channel estimation significantly degrades system performance and can be effectively suppressed by low pass filters (LPFs). A discussion on the envelope variation of complex spread signals is also included, which illustrates that the complex spread signal has a more stable envelope than the dual-channel spread signal. The power ratio of pilot to data channels should be chosen in the range of 0.2 to 0.4 (or -7 to -4 dB), in order to achieve maximum system capacity.en_HK
dc.format.extent361548 bytes-
dc.format.extent1802 bytes-
dc.format.extent2326 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherIEEE.en_HK
dc.rights©2001 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectChannel estimationen_HK
dc.subjectcomplex spreadingen_HK
dc.subjectRAKE receptionen_HK
dc.subjectwideband CDMAen_HK
dc.titlePerformance of wideband CDMA systems with complex spreading and imperfect channel estimationen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0733-8716&volume=19&issue=1&spage=152&epage=163&date=2001&atitle=Performance+of+wideband+CDMA+systems+with+complex+spreading+and+imperfect+channel+estimationen_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1109/49.909617en_HK
dc.identifier.scopuseid_2-s2.0-0035073622-
dc.identifier.hkuros60584-
dc.identifier.isiWOS:000167394600014-

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