Please use this identifier to cite or link to this item: https://doi.org/10.1109/TVT.2007.900387
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dc.titleA hybrid receiver scheme for multiuser multicode CDMA systems in multipath fading channels
dc.contributor.authorThian, B.S.
dc.contributor.authorWang, Y.
dc.contributor.authorTjhung, T.T.
dc.contributor.authorWong, L.W.-C.
dc.date.accessioned2014-10-07T04:22:46Z
dc.date.available2014-10-07T04:22:46Z
dc.date.issued2007-09
dc.identifier.citationThian, B.S., Wang, Y., Tjhung, T.T., Wong, L.W.-C. (2007-09). A hybrid receiver scheme for multiuser multicode CDMA systems in multipath fading channels. IEEE Transactions on Vehicular Technology 56 (5) : 3014-3023. ScholarBank@NUS Repository. https://doi.org/10.1109/TVT.2007.900387
dc.identifier.issn00189545
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/81878
dc.description.abstractIn this paper, we present a system model for multiuser multicode code-division multiple access (CDMA) in a multipath fading channel and propose a hybrid receiver scheme for the system. Conventional receivers for CDMA systems utilized interference cancellation (IC) schemes, with the RAKE receiver as an initial data estimator. However, the RAKE receiver generates inaccurate data estimates due the interference that is caused by the cross correlation between the spreading codes. This inaccurate data estimate leads to significant error propagation to the subsequent stages and thus degrades the bit error rate (BER) performance. Our proposed scheme overcomes the problem by using a more accurate initial data estimator. It consists of an equalizer for obtaining initial data estimation, followed by several stages of parallel IC (PIC). Computer simulation results show that the BER curves of our proposed scheme do not encounter an error floor under all channel conditions; in contrast, the BER curves of the conventional RAKE-PIC receiver are constrained by an irreducible error floor. In addition, in an uplink four-path channel and at a BER of 10-3, our simulation results show that a one-stage PIC achieves a 2.5-dB gain over the first stage equalization receiver. © 2007 IEEE.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1109/TVT.2007.900387
dc.sourceScopus
dc.subjectEqualization
dc.subjectEterative interference cancellation (IC)
dc.subjectMulticode code-division multiple access (M-CDMA)
dc.typeArticle
dc.contributor.departmentELECTRICAL & COMPUTER ENGINEERING
dc.description.doi10.1109/TVT.2007.900387
dc.description.sourcetitleIEEE Transactions on Vehicular Technology
dc.description.volume56
dc.description.issue5
dc.description.page3014-3023
dc.description.codenITVTA
dc.identifier.isiut000249735500019
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