A study of UMTS terrestrial radio access performance

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Holma, Harri
dc.date.accessioned 2012-02-10T08:59:55Z
dc.date.available 2012-02-10T08:59:55Z
dc.date.issued 2003-10-24
dc.identifier.isbn 951-22-6718-7
dc.identifier.issn 0356-5087
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/2119
dc.description.abstract This thesis considers the performance evaluation of third generation radio networks, in particular UMTS Terrestrial Radio Access (UTRA). First, the performance evaluation methods are presented. The typical capacity of UTRA is estimated using those methods and a few solutions are evaluated to improve the capacity and coverage. The thesis further studies the effect of base station synchronization on the performance of UTRA time division duplex mode. The performance evaluation is based on the combination of theoretical calculations, link and system level simulations, and laboratory and field measurements. It is shown that these different evaluation methods give similar results and – when combined together – they can be used for the radio network development purposes. The simulation results indicate that the typical WCDMA, i.e. UTRA frequency division duplex mode, macro cell capacity is between 600 and 1000 kbps per sector per 5 MHz. The capacity is sensitive to the environment and to the transceiver performance. The results further show that user bit rates up to 2 Mbps can be provided locally for packet data with the basic Rake receiver, but not for full coverage circuit switched connections in macro cells. The following performance enhancement techniques are evaluated in this thesis: soft combining of packet retransmissions, base station multiuser detection and 4-branch base station receiver diversity. The link level simulations show that soft combining can provide a gain up to 2.0 dB, which can be used to increase the capacity up to 60 %. The performance of base station multiuser detection is evaluated with link and system level simulations. It is shown that the studied sub-optimal multiuser detector is able to remove 60-70 % of the intra-cell interference. That gain can be utilized to improve the uplink capacity by 50-100 % or the coverage by 1-2 dB. The performance of 4-branch antenna diversity is evaluated in the simulations and in the field measurements. The results show that the average coverage gain of 4-branch diversity with two separate cross-polarized antennas is 3 dB compared to 2-branch diversity with one cross-polarized antenna. The synchronization requirements of UTRA time division duplex base stations are studied with system simulations. The results show that synchronization is a key requirement for time division duplex operation, especially for the uplink performance. The study indicates that co-location of different operators' base stations is feasible in time division duplex operation only if the two networks are synchronized and if an identical split between uplink and downlink is used. en
dc.format.extent 80, [101]
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Helsinki University of Technology en
dc.publisher Teknillinen korkeakoulu fi
dc.relation.ispartofseries Technical report / Helsinki University of Technology, Communications Laboratory. T en
dc.relation.ispartofseries 49 en
dc.relation.haspart Westman T. and Holma H., 1997. CDMA system for UMTS high bit rate services. Proceedings of the IEEE Vehicular Technology Conference (VTC'97). Phoenix, Arizona, USA, 4-7 May 1997, pages 825-829. [article1.pdf] © 1997 IEEE. By permission.
dc.relation.haspart Pehkonen K., Holma H., Keskitalo I., Nikula E. and Westman T., 1997. A performance analysis of TDMA and CDMA based air interface solutions for UMTS high bit rate services. Proceedings of the IEEE International Symposium on Personal, Indoor and Mobile Radio Conference (PIMRC'97). Helsinki, Finland, 1-4 September 1997, pages 22-26. [article2.pdf] © 1997 IEEE. By permission.
dc.relation.haspart Hämäläinen S., Holma H., Toskala A. and Laukkanen M., 1997. Analysis of CDMA downlink capacity enhancements. Proceedings of the IEEE International Symposium on Personal, Indoor and Mobile Radio Conference (PIMRC'97). Helsinki, Finland, 1-4 September 1997, pages 241-245. [article3.pdf] © 1997 IEEE. By permission.
dc.relation.haspart Hämäläinen S., Slanina P., Hartman M., Lappeteläinen A. and Holma H., 1997. A novel interface between link and system level simulations. Proceedings of the ACTS Mobile Telecommunications Summit'97. Aalborg, Denmark, 7-10 October 1997, pages 599-604.
