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Channel adaptive multiple access and intersymbol interference cancellation techniques for TDD-mode UMTS receivers

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Original languageEnglish
Title of host publicationIEE Second International Conference on 3G Mobile Communication Technologies
Publisher or commissioning bodyInstitution of Electrical Engineers (IEE)
Publication dateMar 2001
Pages267 - 271
ISBN (Print)0852967314
DOIs
StatePublished

Conference

Conference2nd International Conference on 3G Mobile Communication Technologies
CountryUnited Kingdom
CityLondon
Period1/03/01 → …

Abstract

This paper presents a comparison of simulation results for various time division duplex (TDD) UMTS receiver architectures. Uplink and downlink simulations are performed over frequency-selective time varying channels. Results indicate that in practice, satisfactory performance cannot be obtained using fixed branch receiver architectures. To overcome this limitation, a reconfigurable blind adaptive linear minimum mean square error (LMMSE) receiver is proposed to simultaneously track channel variations and mitigate the effects of multiple access interference and intersymbol interference. This new method is compared with the standard correlator, RAKE receiver and chip level equalisation techniques. System performance is studied in terms of uncoded bit error rate for low and medium levels of RMS delay spread. Simulations demonstrate that adaptive branch and parameter selection greatly reduces the interference floor in multi-user CDMA systems. More specifically, the proposed reconfigurable blind adaptive LMMSE is shown to offer competitive results at low relative complexity. This approach can be used to improve the performance and capacity of TDD mode UMTS networks

Additional information

Rose publication type: Conference contribution Sponsorship: The authors are grateful for the financial and technical support of Toshiba Research Europe Ltd, Bristol, UK Other identifier: IEE Conf. Publ. No. 477

Research areas

  • delays, adaptive signal processing, cellular radio, code division multiple access

Event

2nd International Conference on 3G Mobile Communication Technologies

Duration1 Mar 2001 → …
CountryUnited Kingdom
CityLondon

Event: Conference

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