{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,1]],"date-time":"2025-02-01T05:30:44Z","timestamp":1738387844272,"version":"3.35.0"},"reference-count":21,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2008,9,12]],"date-time":"2008-09-12T00:00:00Z","timestamp":1221177600000},"content-version":"vor","delay-in-days":2568,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Trans Emerging Tel Tech"],"published-print":{"date-parts":[[2001,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Simple linear demodulation schemes exploiting the space and time diversity of the mobile radio channel are derived for the downlink of the Univeral Mobile Telecommunication System (UMTS) employing wideband codedivision multiple access (WCDMA). Using different stochastic models of the signals at the M \u00d7 1 receiver antennas and different objective functions including minimum\u2014mean square error (MMSE) and maximum\u2014likelihood approaches, we obtain time\u2014invariant and time\u2014variant detection schemes which make use of channel and receiver parameter estimates being calculated upon observation of a single slot. It turns out that the bit\u2014error rate (BER) of the conventional receiver carrying out a maximum\u2014ratio combining w. r. t. time and space can be improved considerably, where the achievable gain depends critically on the accuracy of the aforementioned estimates. Efficient ways for implementation are proposed and quantified in terms of the computational complexity. Analytical approximations and simulations of the BER for different system parameters reveal that the schemes represent means to get robust against both channel fading and multiple access interference caused by multipath propagation.<\/jats:p>","DOI":"10.1002\/ett.4460120504","type":"journal-article","created":{"date-parts":[[2008,9,12]],"date-time":"2008-09-12T14:00:34Z","timestamp":1221228034000},"page":"379-391","source":"Crossref","is-referenced-by-count":9,"title":["Linear space\u2014time diversity receivers for the downlink of UMTS with WCDMA"],"prefix":"10.1002","volume":"12","author":[{"given":"Andreas","family":"Jarosch","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dirk","family":"Dahlhaus","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2008,9,12]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1109\/25.728482"},{"key":"e_1_2_1_3_2","doi-asserted-by":"crossref","unstructured":"S.WernerandJ.Lilleberg Downlink channel decorrelation in CDMA systems with long codes. InProc. of the 49th IEEE Vehicular Technology Conference Vol.2 pages1614\u201317 Houston Texas 16\u201320 May1999.","DOI":"10.1109\/VETEC.1999.780668"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1145\/321541.321549"},{"key":"e_1_2_1_5_2","unstructured":"M.Latva\u2013aho Advanced Receivers for Wideband CDMA Systems. PhD thesis Univ. Oulu Finland Acta Universitatis Ouluensis 1998."},{"key":"e_1_2_1_6_2","doi-asserted-by":"crossref","unstructured":"I.GhauriandD. T. M.Slock Linear receivers for the DS\u2013CDMA downlink exploiting orthogonality of spreading sequences.32nd Asilomar Conf. on Sig. Syst. and Comp. Vol. 1 pages650\u2013654 1998.","DOI":"10.1109\/ACSSC.1998.750943"},{"key":"e_1_2_1_7_2","doi-asserted-by":"crossref","unstructured":"M. J.Heikkil\u00e4 P.Komulainen andJ.Lilleberg Interference suppression in CDMA downlink through adaptive channel equalization. InProc. of the 50th IEEE Vehicular Technology Conference (VTC '99\u2013Fall) Vol.2 pages978\u2013982 1999.","DOI":"10.1109\/VETECF.1999.798476"},{"key":"e_1_2_1_8_2","doi-asserted-by":"crossref","unstructured":"A. J.WeissandB.Friedlander CDMA downlink channel estimation with aperiodic scrambling. InProc. of the 31st Asilomar Conf. on Signals Systems & Computers.Vol. 2 pages828\u2013832 Pacific Grove CA November1997.","DOI":"10.1109\/ACSSC.1997.680559"},{"key":"e_1_2_1_9_2","unstructured":"D.Dahlhaus A.Jarosch andZ.Cheng Smart antenna concepts for the UMTS terrestrial radio access. 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