dc.relation.haspart Toskala A., Hämäläinen S. and Holma H., 1998. Link and system level performance of multiuser detection CDMA uplink. Wireless Personal Communications 8, No. 3, pages 301-320. [article5.pdf] © 1998 by authors and © 1998 Kluwer Academic Publishers. By permission.
dc.relation.haspart Holma H., Toskala A. and Latva-aho M., 1998. Asynchronous wideband CDMA for IMT-2000. Telecommunications Review 8, No. 6, pages 1007-1021. [article6.pdf] © 1998 by authors and © 1998 SK Telecom. By permission.
dc.relation.haspart Raitola M. and Holma H., 1998. Wideband CDMA packet data with hybrid ARQ. Proceedings of the IEEE International Symposium on Spread Spectrum Techniques & Applications (ISSSTA'98). Sun City, South Africa, 2-4 September 1998, pages 318-322. [article7.pdf] © 1998 IEEE. By permission.
dc.relation.haspart Holma H. and Heiska K., 1999. Performance of high bit rates with WCDMA over multipath channels. Proceedings of the IEEE Vehicular Technology Conference (VTC'99 Spring). Houston, USA, 16-20 May 1999, pages 25-29. [article8.pdf] © 1999 IEEE. By permission.
dc.relation.haspart Hämäläinen S., Holma H. and Sipilä K., 1999. Advanced WCDMA radio network simulator. Proceedings of the IEEE International Symposium on Personal, Indoor and Mobile Radio Conference (PIMRC'99). Osaka, Japan, 12-15 September 1999, pages 951-955. [article9.pdf] © 1999 IEEE. By permission.
dc.relation.haspart Holma H., Lehtinen O., Toskala A. and Heikkinen S., 2000. Interference considerations for the time division duplex mode of the UMTS Terrestrial Radio Access. IEEE Journal on Selected Areas in Communications: Special issue on Wideband CDMA 18, No. 8, pages 1386-1393. [article10.pdf] © 2000 IEEE. By permission.
dc.relation.haspart Tölli A. and Holma H., 2000. Comparison of WCDMA uplink antenna solutions with 4 receiver branches. Proceedings of the CDMA International Conference (CIC). South Korea, 25-28 October 2000, pages 57-61. [article11.pdf] © 2000 CIC. By permission.
dc.relation.haspart Holma H. and Tölli A., 2001. Simulated and measured performance of 4-branch uplink reception in WCDMA. Proceedings of the IEEE Vehicular Technology Conference (VTC'2001 Spring). Greece, 6-9 May 2001, pages 2640-2644. [article12.pdf] © 2001 IEEE. By permission.
dc.relation.haspart Holma H., Soldani D. and Sipilä K., 2001. Simulated and measured WCDMA uplink performance. Proceedings of the IEEE Vehicular Technology Conference (VTC'2001 Fall). Atlantic City, NJ, USA, 7-11 October 2001, pages 1148-1152. [article13.pdf] © 2001 IEEE. By permission.
dc.subject.other Electrical engineering en
dc.title A study of UMTS terrestrial radio access performance en
dc.type G5 Artikkeliväitöskirja fi
dc.description.version reviewed en
dc.contributor.department Department of Electrical and Communications Engineering en
dc.contributor.department Sähkö- ja tietoliikennetekniikan osasto fi
dc.subject.keyword wideband code division multiple access (WCDMA) en
dc.subject.keyword radio network simulations en
dc.subject.keyword capacity en
dc.subject.keyword multiuser detection en
dc.subject.keyword antenna diversity en
dc.identifier.urn urn:nbn:fi:tkk-000877
dc.type.dcmitype text en
dc.type.ontasot Väitöskirja (artikkeli) fi
dc.type.ontasot Doctoral dissertation (article-based) en
dc.contributor.lab Laboratory of Communications Engineering en
dc.contributor.lab Tietoliikennetekniikan laboratorio fi


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