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Article: Performance of wideband CDMA systems with complex spreading and imperfect channel estimation
Title | Performance of wideband CDMA systems with complex spreading and imperfect channel estimation |
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Authors | |
Keywords | Channel estimation complex spreading RAKE reception wideband CDMA |
Issue Date | 2001 |
Publisher | IEEE. |
Citation | IEEE Journal on Selected Areas in Communications, 2001, v. 19 n. 1, p. 152-163 How to Cite? |
Abstract | The 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 Identifier | http://hdl.handle.net/10722/44857 |
ISSN | 2023 Impact Factor: 13.8 2023 SCImago Journal Rankings: 8.707 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Wang, J | en_HK |
dc.contributor.author | Chen, J | en_HK |
dc.date.accessioned | 2007-10-30T06:11:45Z | - |
dc.date.available | 2007-10-30T06:11:45Z | - |
dc.date.issued | 2001 | en_HK |
dc.identifier.citation | IEEE Journal on Selected Areas in Communications, 2001, v. 19 n. 1, p. 152-163 | en_HK |
dc.identifier.issn | 0733-8716 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/44857 | - |
dc.description.abstract | The 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.extent | 361548 bytes | - |
dc.format.extent | 1802 bytes | - |
dc.format.extent | 2326 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.format.mimetype | text/plain | - |
dc.format.mimetype | text/plain | - |
dc.language | eng | en_HK |
dc.publisher | IEEE. | en_HK |
dc.relation.ispartof | IEEE Journal on Selected Areas in Communications | - |
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. | - |
dc.subject | Channel estimation | en_HK |
dc.subject | complex spreading | en_HK |
dc.subject | RAKE reception | en_HK |
dc.subject | wideband CDMA | en_HK |
dc.title | Performance of wideband CDMA systems with complex spreading and imperfect channel estimation | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://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+estimation | en_HK |
dc.description.nature | published_or_final_version | en_HK |
dc.identifier.doi | 10.1109/49.909617 | en_HK |
dc.identifier.scopus | eid_2-s2.0-0035073622 | - |
dc.identifier.hkuros | 60584 | - |
dc.identifier.isi | WOS:000167394600014 | - |
dc.identifier.issnl | 0733-8716 | - |